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Information on EC 2.4.2.8 - hypoxanthine phosphoribosyltransferase
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2.4.2.8 hypoxanthine phosphoribosyltransferaseIUBMB Comments
Guanine and purine-6-thiol can replace hypoxanthine.
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Word Map
- 2.4.2.8
- hamster
- lymphocyte
- lesch-nyhan
-
genotoxic
- 6-thioguanine
-
x-linked
-
salvage
- ovary
- gapdh
- adduct
- erythrocyte
-
normfinder
-
genorm
- nucleoside
-
housekeeping
- t-lymphocytes
- thymidine
-
uric
-
lymphoblastoid
- lymphoblast
-
x-chromosome
- tbp
- hyperuricemia
-
chromatid
-
bestkeeper
-
benzoapyrene
-
micronuclei
- gout
-
transversions
-
cytogenetic
-
clastogenic
-
phosphoribosylpyrophosphate
- comet
- allopurinol
- methanesulfonate
-
ywhaz
- aminopterin
-
sister-chromatid
-
x-ray-induced
-
non-transcribed
-
mutable
- 1,3-butadiene
-
n-ethyl-n-nitrosourea
-
repair-deficient
- lns
-
32p-postlabeling
- biotechnology
- medicine
- analysis
- drug development
- synthesis
- butadiene
- pharmacology
-
repair-proficient
-
micronucleated
-
x-inactivation
- molecular biology
- diagnostics
The enzyme appears in viruses and cellular organisms
Synonyms
6-hydroxypurine phosphoribosyltransferase, 6-mercaptopurine phosphoribosyltransferase, 6-oxo PRTase, 6-oxopurine phosphoribosyltransferase, 6-oxopurine PRTase, Cthe_2254, EcHPRT, GMP pyrophosphorylase, GPRT, gpT-2, 
more
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SYNONYM 
ORGANISM
UNIPROT
COMMENTARY 
LITERATURE
6-hydroxypurine phosphoribosyltransferase
-
-
-
-
6-mercaptopurine phosphoribosyltransferase
-
-
-
-
6-oxo PRTase
6-oxopurine phosphoribosyltransferase
6-oxopurine PRTase
Cthe_2254
GMP pyrophosphorylase
-
-
-
-
GPRT
gpT-2
guanine phosphoribosyltransferase
-
-
-
-
guanine-hypoxanthine phosphoribosyltransferase
-
-
-
-
guanosine 5'-phosphate pyrophosphorylase
-
-
-
-
guanosine phosphoribosyltransferase
-
-
-
-
guanylate pyrophosphorylase
-
-
-
-
guanylic pyrophosphorylase
-
-
-
-
HGPRT
HGPRTase
HGXPRT
HGXPRTase
HPRT
HPRT1
HPT
hypoxanthine guanine phosphoribosyltransferase
hypoxanthine guanine xanthine phosphoribosyltransferase
hypoxanthine phosphoribosyltransferase
hypoxanthine-guanine phosphoribosyl transferase
hypoxanthine-guanine phosphoribosyltransferase
hypoxanthine-guanine phosphoribosyltransferase/adenylate kinase
hypoxanthine-guanine-xanthine phosphoribosyltransferase
hypoxanthine-guanine-[xanthine]-phosphoribosyltransferase
-
IMP pyrophosphorylase
-
-
-
-
IMP-GMP pyrophosphorylase
-
-
-
-
inosinate pyrophosphorylase
-
-
-
-
inosine 5'-phosphate pyrophosphorylase
-
-
-
-
inosinic acid pyrophosphorylase
-
-
-
-
inosinic pyrophosphorylase
-
-
-
-
MSMEG_6110
MtHGPRT
PF3D7_1012400
phosphoribosyltransferase, 6-mercaptopurine
-
-
-
-
phosphoribosyltransferase, hypoxanthine
-
-
-
-
plasma hypoxanthine-guanine phosphoribosyl transferase
purine-6-thiol phosphoribosyltransferase
-
-
-
-
PvHGPRT
SSO2424
transphosphoribosidase
-
-
-
-
TthHPRT
TT_C1766
ZgHGPRT/AMPK
additional information
GPRT
-
phosphoribosyltransferases for hypoxanthine and guanine are separate enzymes
GPRT
-
phosphoribosyltransferases for hypoxanthine and guanine are separate enzymes
HGPRT
-
-
-
-
HGPRTase
-
-
-
-
HPRT
-
phosphoribosyltransferases for hypoxanthine and guanine are separate enzymes
HPRT
-
-
HPRT
-
phosphoribosyltransferases for hypoxanthine and guanine are separate enzymes
hypoxanthine guanine phosphoribosyltransferase
-
hypoxanthine-guanine phosphoribosyltransferase
-
-
-
-
hypoxanthine-guanine phosphoribosyltransferase
-
-
hypoxanthine-guanine phosphoribosyltransferase
-
hypoxanthine-guanine phosphoribosyltransferase
-
-
hypoxanthine-guanine phosphoribosyltransferase
-
hypoxanthine-guanine phosphoribosyltransferase/adenylate kinase
-
hypoxanthine-guanine phosphoribosyltransferase/adenylate kinase
-
-
hypoxanthine-guanine phosphoribosyltransferase/adenylate kinase
-
-
hypoxanthine-guanine phosphoribosyltransferase/adenylate kinase
-
-
hypoxanthine-guanine phosphoribosyltransferase/adenylate kinase
-
-
hypoxanthine-guanine phosphoribosyltransferase/adenylate kinase
-
-
hypoxanthine-guanine-xanthine phosphoribosyltransferase
-
hypoxanthine-guanine-xanthine phosphoribosyltransferase
-
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REACTION
REACTION DIAGRAM
COMMENTARY
ORGANISM
UNIPROT
LITERATURE
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
reaction mechanism
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
kinetic mechanism
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
ordered bi-bi mechanism
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
ordered bi-bi mechanism
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
catalytic mechanism
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
catalytic mechanism
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
catalytic mechanism
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
catalytic mechanism
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
catalytic mechanism
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
active site structure
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
active site structure
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
active site structure
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
active site structure
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
active site structure
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
residues I99-L121 form the catalytic loop
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
Thr47 binds diphosphate
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
essential role of Ser95-Tyr96 dyade in catalysis
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
kinetic model
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
during catalysis a long flexible loop closes over the active site, functional role
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
guanine and 6-mercaptopurine can replace hypoxanthine
-
-
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
ordered bi bi kinetic mechanism with 5-phospho-alpha-D-ribose 1-diphosphate binding first followed by the purine base
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
ordered bi bi reaction mechanism, formation of dead-end complexes with purine substrates and diphosphate
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
reaction mechanism, function and influence of invariant active site loop I residues on enzyme efficiency in forward and reverse reaction
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
reaction mechanism, the flexible loop II, comprising 12 amino acid residues, closes over the active site of the enzyme as it approaches the transition state, the loop is required for full activity, structure-function relationship for the conserved residues
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
residue F36 is responsible for substrate specificity, structure-function relationship
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
residue L44 is responsible for substrate specificity, structure-function relationship
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
sequential mechanism with 5-phospho-alpha-D-ribose 1-diphosphate binding first, active site helix comprising D137-D153 with key active site residues K68, D137, and K165, substrate binding sites and structures, overview
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
substrate binding structure and mechanism, a non-proline cis-peptide may be essential for activity
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
binding structure involving residue K68 at the AB-dimer interface and residues V96 and D97 of the opposing subunit, overview. Residues E133 and D137 block the binding of 5-phospho-alpha-D-ribose 1-diphosphate, mechanism, overview
-
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
ordered reaction mechanism, 5-phospho-alpha-D-ribose 1-diphosphate-Mg2+ binds first followed by the purine base. After the covalent reaction, diphosphate then dissociates from the complex and the nucleoside monophosphate is released in the rate-limiting step
IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
ordered reaction mechanism. The substrates bind in a functionally ordered fashion, with 5-phospho-alpha-D-ribose 1-diphosphate binding first in the forward direction and IMP or GMP first in the reverse reaction, transition state structure and 5'-phosphate binding structure on HGPRT, overview
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REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
pentosyl group transfer
pentosyl group transfer
-
-
-
-
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PATHWAY SOURCE
PATHWAYS
BRENDA
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SYSTEMATIC NAME
IUBMB Comments
IMP:diphosphate phospho-D-ribosyltransferase
Guanine and purine-6-thiol can replace hypoxanthine.
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CAS REGISTRY NUMBER
COMMENTARY
9016-12-0
-
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SUBSTRATE
PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate)
(Substrate)
LITERATURE
(Substrate)
(Substrate)
COMMENTARY
(Product)
(Product)
LITERATURE
(Product)
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
r=reversible
ir=irreversible
?=not specified
2-amino-6-mercaptopurine + 5-phospho-alpha-D-ribose 1-diphosphate
2-amino-6-mercaptopurine ribotide + diphosphate
-
-
-
-
?
2-hydroxy-6-mercaptopurine + 5-phospho-alpha-D-ribose 1-diphosphate
2-hydroxy-6-mercaptopurine ribotide + diphosphate
-
-
-
-
?
3-hydroxy-2-pyrazinecarboxamide + 5-phospho-alpha-D-ribose 1-diphosphate
3-oxo-4-(5-O-phosphono-beta-D-ribofuranosyl)-3,4-dihydropyrazine-2-carboxamide + diphosphate
T-1105, poor substrate
-
-
?
3-hydroxy-2-pyrazinecarboxamide + 5-phospho-alpha-D-ribose 1-diphosphate
? + diphosphate
T-1105, poor substrate
-
-
?
6-fluoro-3-hydroxy-2-pyrazinecarboxamide + 5-phospho-alpha-D-ribose 1-diphosphate
6-fluoro-3-oxo-4-(5-O-phosphono-beta-D-ribofuranosyl)-3,4-dihydropyrazine-2-carboxamide + diphosphate
T-705, poor substrate
-
-
?
6-fluoro-3-hydroxy-2-pyrazinecarboxamide + 5-phospho-alpha-D-ribose 1-diphosphate
? + diphosphate
T-705, poor substrate
-
-
?
6-mercaptopurine + 5-phospho-alpha-D-ribose 1-diphosphate
6-mercaptopurine 5'-phosphate + diphosphate
-
-
-
?
6-mercaptopurine + 5-phospho-alpha-D-ribose 1-diphosphate
6-mercaptopurine ribotide + diphosphate
6-mercaptopurine + 5-phospho-alpha-D-ribose 1-diphosphate
6-thioinosine monophosphate + diphosphate
-
-
-
-
?
6-mercaptopurine + 5-phospho-alpha-D-ribose 1-diphosphate
thioinosinic monophosphate + diphosphate
-
a thiopurine antimetabolite
a therapeutically active metabolite
-
?
6-thioguanine + 5-phospho-alpha-D-ribose 1-diphosphate
6-thio-GMP + diphosphate
-
-
-
-
?
8-azaguanine + 5-phospho-alpha-D-ribose 1-diphosphate
8-aza-IMP + diphosphate
high activity
-
-
?
8-azahypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
8-aza-IMP + diphosphate
-
-
-
-
?
allopurinol + 5-phospho-alpha-D-ribose 1-diphosphate
allopurinol ribonucleoside 5'-monophosphate + diphosphate
XMP + diphosphate
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
r
6-mercaptopurine + 5-phospho-alpha-D-ribose 1-diphosphate
6-mercaptopurine ribotide + diphosphate
-
-
-
-
?
6-mercaptopurine + 5-phospho-alpha-D-ribose 1-diphosphate
6-mercaptopurine ribotide + diphosphate
-
-
-
?
6-mercaptopurine + 5-phospho-alpha-D-ribose 1-diphosphate
6-mercaptopurine ribotide + diphosphate
-
-
-
-
?
6-mercaptopurine + 5-phospho-alpha-D-ribose 1-diphosphate
6-mercaptopurine ribotide + diphosphate
-
-
-
-
?
adenine + 5-phospho-alpha-D-ribose 1-diphosphate
AMP + diphosphate
low activity
-
-
?
adenine + 5-phospho-alpha-D-ribose 1-diphosphate
AMP + diphosphate
low activity
-
-
?
adenine + 5-phospho-alpha-D-ribose 1-diphosphate
AMP + diphosphate
low activity
-
-
?
allopurinol + 5-phospho-alpha-D-ribose 1-diphosphate
allopurinol ribonucleoside 5'-monophosphate + diphosphate
-
low activity
-
?
allopurinol + 5-phospho-alpha-D-ribose 1-diphosphate
allopurinol ribonucleoside 5'-monophosphate + diphosphate
-
-
-
?
GMP + diphosphate
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
-
?
GMP + diphosphate
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
-
?
GMP + diphosphate
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
?
GMP + diphosphate
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
r
GMP + diphosphate
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
r
GMP + diphosphate
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
6-oxopurine salvage pathway reaction
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
low activity
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
phosphoribosyltransferases for hypoxanthine and guanine are separate enzymes, and catalyse the 2 reactions with different specificities
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
binds hypoxanthine 67-times less effectively than guanine and 4-times less effectively than xanthine
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
absolutely specific for guanine
diphosphate binds at Thr70, diphosphate-binding loop sequence: LTGA
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
guanine is utilized more rapidly than hypoxanthine
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
salvage synthesis
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
wild-type enzyme, no activity with mutant F36L
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
wild-type and chimeric mutant enzyme
modeling of GMP binding to the chimeric enzyme
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
wild-type and chimeric mutant enzyme
modeling of GMP binding to the chimeric enzyme
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
hypoxanthine and guanine preferred substrates
-
-
ir
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
phosphoribosyltransferases for hypoxanthine and guanine are separate enzymes, and catalyse the 2 reactions with different specificities
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
Thermus thermophilus HB8 / ATCC 27634 / DSM 579
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
a freely reversible Mg2+-dependent conversion
-
-
r
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
equilibrium lies far in direction of IMP formation
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
2 assay methods
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
6-oxopurine salvage pathway reaction
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
6-oxopurine salvage pathway reaction
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
binding mechanism and structure of IMP occupying the diphosphate site, overview
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
hypoxanthine is the preferred substrate
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
unlike the hypoxanthine-guanine phosphoribosyltransferase from other sources this enzyme binds hypoxanthine 67-times less effectively than guanine and 4-times less effectively than xanthine
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
phosphoribosyltransferases for hypoxanthine and guanine are separate enzymes, and catalyse the 2 reactions with different specificities
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
binds hypoxanthine 67-times less effectively than guanine and 4-times less effectively than xanthine
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
no activity with hypoxanthine
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
equilibrium lies far in direction of IMP formation
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
salvage synthesis
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
wild-type enzyme, no activity with mutant F36L
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
wild-type and chimeric mutant enzyme
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
the enzyme is involved in the purine salvage pathway
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
wild-type and chimeric mutant enzyme
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
a freely reversible Mg2+-dependent conversion
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
hypoxanthine and guanine preferred substrates, continuous spectrophotometric enzyme assay, pH 7.5, 12 mM MgCl2, 40-70°C, 30 sec
Kd(diphosphate): 4.7 +/-0.1 mM, revealed by quenching of intrinsic fluorescence of the enzyme upon diphosphate-binding
-
ir
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
phosphoribosyltransferases for hypoxanthine and guanine are separate enzymes, and catalyse the 2 reactions with different specificities
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
best substrate
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
best substrate
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
best substrate
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
Thermus thermophilus HB8 / ATCC 27634 / DSM 579
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
most effective substrate
diphosphate is bound by Thr47
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
IMP + diphosphate
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
-
?
IMP + diphosphate
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
-
?
IMP + diphosphate
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
?
IMP + diphosphate
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
r
IMP + diphosphate
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
r
IMP + diphosphate
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
-
r
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
? + diphosphate
-
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
? + diphosphate
wild-type and chimeric mutant enzyme
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
? + diphosphate
-
-
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
? + diphosphate
-
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
? + diphosphate
wild-type and chimeric mutant enzyme
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
xanthosine 5'-phosphate + diphosphate
mutant F36L, no activity with the wild-type enzyme
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
xanthosine 5'-phosphate + diphosphate
-
low activity
-
-
r
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
xanthosine 5'-phosphate + diphosphate
-
wild-type enzyme
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
no activity
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
-
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
-
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
no activity
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
-
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
no activity
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
recombinant chimeric mutant DS1
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
wild-type human enzyme does not accept xanthine as substrate, mutant F36L does catalyze the conversion of xanthine to XMP with a kcat much lower than those of hypoxanthine and guanine
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
-
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
-
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
-
-
r
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
recombinant chimeric mutant DS1
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
the enzyme also performs the reaction of xanthine phosphoribosyltransferase, EC 2.4.2.22
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
reaction of EC 2.4.2.22
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
reaction of EC 2.4.2.22
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
low catalytic efficiency (kcat/KM), xanthine is not preferred but a usable substrate
-
-
ir
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
no activity
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
-
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
poor substrate
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
-
-
r
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
-
-
r
additional information
?
-
-
no substrates: 5-formamido-4-imidazolecarboxamide, uric acid, 8-azaguanine, 2,6-diaminopurine, orotic acid, phosphate
-
-
?
additional information
?
-
-
the conformation of the flexible loop, containing a 3-10 helix and a unique double serine repeat, is important for substrate binding and activation of the enzyme
-
-
?
additional information
?
-
-
no incorporation of xanthine in vivo
-
-
?
additional information
?
-
-
salvage incorporation of exogenous purine nucleotides, no de novo synthesis
-
-
?
additional information
?
-
-
enzyme is essential for salvaging exogenous purine bases
-
-
?
additional information
?
-
hypoxanthine phosphoribosyltransferase (EcHPRT) has a strong preference for hypoxanthine as the base substrate
-
-
-
additional information
?
-
-
dynamic and conformational properties of purified enzyme alone, in complex with GMP and Mg2+, and in equilibration mixture of enzyme with IMP, Mg2+/diphosphate and hypoxanthine, Mg2+/5-phosphoribosyl 1-diphosphate, and in transition-state analogue complex of enzyme, immucillin-GP and Mg2+/diphosphate
-
-
?
additional information
?
-
-
a mentally retarded child and its asymptomatic uncle have a partial enzyme deficiency, homozygous, while mother and grandmother are heterozygous and not enzyme-deficient
-
-
?
additional information
?
-
-
locus of Lesch-Nyhan syndrome, activator of the prodrugs 6-mercaptopurine and allopurinol
-
-
?
additional information
?
-
-
locus of Lesch-Nyhan syndrome, activator of the prodrugs 6-mercaptopurine and allopurinol
-
-
?
additional information
?
-
-
substrate binding induces conformational changes required for catalysis
-
-
?
additional information
?
-
the flexibilty of loop IV can influence the substrate specificity
-
-
?
additional information
?
-
-
the flexibilty of loop IV can influence the substrate specificity
-
-
?
additional information
?
-
-
enzyme-deficiency is involved in development of gout
-
-
?
additional information
?
-
-
the enzyme is organized in a branched bi-enzyme system with xanthine oxidase, EC 1.17.3.2
-
-
?
additional information
?
-
-
substrate binding structure involving residue K68 at the AB-dimer interface and residues V96 and D97 of the opposing subunit, overview. Residues E133 and D137 block the binding of 5-phospho-alpha-D-ribose 1-diphosphate, mechanism, overview
-
-
?
additional information
?
-
the binding site for the 5'-phosphate is located at residues 132-141
-
-
?
additional information
?
-
-
the binding site for the 5'-phosphate is located at residues 132-141
-
-
?
additional information
?
-
The substrates bind in a functionally ordered fashion, with 5-phospho-alpha-D-ribose 1-diphosphate binding first in the forward direction and IMP or GMP first in the reverse reaction, transition state structure and 5'-phosphate binding structure on HGPRT, overview
-
-
?
additional information
?
-
-
salvage incorporation of exogenous purine nucleotides, no de novo synthesis
-
-
?
additional information
?
-
salvage incorporation of exogenous purine nucleotides, no de novo synthesis
-
-
?
additional information
?
-
-
salvage incorporation of exogenous purine nucleotides, no de novo synthesis
-
-
?
additional information
?
-
enzyme is essential for salvaging exogenous purine bases
-
-
?
additional information
?
-
-
enzyme is essential for salvaging exogenous purine bases
-
-
?
additional information
?
-
-
the enzyme activity is regulated by stabilization and destabilization of the enzyme through release or binding of product and substrates, overview
-
-
?
additional information
?
-
-
the purified recombinant enzyme shows very low activity
-
-
?
additional information
?
-
-
the parasite depends on the human host purine salvage pathway enzyme hypoxanthine guanine xanthine phosphoribosyltransferase for survival, because it does not have a de novo pathway for synthesis of nucleotides on its own
-
-
?
additional information
?
-
-
the binding site for the 5'-phosphate is located at residues 132-141
-
-
?
additional information
?
-
-
no formation of PRPP and 6-oxopurine by pyrophosphorylysis due to disability of binding to nucleotides IMP, GMP, XMP at 40-70°C and substrate concentrations of up to 0.5 mM
-
-
?
additional information
?
-
purine nucleotide synthesis using TthAPRT and TthHPRT (EC 2.4.2.8). No activity with 2-chloroadenine, 2-fluoroadenine, thymine, 1,2,4-triazole-3-carboxamide, and 1,2,4-triazole-3-carboxy-N-methylamide
-
-
-
additional information
?
-
purine nucleotide synthesis using TthAPRT and TthHPRT (EC 2.4.2.8). No activity with 2-chloroadenine, 2-fluoroadenine, thymine, 1,2,4-triazole-3-carboxamide, and 1,2,4-triazole-3-carboxy-N-methylamide
-
-
-
additional information
?
-
purine nucleotide synthesis using TthAPRT and TthHPRT (EC 2.4.2.8). No activity with 2-chloroadenine, 2-fluoroadenine, thymine, 1,2,4-triazole-3-carboxamide, and 1,2,4-triazole-3-carboxy-N-methylamide
-
-
-
additional information
?
-
-
salvage incorporation of exogenous purine nucleotides, no de novo synthesis
-
-
?
additional information
?
-
-
the two isozymes exhibit similar substrate specificity, kinetic characteristics, and temporal expression patterns, overview
-
-
?
additional information
?
-
-
salvage incorporation of exogenous purine nucleotides, no de novo synthesis
-
-
?
additional information
?
-
-
enzyme is essential for salvaging exogenous purine bases
-
-
?
additional information
?
-
xanthine is a poor substrate
-
-
-
additional information
?
-
-
forward reaction: transfer of the phosphoribosyl group to N9 position of 6-oxopurines
-
-
?
additional information
?
-
-
salvage incorporation of exogenous purine nucleotides, no de novo synthesis
-
-
?
additional information
?
-
-
formation of dead-end complexes with purine substrates and diphosphate
-
-
?
additional information
?
-
-
L67 side chain participates in hydrophobic interactions between dimer subunits important for the proper positioning of main chain atoms that influence enzyme chemistry and the binding of 5-phospho-alpha-D-ribose 1-diphosphate, diphosphate, and hypoxanthine, residue 69 needs to be small like Gly, which is found there, to avoid sterical interference with binding of 5-phospho-alpha-D-ribose 1-diphosphate and diphosphate as well as the positioning of a metal ion
-
-
?
additional information
?
-
ZgHGPRT/AMPK is a bifunctional enzyme, which acts as phosphoribosyltransferase or adenylate kinase depending upon the nature of the substrate. Substrate specificity, overview
-
-
-
additional information
?
-
-
ZgHGPRT/AMPK is a bifunctional enzyme, which acts as phosphoribosyltransferase or adenylate kinase depending upon the nature of the substrate. Substrate specificity, overview
-
-
-
additional information
?
-
ZgHGPRT/AMPK is a bifunctional enzyme, which acts as phosphoribosyltransferase or adenylate kinase depending upon the nature of the substrate. Substrate specificity, overview
-
-
-
additional information
?
-
ZgHGPRT/AMPK is a bifunctional enzyme, which acts as phosphoribosyltransferase or adenylate kinase depending upon the nature of the substrate. Substrate specificity, overview
-
-
-
additional information
?
-
ZgHGPRT/AMPK is a bifunctional enzyme, which acts as phosphoribosyltransferase or adenylate kinase depending upon the nature of the substrate. Substrate specificity, overview
-
-
-
additional information
?
-
ZgHGPRT/AMPK is a bifunctional enzyme, which acts as phosphoribosyltransferase or adenylate kinase depending upon the nature of the substrate. Substrate specificity, overview
-
-
-
additional information
?
-
ZgHGPRT/AMPK is a bifunctional enzyme, which acts as phosphoribosyltransferase or adenylate kinase depending upon the nature of the substrate. Substrate specificity, overview
-
-
-
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
NATURAL SUBSTRATE
NATURAL PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate)
(Substrate)
LITERATURE
(Substrate)
(Substrate)
COMMENTARY
(Product)
(Product)
LITERATURE
(Product)
(Product)
REVERSIBILITY
r=reversible
ir=irreversible
?=not specified
r=reversible
ir=irreversible
?=not specified
XMP + diphosphate
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
r
GMP + diphosphate
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
?
GMP + diphosphate
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
r
GMP + diphosphate
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
r
GMP + diphosphate
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
6-oxopurine salvage pathway reaction
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
salvage synthesis
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
r
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
guanosine + 5-phospho-alpha-D-ribose 1-diphosphate
GMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
6-oxopurine salvage pathway reaction
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
6-oxopurine salvage pathway reaction
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
salvage synthesis
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
r
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
the enzyme is involved in the purine salvage pathway
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
IMP + diphosphate
-
-
-
?
IMP + diphosphate
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
?
IMP + diphosphate
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
r
IMP + diphosphate
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
r
IMP + diphosphate
hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate
-
-
-
-
r
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
? + diphosphate
-
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
? + diphosphate
-
-
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
? + diphosphate
-
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
xanthosine 5'-phosphate + diphosphate
mutant F36L, no activity with the wild-type enzyme
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
xanthosine 5'-phosphate + diphosphate
-
low activity
-
-
r
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
xanthosine 5'-phosphate + diphosphate
-
wild-type enzyme
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
-
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
reaction of EC 2.4.2.22
-
-
?
xanthine + 5-phospho-alpha-D-ribose 1-diphosphate
XMP + diphosphate
-
reaction of EC 2.4.2.22
-
-
?
additional information
?
-
-
no incorporation of xanthine in vivo
-
-
?
additional information
?
-
-
salvage incorporation of exogenous purine nucleotides, no de novo synthesis
-
-
?
additional information
?
-
-
enzyme is essential for salvaging exogenous purine bases
-
-
?
additional information
?
-
-
locus of Lesch-Nyhan syndrome, activator of the prodrugs 6-mercaptopurine and allopurinol
-
-
?
additional information
?
-
-
locus of Lesch-Nyhan syndrome, activator of the prodrugs 6-mercaptopurine and allopurinol
-
-
?
additional information
?
-
-
enzyme-deficiency is involved in development of gout
-
-
?
additional information
?
-
-
the enzyme is organized in a branched bi-enzyme system with xanthine oxidase, EC 1.17.3.2
-
-
?
additional information
?
-
-
salvage incorporation of exogenous purine nucleotides, no de novo synthesis
-
-
?
additional information
?
-
salvage incorporation of exogenous purine nucleotides, no de novo synthesis
-
-
?
additional information
?
-
-
salvage incorporation of exogenous purine nucleotides, no de novo synthesis
-
-
?
additional information
?
-
enzyme is essential for salvaging exogenous purine bases
-
-
?
additional information
?
-
-
enzyme is essential for salvaging exogenous purine bases
-
-
?
additional information
?
-
-
the enzyme activity is regulated by stabilization and destabilization of the enzyme through release or binding of product and substrates, overview
-
-
?
additional information
?
-
-
the parasite depends on the human host purine salvage pathway enzyme hypoxanthine guanine xanthine phosphoribosyltransferase for survival, because it does not have a de novo pathway for synthesis of nucleotides on its own
-
-
?
additional information
?
-
-
salvage incorporation of exogenous purine nucleotides, no de novo synthesis
-
-
?
additional information
?
-
-
salvage incorporation of exogenous purine nucleotides, no de novo synthesis
-
-
?
additional information
?
-
-
enzyme is essential for salvaging exogenous purine bases
-
-
?
additional information
?
-
-
salvage incorporation of exogenous purine nucleotides, no de novo synthesis
-
-
?
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METALS and IONS
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
Mg2+
Mn2+
additional information
Mg2+
-
required for binding of 5-phospho-alpha-D-ribose 1-diphosphate, binding via side chains of Glu101 and Asp102 and water molecules in the apoenzyme, binding site structure
Mg2+
dependent on, binding structures in presence of different inhibitors, overview
Mg2+
dependent on. Phosphate alone cannot activate the enzyme, magnesium ions are also required
Mg2+
-
absolute requirement for Mg2+ or Mn2+
Mg2+
the presence of magnesium ions promotes the proper spatial orientation of the substrate
Mn2+
-
absolute requirement for Mg2+ or Mn2+
additional information
the enzyme is dependent on divalent cations
additional information
-
the enzyme is dependent on divalent cations
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
INHIBITOR
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
(2-[(2,3-dihydroxypropyl)[2-(6-oxo-1,6-dihydro-9H-purin-9-yl)ethyl]amino]ethyl)phosphonic acid
-
(2-[(3R,4R)-3-(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)-4-[(2R)-2-hydroxy-2-phosphonoethoxy]pyrrolidin-1-yl]-2-oxoethyl)phosphonic acid
(2-[3-(8-bromoguanin-9-yl)-2-(2-(bishydroxyphosphoryl)-ethoxy)propoxy]ethyl)phosphonic acid
(2-[[(3R,4R)-4-(6-oxo-1,6-dihydro-9H-purin-9-yl)-1-(phosphonoacetyl)pyrrolidin-3-yl]oxy]ethyl)phosphonic acid
(2-[[2-(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)ethyl][2-(2-phosphonoethoxy)ethyl]amino]ethyl)phosphonic acid
-
(3-hydroxy-2-[[([4-hydroxy-5H-pyrrolo[3,2-d]pyrimidin-7-yl]methyl)amino]methyl]propyl)phosphonic acid
(3-[[(4-oxo-4,5-dihydro-3H-pyrrolo[3,2-d]pyrimidin-7-yl)methyl]amino]propyl)phosphonic acid
-
competitive. 466fold lower affinity for human enzyme. Treatment of cultured parasites with the bis-pavalate of the inhibitor as a prodrug inhbits growth with an IC50 of 45 microM
([2-[(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)methyl]-3-(2-phosphonoethoxy)propoxy]methyl)phosphonic acid
([2-[(6-oxo-1,6-dihydro-9H-purin-9-yl)methyl]-3-(2-phosphonoethoxy)propoxy]methyl)phosphonic acid
([3-(7-deazahypoxanthine-9-yl)-2-((2-phosphonoethoxy)methyl)propoxy]methyl)phosphonic acid
([3-(8-bromohypoxanthine-9-yl)-2-((2-phosphonoethoxy)methyl)propoxy]methyl)phosphonic acid
2-((2,3-dihydroxypropyl)(2-(hypoxanthin-9-yl)ethyl)-amino)ethyl phosphonate
weak inhibition
2-((2-(guanin-9-yl)ethyl)(2-((2-hydroxyethyl)((2-phosphonoethyl)amino)ethyl)amino)ethyl)phosphonic acid
-
2-(2-((2-(hypoxanthine-9-yl)ethyl)((2-phosphonoethyl)amino)ethyl)((2-phosphonoethyl)amino)ethyl)phosphonic acid
-
2-([3-(guanin-9-yl)-2-(2-bis(hydroxyphosphoryl)ethoxy)propoxy]ethyl)phosphonic acid
-
4-(2-methyl-4-oxo-(3H) quinazolin-3-yl)-benzoic acid (4-formyl-benzylidene) hydrazide
-
78.12% inhibition at 0.25 mg/ml
4-(2-methyl-6,8-dibromo-4-oxo-(3H)quinazolin-3-yl)-benzoic acid (4-formyl-benzylidene) hydrazide
-
79.07% inhibition at 0.25 mg/ml
4-(2-methyl-6-bromo-4-oxo-(3H) quinazolin-3-yl)-benzoic acid (4-formyl-benzylidene) hydrazide
-
77.06% inhibition at 0.25 mg/ml
4-(2-phenyl-4-oxo-(3H) quinazolin-3-yl)-benzoic acid (4-formyl-benzylidene) hydrazide
-
79.42% inhibition at 0.25 mg/ml
4-(2-phenyl-6,8-dibromo-4-oxo-(3H)quinazolin-3-yl)-benzoic acid (4-formyl-benzylidene) hydrazide
-
79.71% inhibition at 0.25 mg/ml
4-(2-phenyl-6-bromo-4-oxo-(3H) quinazolin-3-yl)-benzoic acid (4-formyl-benzylidene) hydrazide
-
79.55% inhibition at 0.25 mg/ml
6-methylheptyl hydrogen {[2-(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)ethoxy]methyl}phosphonate
9-[(N-phosphonoethyl-N-phosphonoethoxyethyl)-2-aminoethyl]-hypoxanthine
-
9-[(N-phosphonoethyl-N-phosphonomethoxyethyl)-2-aminoethyl]hypoxanthine
-
diethyl (2S,15S)-2,15-dibenzyl-4,13-bis[[(2S)-1-ethoxy-1-oxo-3-phenylpropan-2-yl]amino]-4,13-dioxo-8-[(4-oxo-3,4-dihydro-7H-pyrrolo[2,3-d]pyrimidin-7-yl)methyl]-6,10-dioxa-3,14-diaza-4lambda5,13lambda5-diphosphahexadecane-1,16-dioate
diethyl (2S,15S)-2,15-dibenzyl-4,13-bis[[(2S)-1-ethoxy-1-oxo-3-phenylpropan-2-yl]amino]-4,13-dioxo-8-[(6-oxo-1,6-dihydro-9H-purin-9-yl)methyl]-6,10-dioxa-3,14-diaza-4lambda5,13lambda5-diphosphahexadecane-1,16-dioate
diethyl (2S,15S)-2,15-dibenzyl-8-[(8-bromo-6-oxo-1,6-dihydro-9H-purin-9-yl)methyl]-4,13-bis[[(2S)-1-ethoxy-1-oxo-3-phenylpropan-2-yl]amino]-4,13-dioxo-6,10-dioxa-3,14-diaza-4lambda5,13lambda5-diphosphahexadecane-1,16-dioate
diethyl (2S,15S)-4,13-bis[[(2S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl]amino]-4,13-dioxo-8-[(6-oxo-1,6-dihydro-9H-purin-9-yl)methyl]-2,15-bis(2-phenylethyl)-6,10-dioxa-3,14-diaza-4lambda5,13lambda5-diphosphahexadecane-1,16-dioate
diethyl (2S,15S)-8-[(2-amino-4-oxo-3,4-dihydro-7H-pyrrolo[2,3-d]pyrimidin-7-yl)methyl]-2,15-dibenzyl-4,13-bis[[(2S)-1-ethoxy-1-oxo-3-phenylpropan-2-yl]amino]-4,13-dioxo-6,10-dioxa-3,14-diaza-4lambda5,13lambda5-diphosphahexadecane-1,16-dioate
diethyl (2S,15S)-8-[(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)methyl]-2,15-dibenzyl-4,13-bis[[(2S)-1-ethoxy-1-oxo-3-phenylpropan-2-yl]amino]-4,13-dioxo-6,10-dioxa-3,14-diaza-4lambda5,13lambda5-diphosphahexadecane-1,16-dioate
diethyl (2S,15S)-8-[(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)methyl]-2,15-dibenzyl-4,13-bis[[(2S)-1-ethoxy-1-oxo-3-phenylpropan-2-yl]amino]-4,13-dioxo-7,10-dioxa-3,14-diaza-4lambda5,13lambda5-diphosphahexadecane-1,16-dioate
diethyl (2S,15S)-8-[(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)methyl]-4,13-bis[[(2S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl]amino]-4,13-dioxo-2,15-bis(2-phenylethyl)-6,10-dioxa-3,14-diaza-4lambda5,13lambda5-diphosphahexadecane-1,16-dioate
diethyl (2S,15S)-8-[(2-amino-8-bromo-6-oxo-1,6-dihydro-9H-purin-9-yl)methyl]-2,15-dibenzyl-4,13-bis[[(2S)-1-ethoxy-1-oxo-3-phenylpropan-2-yl]amino]-4,13-dioxo-7,10-dioxa-3,14-diaza-4lambda5,13lambda5-diphosphahexadecane-1,16-dioate
diethyl dicarbonate
-
alkylation of Arg155, complete inactivation at pH 9.0, pH dependent
immucillin-G 5'-phosphate
active site contacts in the HGPRT/immucillin-G 5'-phosphate/diphosphate complex, overview
immucillin-H
-
transition state analogue, binds tightly to the active site, inhibition mechanism and kinetics
Mg2+
-
inhibitory effects are noncompetitive against 5-phosphoribose 1-diphosphate
Phenylglyoxal
-
irreversible, complete inactivation, alkylation of Arg155, GMP protects, no alkylation of mutant R155K
propan-2-yl hydrogen {[2-(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)ethoxy]methyl}phosphonate
Tetranitromethane
-
complete inactivation at pH 9.0, pH dependent, modifies Tyr96 in the active site
[(+/-)-2(R/S)-3-hydroxy-2-[([4-hydroxy-5H-pyrrolo[3,2-d]pyrimidin-7-yl]methyl)amino]propoxy]phosphonic acid
[(+/-)-2(R/S)-[([2-chloro-4-hydroxy-5H-pyrrolo[3,2-d]pyrimidin-7-yl]methyl)amino]-3-hydroxypropoxy]phosphonic acid
[(1S)-1-hydroxy-2-[[(3R,4R)-4-(6-oxo-1,6-dihydro-9H-purin-9-yl)-1-(phosphonoacetyl)pyrrolidin-3-yl]oxy]ethyl]phosphonic acid
[(2R)-2-[([2-amino-4-hydroxy-5H-pyrrolo[3,2-d]pyrimidin-7-yl]methyl)amino]-3-hydroxypropoxy]phosphonic acid
[(2R)-3-hydroxy-2-[([4-hydroxy-5H-pyrrolo[3,2-d]pyrimidin-7-yl]methyl)amino]propoxy]phosphonic acid
[(2S)-2-[([2-amino-4-hydroxy-5H-pyrrolo[3,2-d]pyrimidin-7-yl]methyl)amino]-3-hydroxypropoxy]phosphonic acid
[(2S,3R)-2,4-dihydroxy-3-[([4-hydroxy-5H-pyrrolo[3,2-d]pyrimidin-7-yl]methyl)amino]butoxy]phosphonic acid
[(3R)-4-hydroxy-3-[([4-hydroxy-5H-pyrrolo[3,2-d]pyrimidin-7-yl]methyl)amino]butyl]phosphonic acid
[(3S)-1,1-difluoro-4-hydroxy-3-[([4-hydroxy-5H-pyrrolo[3,2-d]pyrimidin-7-yl]methyl)amino]butyl]phosphonic acid
[(3S)-3-[([2-amino-4-hydroxy-5H-pyrrolo[3,2-d]pyrimidin-7-yl]methyl)amino]-1,1-difluoro-4-hydroxybutyl]phosphonic acid
[(3S)-4-hydroxy-3-[([4-hydroxy-5H-pyrrolo[3,2-d]pyrimidin-7-yl]methyl)amino]butyl]phosphonic acid
[(3S)-4-hydroxy-3-[[(4-oxo-4,5-dihydro-3H-pyrrolo[3,2-d]pyrimidin-7-yl)methyl]amino]butyl]phosphonic acid
-
competitive. 592fold lower affinity for human enzyme
[2-([2-(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)ethyl][2-[(2-hydroxyethyl)(2-phosphonoethyl)amino]ethyl]amino)ethyl]phosphonic acid
-
[2-hydroxy-3-[([4-hydroxy-5H-pyrrolo[3,2-d]pyrimidin-7-yl]methyl)amino]propyl] phosphonic acid
[2-[(2-hydroxyethyl)(2-[[2-(6-oxo-1,6-dihydro-9H-purin-9-yl)ethyl](2-phosphonoethyl)amino]ethyl)amino]ethyl]phosphonic acid
-
[3-(6-oxo-1,6-dihydro-9H-purin-9-yl)propyl]phosphonic acid
a competitive inhibitor
[3-hydroxy-2-[([4-hydroxy-5H-pyrrolo[3,2-d]pyrimidin-7-yl]methyl)amino]-2-(hydroxymethyl)propoxy]phosphonic acid
[3R,4R]-4-guanin-9-yl-3-((S)-2-hydroxy-2-phosphonoethyl)oxy-1-N-(phosphonopropionyl)pyrrolidine
[4-(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)butyl]phosphonic acid
a competitive inhibitor
[4-(6-oxo-1,6-dihydro-9H-purin-9-yl)butyl]phosphonic acid
a competitive inhibitor, enzyme binding structure analysis, crystal structure, overview. In the complex with the inhibitor there is no association with K145 located away from the purine base and the base itself rotated slightly compared to when GMP is bound, such that the distance between the 6-oxo group and this lysine is 3.9 A at its closest approach. A sulfate ion is also observed in the active site, and is located in the diphosphate binding pocket where it interacts with the amide nitrogen of G55, the side-chain of R179 and one magnesium ion. A second magnesium is located between E113 and D114, which is a Mg2+ binding site in the 6-oxopurine PRTs
[5-(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)pentyl]phosphonic acid
a competitive inhibitor
[5-(6-oxo-1,6-dihydro-9H-purin-9-yl)pentyl]phosphonic acid
a competitive inhibitor, enzyme binding structure analysis, crystal structure, overview
[6-(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)hexyl]phosphonic acid
a competitive inhibitor, enzyme binding structure analysis, crystal structure, overview
[6-(6-oxo-1,6-dihydro-9H-purin-9-yl)hexyl]phosphonic acid
a competitive inhibitor
[[2-[(6-oxo-1,6-dihydro-9H-purin-9-yl)methyl]propane-1,3-diyl]bis(oxymethylene)]bis(phosphonic acid)
[[[(4-oxo-4,5-dihydro-3H-pyrrolo[3,2-d]pyrimidin-7-yl)methyl]azanediyl]di(propane-3,1-diyl)]bis(phosphonic acid)
-
(1S)-1-(9-deazaguanin-9-yl)-1,4-dideoxy-1,4-imino-D-ribitol 5-phosphate
-
(1S)-1-(9-deazaguanin-9-yl)-1,4-dideoxy-1,4-imino-D-ribitol 5-phosphate
-
-
(1S)-1-(9-deazahypoxanthin-9-yl)-1,4-dideoxy-1,4-imino-D-ribitol 5-phosphate
-
(1S)-1-(9-deazahypoxanthin-9-yl)-1,4-dideoxy-1,4-imino-D-ribitol 5-phosphate
-
-
(2-[(3R,4R)-3-(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)-4-[(2R)-2-hydroxy-2-phosphonoethoxy]pyrrolidin-1-yl]-2-oxoethyl)phosphonic acid
enzyme-bound crystal structure analysis
(2-[(3R,4R)-3-(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)-4-[(2R)-2-hydroxy-2-phosphonoethoxy]pyrrolidin-1-yl]-2-oxoethyl)phosphonic acid
enzyme-bound crystal structure analysis; enzyme-bound crystal structure analysis
(2-[3-(8-bromoguanin-9-yl)-2-(2-(bishydroxyphosphoryl)-ethoxy)propoxy]ethyl)phosphonic acid
-
(2-[3-(8-bromoguanin-9-yl)-2-(2-(bishydroxyphosphoryl)-ethoxy)propoxy]ethyl)phosphonic acid
-
(2-[[(3R,4R)-4-(6-oxo-1,6-dihydro-9H-purin-9-yl)-1-(phosphonoacetyl)pyrrolidin-3-yl]oxy]ethyl)phosphonic acid
-
(2-[[(3R,4R)-4-(6-oxo-1,6-dihydro-9H-purin-9-yl)-1-(phosphonoacetyl)pyrrolidin-3-yl]oxy]ethyl)phosphonic acid
-
(3-hydroxy-2-[[([4-hydroxy-5H-pyrrolo[3,2-d]pyrimidin-7-yl]methyl)amino]methyl]propyl)phosphonic acid
-
-
(3-hydroxy-2-[[([4-hydroxy-5H-pyrrolo[3,2-d]pyrimidin-7-yl]methyl)amino]methyl]propyl)phosphonic acid
-
(R)-9-[3-hydroxy-2-(phosphonomethoxy)propyl]guanine
is toxic to cells and arrests cell growth
(R)-9-[3-hydroxy-2-(phosphonomethoxy)propyl]guanine
-
is toxic to cells and arrests cell growth
(S)-3-(guanin-9-yl)-pyrrolidin-N-ylacetylphosphonic acid
-
(S)-9-[3-hydroxy-2-(phosphonomethoxy)propyl]guanine
is toxic to cells and arrests cell growth
(S)-9-[3-hydroxy-2-(phosphonomethoxy)propyl]guanine
-
is toxic to cells and arrests cell growth
([2-[(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)methyl]-3-(2-phosphonoethoxy)propoxy]methyl)phosphonic acid
-
([2-[(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)methyl]-3-(2-phosphonoethoxy)propoxy]methyl)phosphonic acid
-
([2-[(6-oxo-1,6-dihydro-9H-purin-9-yl)methyl]-3-(2-phosphonoethoxy)propoxy]methyl)phosphonic acid
-
([2-[(6-oxo-1,6-dihydro-9H-purin-9-yl)methyl]-3-(2-phosphonoethoxy)propoxy]methyl)phosphonic acid
-
([3-(7-deazaguanine-9-yl)-2-((2-phosphonoethoxy)methyl)propoxy]methyl)phosphonic acid
sodium salt
([3-(7-deazaguanine-9-yl)-2-((2-phosphonoethoxy)methyl)propoxy]methyl)phosphonic acid
sodium salt
([3-(7-deazahypoxanthine-9-yl)-2-((2-phosphonoethoxy)methyl)propoxy]methyl)phosphonic acid
sodium salt
([3-(7-deazahypoxanthine-9-yl)-2-((2-phosphonoethoxy)methyl)propoxy]methyl)phosphonic acid
sodium salt
([3-(8-bromoguanine-9-yl)-2-((2-phosphonoethoxy)methyl)propoxy]methyl)phosphonic acid
sodium salt
([3-(8-bromoguanine-9-yl)-2-((2-phosphonoethoxy)methyl)propoxy]methyl)phosphonic acid
sodium salt
([3-(8-bromohypoxanthine-9-yl)-2-((2-phosphonoethoxy)methyl)propoxy]methyl)phosphonic acid
sodium salt
([3-(8-bromohypoxanthine-9-yl)-2-((2-phosphonoethoxy)methyl)propoxy]methyl)phosphonic acid
sodium salt
([3-(guanine-9-yl)-2-((2-phosphonoethoxy)-methyl)propoxy]methyl)phosphonic acid
sodium salt
([3-(guanine-9-yl)-2-((2-phosphonoethoxy)-methyl)propoxy]methyl)phosphonic acid