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Information on EC 2.4.2.7 - adenine phosphoribosyltransferase

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EC Tree
     2 Transferases
         2.4 Glycosyltransferases
             2.4.2 Pentosyltransferases
                2.4.2.7 adenine phosphoribosyltransferase
IUBMB Comments
5-Amino-4-imidazolecarboxamide can replace adenine.
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This record set is specific for:
UNIPROT: Q967M2
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Word Map
The enzyme appears in viruses and cellular organisms
Synonyms
aprt, adenine phosphoribosyltransferase, adenine phosphoribosyl transferase, aprtase, gpt-1, adenosine phosphoribosyltransferase, amp pyrophosphorylase, haprt, aprth, aprt1, more
SYNONYM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
adenine phosphoribosylpyrophosphate transferase
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-
-
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adenosine phosphoribosyltransferase
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-
-
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adenylate pyrophosphorylase
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-
-
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adenylic pyrophosphorylase
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-
-
-
AMP pyrophosphorylase
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-
-
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AMP-pyrophosphate phosphoribosyltransferase
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-
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AMP:pyrophosphate phospho-D-ribosyltransferase
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APRT
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phosphoribosyltransferase, adenine
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-
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transphosphoribosidase
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-
-
-
additional information
structure analysis: different paths for adenine relative to other purine PRTases
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
AMP + diphosphate = adenine + 5-phospho-alpha-D-ribose 1-diphosphate
show the reaction diagram
REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
pentosyl group transfer
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-
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-
PATHWAY SOURCE
PATHWAYS
-
-, -, -, -, -
SYSTEMATIC NAME
IUBMB Comments
AMP:diphosphate phospho-D-ribosyltransferase
5-Amino-4-imidazolecarboxamide can replace adenine.
CAS REGISTRY NUMBER
COMMENTARY hide
9027-80-9
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SUBSTRATE
PRODUCT                       
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
adenine + 5-phospho-alpha-D-ribose 1-diphosphate
AMP + diphosphate
show the reaction diagram
METALS and IONS
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
INHIBITOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
diphosphate
noncompetitive against 5-phospho-alpha-D-ribose 1-diphosphate
KM VALUE [mM]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
0.143
5-phospho-alpha-D-ribose 1-diphosphate
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0.45
diphosphate
-
additional information
additional information
-
TURNOVER NUMBER [1/s]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
2.8
5-phospho-alpha-D-ribose 1-diphosphate
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0.0095
diphosphate
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Ki VALUE [mM]
INHIBITOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
0.018 - 23.5
AMP
1.79
diphosphate
versus 5-phosphoribose 1-diphosphate
SPECIFIC ACTIVITY [µmol/min/mg]
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
additional information
ORGANISM
COMMENTARY hide
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
UNIPROT
ENTRY NAME
ORGANISM
NO. OF AA
NO. OF TRANSM. HELICES
MOLECULAR WEIGHT[Da]
SOURCE
SEQUENCE
LOCALIZATION PREDICTION?
Q967M2_GIAIN
180
0
19436
TrEMBL
-
SUBUNIT
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
?
x * 20000-20370, recombinant His-tagged enzyme, SDS-PAGE and DNA sequence determination
additional information
CRYSTALLIZATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
enzyme, 10 mg/ml, in complex with 9-deazaadenine and sulfate or Mg-phosphoribosyldiphosphate, 50 mM Hepes, pH 6.0, 8 mM MgCl2, 1 mM DTT, 1:2 molar ratio of 9-deazaadenine and iminoribitol, 1 mM sodium diphosphate, after 45 min incubation preparation of crystallization drops, crystals are obtained from mother liquid 0.1 M sodium acetate, pH 4.6, 24% polyethylene glycol 4000, 0.2 M ammonium sulfate, 0.05 M urea, 18°C, X-ray diffraction structure analysis, hydrogen bond network in the complexes
PROTEIN VARIANTS
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
F25W
site-directed mutagenesis, tryptophan at the adenine binding site, kinetic constants similar to the wild-type
PURIFICATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
recombinant His-tagged enzyme from Escherichia coli
CLONED (Commentary)
ORGANISM
UNIPROT
LITERATURE
cloning and DNA sequence determination, expression in Escherichia coli BL21 cells as C-terminally His-tagged protein
REF.
AUTHORS
TITLE
JOURNAL
VOL.
PAGES
YEAR
ORGANISM (UNIPROT)
PUBMED ID
SOURCE
Sarver, A.E.; Wang, C.C.
The adenine phosphoribosyltransferase from Giardia lamblia has a unique reaction mechanism and unusual substrate binding properties
J. Biol. Chem.
277
39973-39980
2002
Giardia intestinalis (Q967M2), Giardia intestinalis
Manually annotated by BRENDA team
Shi, W.; Sarver, A.E.; Wang, C.C.; Tanaka, K.S.; Almo, S.C.; Schramm, V.L.
Closed site complexes of adenine phosphoribosyltransferase from Giardia lamblia reveal a mechanism of ribosyl migration
J. Biol. Chem.
277
39981-39988
2002
Giardia intestinalis (Q967M2), Giardia intestinalis
Manually annotated by BRENDA team