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Information on EC 7.3.2.1 - ABC-type phosphate transporter

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EC Tree
IUBMB Comments
An ATP-binding cassette (ABC) type transporter, characterized by the presence of two similar ATP-binding domains/proteins and two integral membrane domains/proteins. A bacterial enzyme that interacts with an extracytoplasmic substrate binding protein and mediates the high affinity uptake of phosphate anions. Unlike P-type ATPases, it does not undergo phosphorylation during the transport process.
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This record set is specific for:
UNIPROT: P25297
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Word Map
The expected taxonomic range for this enzyme is: Bacteria, Archaea, Eukaryota
Reaction Schemes
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phosphate-[phosphate-binding protein][side 1]
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[phosphate-binding protein][side 1]
Synonyms
pit-1, phosphate transporter, npt2a, pho84, anion transporter 1, pit-2, pi transporter, slc20a1, glvr-1, pstscab, more
SYNONYM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
high-affinity phosphate transporter Pho84p
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ABC phosphate transporter
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ATP phosphohydrolase (phosphate-importing)
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phosphate specific transporter
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phosphate-specific transport system
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phosphate-transporting ATPase
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Pst
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REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
hydrolysis of phosphoric acid anhydride
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PATHWAY SOURCE
PATHWAYS
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SYSTEMATIC NAME
IUBMB Comments
ATP phosphohydrolase (ABC-type, phosphate-importing)
An ATP-binding cassette (ABC) type transporter, characterized by the presence of two similar ATP-binding domains/proteins and two integral membrane domains/proteins. A bacterial enzyme that interacts with an extracytoplasmic substrate binding protein and mediates the high affinity uptake of phosphate anions. Unlike P-type ATPases, it does not undergo phosphorylation during the transport process.
CAS REGISTRY NUMBER
COMMENTARY hide
9000-83-3
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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
ATP + H2O + phosphate/out
ADP + phosphate + phosphate/in
show the reaction diagram
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?
INHIBITOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
Selenite
competitively inhibits phosphate uptake
KM VALUE [mM]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
0.02
phosphate
pH 6.0, 30°C, Vmax: 860 pmol of phosphate incorporated per min/OD650
Ki VALUE [mM]
INHIBITOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
pH OPTIMUM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
TEMPERATURE OPTIMUM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
ORGANISM
COMMENTARY hide
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
GENERAL INFORMATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
malfunction
selenite uptake is reduced in a DELTA pho84 mutant
physiological function
when cells are grown at low phosphate concentrations, the high-affinity phosphate transporter Pho84p is the major contributor to selenite uptake. Pho84p is very selective for phosphate as compared to selenite
UNIPROT
ENTRY NAME
ORGANISM
NO. OF AA
NO. OF TRANSM. HELICES
MOLECULAR WEIGHT[Da]
SOURCE
SEQUENCE
LOCALIZATION PREDICTION?
PHO84_YEAST
Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
587
0
64382
Swiss-Prot
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REF.
AUTHORS
TITLE
JOURNAL
VOL.
PAGES
YEAR
ORGANISM (UNIPROT)
PUBMED ID
SOURCE
Lazard, M.; Blanquet, S.; Fisicaro, P.; Labarraque, G.; Plateau, P.
Uptake of selenite by Saccharomyces cerevisiae involves the high- and low-affinity orthophosphate transporters
J. Biol. Chem.
285
32029-32037
2011
Saccharomyces cerevisiae (P25297), Saccharomyces cerevisiae (P25360), Saccharomyces cerevisiae (P27514), Saccharomyces cerevisiae (P39535), Saccharomyces cerevisiae
Manually annotated by BRENDA team