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Protein

Hypoxanthine-guanine phosphoribosyltransferase

Gene

HGPRT

Organism
Trypanosoma brucei brucei
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

Functioni

Converts guanine to guanosine monophosphate, and hypoxanthine to inosine monophosphate. Transfers the 5-phosphoribosyl group from 5-phosphoribosylpyrophosphate onto the purine. Plays a central role in the generation of purine nucleotides through the purine salvage pathway (By similarity).By similarity

Catalytic activityi

IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate.
GMP + diphosphate = guanine + 5-phospho-alpha-D-ribose 1-diphosphate.

Cofactori

Mg2+By similarityNote: Binds 2 magnesium ions per subunit. The magnesium ions are essentially bound to the substrate and have few direct interactions with the protein.By similarity

Pathway:iIMP biosynthesis via salvage pathway

This protein is involved in step 1 of the subpathway that synthesizes IMP from hypoxanthine.
Proteins known to be involved in this subpathway in this organism are:
  1. Hypoxanthine-guanine phosphoribosyltransferase (HGPRT)
This subpathway is part of the pathway IMP biosynthesis via salvage pathway, which is itself part of Purine metabolism.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes IMP from hypoxanthine, the pathway IMP biosynthesis via salvage pathway and in Purine metabolism.

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Binding sitei54 – 541GMPBy similarity
Active sitei117 – 1171Proton acceptorBy similarity
Binding sitei145 – 1451GMPBy similarity
Metal bindingi173 – 1731MagnesiumBy similarity
Binding sitei173 – 1731GMP; via carbonyl oxygenBy similarity

Regions

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Nucleotide bindingi113 – 1219GMPBy similarity

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Glycosyltransferase, Transferase

Keywords - Biological processi

Purine salvage

Keywords - Ligandi

Magnesium, Metal-binding, Nucleotide-binding

Enzyme and pathway databases

BioCyciMetaCyc:MONOMER-15863.
UniPathwayiUPA00591; UER00648.

Names & Taxonomyi

Protein namesi
Recommended name:
Hypoxanthine-guanine phosphoribosyltransferase (EC:2.4.2.8)
Short name:
HGPRT
Short name:
HGPRTase
Gene namesi
Name:HGPRT
OrganismiTrypanosoma brucei brucei
Taxonomic identifieri5702 [NCBI]
Taxonomic lineageiEukaryotaEuglenozoaKinetoplastidaTrypanosomatidaeTrypanosoma

Subcellular locationi

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Cytoplasm

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 210210Hypoxanthine-guanine phosphoribosyltransferasePRO_0000139596Add
BLAST

Proteomic databases

PRIDEiQ07010.

Interactioni

Structurei

3D structure databases

ProteinModelPortaliQ07010.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Family and domain databases

Gene3Di3.40.50.2020. 1 hit.
InterProiIPR005904. Hxn_phspho_trans.
IPR000836. PRibTrfase_dom.
IPR029057. PRTase-like.
[Graphical view]
PfamiPF00156. Pribosyltran. 1 hit.
[Graphical view]
SUPFAMiSSF53271. SSF53271. 1 hit.
TIGRFAMsiTIGR01203. HGPRTase. 1 hit.
PROSITEiPS00103. PUR_PYR_PR_TRANSFER. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Q07010-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MEPACKYDFA TSVLFTEAEL HTRMRGVAQR IADDYSNCNL KPLENPLVIV
60 70 80 90 100
SVLKGSFVFT ADMVRILGDF GVPTRVEFLR ASSYGHDTKS CGRVDVKADG
110 120 130 140 150
LCDIRGKHVL VLEDILDTAL TLREVVDSLK KSEPASIKTL VAIDKPGGRK
160 170 180 190 200
IPFTAEYVVA DVPNVFVVGY GLDYDQSYRE VRDVVILKPS VYETWGKELE
210
RRKAAGEAKR
Length:210
Mass (Da):23,360
Last modified:June 1, 1994 - v1
Checksum:i6134FA880F40EC3D
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
L10721 Unassigned DNA. Translation: AAA16328.1.
PIRiS41631.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
L10721 Unassigned DNA. Translation: AAA16328.1.
PIRiS41631.

3D structure databases

ProteinModelPortaliQ07010.
ModBaseiSearch...
MobiDBiSearch...

Chemistry

BindingDBiQ07010.
ChEMBLiCHEMBL5069.

Proteomic databases

PRIDEiQ07010.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Enzyme and pathway databases

UniPathwayiUPA00591; UER00648.
BioCyciMetaCyc:MONOMER-15863.

Family and domain databases

Gene3Di3.40.50.2020. 1 hit.
InterProiIPR005904. Hxn_phspho_trans.
IPR000836. PRibTrfase_dom.
IPR029057. PRTase-like.
[Graphical view]
PfamiPF00156. Pribosyltran. 1 hit.
[Graphical view]
SUPFAMiSSF53271. SSF53271. 1 hit.
TIGRFAMsiTIGR01203. HGPRTase. 1 hit.
PROSITEiPS00103. PUR_PYR_PR_TRANSFER. 1 hit.
[Graphical view]
ProtoNetiSearch...

Publicationsi

  1. "Cloning and expression of the hypoxanthine-guanine phosphoribosyltransferase gene from Trypanosoma brucei."
    Allen T.E., Ullman B.
    Nucleic Acids Res. 21:5431-5438(1993) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE.

Entry informationi

Entry nameiHPRT_TRYBB
AccessioniPrimary (citable) accession number: Q07010
Entry historyi
Integrated into UniProtKB/Swiss-Prot: June 1, 1994
Last sequence update: June 1, 1994
Last modified: July 22, 2015
This is version 85 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)

Miscellaneousi

Documents

  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into Uniref entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.