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Protein

Hypoxanthine-guanine phosphoribosyltransferase

Gene

HPRT1

Organism
Canis lupus familiaris (Dog) (Canis familiaris)
Status
Reviewed-Annotation score: Annotation score: 5 out of 5-Experimental evidence at transcript leveli

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

Pathwayi: IMP 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 (HPRT1)
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)DescriptionActionsGraphical viewLength
Binding sitei69GMPBy similarity1
Active sitei138Proton acceptorBy similarity1
Binding sitei166GMPBy similarity1
Metal bindingi194MagnesiumBy similarity1
Binding sitei194GMP; via carbonyl oxygenBy similarity1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Nucleotide bindingi134 – 142GMPBy similarity9
Nucleotide bindingi186 – 188GMPBy similarity3

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

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:HPRT1
Synonyms:HPRT
OrganismiCanis lupus familiaris (Dog) (Canis familiaris)
Taxonomic identifieri9615 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaLaurasiatheriaCarnivoraCaniformiaCanidaeCanis
Proteomesi
  • UP000002254 Componenti: Unplaced

Subcellular locationi

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Cytoplasm

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Initiator methionineiRemovedBy similarity
ChainiPRO_00001395832 – 218Hypoxanthine-guanine phosphoribosyltransferaseAdd BLAST217

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei2N-acetylalanineBy similarity1
Modified residuei103N6-acetyllysineBy similarity1
Cross-linki115Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in SUMO1)By similarity
Modified residuei142PhosphothreonineBy similarity1

Keywords - PTMi

Acetylation, Isopeptide bond, Phosphoprotein, Ubl conjugation

Proteomic databases

PaxDbiQ6WIT9.
PRIDEiQ6WIT9.

Interactioni

Subunit structurei

Homotetramer.By similarity

GO - Molecular functioni

Protein-protein interaction databases

STRINGi9615.ENSCAFP00000027831.

Structurei

3D structure databases

ProteinModelPortaliQ6WIT9.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Phylogenomic databases

eggNOGiKOG3367. Eukaryota.
COG0634. LUCA.
HOGENOMiHOG000236521.
HOVERGENiHBG000242.
InParanoidiQ6WIT9.

Family and domain databases

CDDicd06223. PRTases_typeI. 1 hit.
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.

Sequence processingi: The displayed sequence is further processed into a mature form.

Q6WIT9-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MATRSLGVVI SDDEPGYDLD LFCIPHHYAE DLEKVFIPHG LIMDRTERLA
60 70 80 90 100
RDVMKEMGGH HIVALCVLKG GYKFFADLLD YIKALNRNSD GSIPMTVDFI
110 120 130 140 150
RLKSYCNDQS TGDIKVIGGD DLSTLTGKNV LIVEDIIDTG KTMQTLLSLV
160 170 180 190 200
KEHNPKMVKV ASLLVKRTPR SVGYKPDFVG FEIPDKFVVG YALDYNEYFR
210
DLNHVCVISE TGKAKYKA
Length:218
Mass (Da):24,438
Last modified:January 23, 2007 - v3
Checksum:iE6F1CC8CC6FDF52F
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AY283372 mRNA. Translation: AAQ21102.1.
UniGeneiCfa.4551.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AY283372 mRNA. Translation: AAQ21102.1.
UniGeneiCfa.4551.

3D structure databases

ProteinModelPortaliQ6WIT9.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi9615.ENSCAFP00000027831.

Proteomic databases

PaxDbiQ6WIT9.
PRIDEiQ6WIT9.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Phylogenomic databases

eggNOGiKOG3367. Eukaryota.
COG0634. LUCA.
HOGENOMiHOG000236521.
HOVERGENiHBG000242.
InParanoidiQ6WIT9.

Enzyme and pathway databases

UniPathwayiUPA00591; UER00648.

Family and domain databases

CDDicd06223. PRTases_typeI. 1 hit.
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...

Entry informationi

Entry nameiHPRT_CANLF
AccessioniPrimary (citable) accession number: Q6WIT9
Entry historyi
Integrated into UniProtKB/Swiss-Prot: April 12, 2005
Last sequence update: January 23, 2007
Last modified: October 5, 2016
This is version 83 of the entry and version 3 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

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

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 one 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.