Reviewed, UniProtKB/Swiss-Prot Q3BCR6 (TPMT_HORSE)

Names and origin

Protein names

Recommended name:
    Thiopurine S-methyltransferase
    EC=2.1.1.67
Alternative name(s):
    Thiopurine methyltransferase

Gene names

Name:

TPMT

Organism

Equus caballus (Horse)

Taxonomic identifier

9796 [NCBI]

Taxonomic lineage

Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Laurasiatheria › Perissodactyla › Equidae › Equus

Protein attributes

Sequence length	245 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Evidence at transcript level.

General annotation (Comments)

Function	Catalyzes the S-methylation of thiopurine drugs such as 6-mercaptopurine.
Catalytic activity	S-adenosyl-L-methionine + a thiopurine = S-adenosyl-L-homocysteine + a thiopurine S-methylether.
Subunit structure	Monomer By similarity.
Subcellular location	Cytoplasm.
Sequence similarities	Belongs to the methyltransferase superfamily. TPMT family.

Ontologies

Keywords
Cellular component	Cytoplasm
Ligand	S-adenosyl-L-methionine
Molecular function	Methyltransferase Transferase
PTM	Phosphoprotein
Gene Ontology (GO)
Biological process	metabolic process Inferred from electronic annotation. Source: InterPro
Cellular component	cytoplasm Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular function	thiopurine S-methyltransferase activity Inferred from electronic annotation. Source: EC
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 245	245	Thiopurine S-methyltransferase		PRO_0000220101
Sites
	Binding site	33	1	S-adenosyl-L-methionine By similarity
	Binding site	69	1	S-adenosyl-L-methionine; via carbonyl oxygen By similarity
	Binding site	90	1	S-adenosyl-L-methionine By similarity
	Binding site	152	1	S-adenosyl-L-methionine By similarity
Amino acid modifications
	Modified residue	14	1	Phosphoserine By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q3BCR6-1 [UniParc]. Last modified November 22, 2005. Version 1. Checksum: 7CBB27DD98CB97B7	FASTA	245	28,118
	10 20 30 40 50 60 MDGTRTVLDI KEYSDSEVQK NRVLTLEEWQ GKWVTGKTIF HQEQGHQLLK KHLDAFLKGE 70 80 90 100 110 120 SGLKVFFPLC GKAVEMKWFA DRGHSVVGVE ISELGIREFF TEQNLSYSEE PIIEIPGAKV 130 140 150 160 170 180 FKSSSGNISL YCCNIFDLPR TNIGKFDRIW DRGALVAVNP GDRKRYVDIM LSLTRKGFHY 190 200 210 220 230 240 LLAVLSYDPT KHAGPPFFVS DAEVKRLFDS VCNIRCLEKV DALEERHKSW GIDYLVETLY LFTEK

References

[1]	"Thiopurine S-methyltransferase pharmacogenetics: variant allele functional and comparative genomics." Salavaggione O.E., Wang L., Wiepert M., Yee V.C., Weinshilboum R.M. Pharmacogenet. Genomics 15:801-815(2005) [PubMed: 16220112] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA].

Cross-references

Sequence databases
EMBLGenBankDDBJ	AY827076 mRNA. Translation: AAX37640.1.
RefSeq	NP_001075374.1.
UniGene	Eca.3077
3D structure databases
SMR	Q3BCR6. Positions 17-245.
ModBase	Search...
Genome annotation databases
Ensembl	ENSECAG00000013653. Equus caballus. [Contig view]
GeneID	100034066.
KEGG	ecb:100034066.
Phylogenomic databases
HOVERGEN	Q3BCR6.
Enzyme and pathway databases
BRENDA	2.1.1.67. 1464.
Family and domain databases
InterPro	IPR008854. Thiopurine_S-MeTrfase. IPR016822. Thiopurine_S-MeTrfase_sub. [Graphical view]
Pfam	PF05724. TPMT. 1 hit. [Graphical view]
PIRSF	PIRSF023956. Thiopurine_S-methyltransferase. 1 hit.
ProtoNet	Search...

Entry information

Entry name

TPMT_HORSE

Accession

Primary (citable) accession number: Q3BCR6

Entry history

Integrated into UniProtKB/Swiss-Prot:	December 20, 2005
Last sequence update:	November 22, 2005
Last modified:	June 16, 2009
This is version 25 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HPI (Human Proteome Initiative)