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Protein

S-methyl-5'-thioadenosine phosphorylase

Gene

GA18442

Organism
Drosophila pseudoobscura pseudoobscura (Fruit fly)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

Functioni

Catalyzes the reversible phosphorylation of S-methyl-5'-thioadenosine (MTA) to adenine and 5-methylthioribose-1-phosphate. Involved in the breakdown of MTA, a major by-product of polyamine biosynthesis. Responsible for the first step in the methionine salvage pathway after MTA has been generated from S-adenosylmethionine. Has broad substrate specificity with 6-aminopurine nucleosides as preferred substrates.UniRule annotation

Catalytic activityi

S-methyl-5'-thioadenosine + phosphate = adenine + S-methyl-5-thio-alpha-D-ribose 1-phosphate.UniRule annotation

Pathwayi: L-methionine biosynthesis via salvage pathway

This protein is involved in step 1 of the subpathway that synthesizes S-methyl-5-thio-alpha-D-ribose 1-phosphate from S-methyl-5'-thioadenosine (phosphorylase route).UniRule annotation
Proteins known to be involved in this subpathway in this organism are:
  1. S-methyl-5'-thioadenosine phosphorylase (GA18442)
This subpathway is part of the pathway L-methionine biosynthesis via salvage pathway, which is itself part of Amino-acid biosynthesis.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes S-methyl-5-thio-alpha-D-ribose 1-phosphate from S-methyl-5'-thioadenosine (phosphorylase route), the pathway L-methionine biosynthesis via salvage pathway and in Amino-acid biosynthesis.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Binding sitei24PhosphateUniRule annotation1
Sitei184Important for substrate specificityUniRule annotation1
Binding sitei202Substrate; via amide nitrogenUniRule annotation1
Binding sitei203PhosphateUniRule annotation1
Sitei239Important for substrate specificityUniRule annotation1

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Glycosyltransferase, Transferase

Keywords - Biological processi

Purine salvage

Enzyme and pathway databases

UniPathwayiUPA00904; UER00873.

Names & Taxonomyi

Protein namesi
Recommended name:
S-methyl-5'-thioadenosine phosphorylaseUniRule annotation (EC:2.4.2.28UniRule annotation)
Alternative name(s):
5'-methylthioadenosine phosphorylaseUniRule annotation
Short name:
MTA phosphorylaseUniRule annotation
Short name:
MTAPUniRule annotation
Short name:
MTAPaseUniRule annotation
Gene namesi
ORF Names:GA18442
OrganismiDrosophila pseudoobscura pseudoobscura (Fruit fly)
Taxonomic identifieri46245 [NCBI]
Taxonomic lineageiEukaryotaMetazoaEcdysozoaArthropodaHexapodaInsectaPterygotaNeopteraEndopterygotaDipteraBrachyceraMuscomorphaEphydroideaDrosophilidaeDrosophilaSophophora
Proteomesi
  • UP000001819 Componentsi: Chromosome 3, Partially assembled WGS sequence

Organism-specific databases

FlyBaseiFBgn0078444. Dpse\GA18442.

Subcellular locationi

  • Cytoplasm UniRule annotation
  • Nucleus UniRule annotation

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Cytoplasm, Nucleus

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00004151201 – 289S-methyl-5'-thioadenosine phosphorylaseAdd BLAST289

Interactioni

Subunit structurei

Homotrimer.UniRule annotation

Structurei

3D structure databases

ProteinModelPortaliQ291H4.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni66 – 67Phosphate bindingUniRule annotation2
Regioni99 – 100Phosphate bindingUniRule annotation2
Regioni226 – 228Substrate bindingUniRule annotation3

Sequence similaritiesi

Belongs to the PNP/MTAP phosphorylase family. MTAP subfamily.UniRule annotation

Phylogenomic databases

InParanoidiQ291H4.
KOiK00772.
OMAiCVAHVSM.
PhylomeDBiQ291H4.

Family and domain databases

Gene3Di3.40.50.1580. 1 hit.
HAMAPiMF_01963. MTAP. 1 hit.
InterProiIPR010044. MTAP.
IPR000845. Nucleoside_phosphorylase_d.
IPR001369. PNP/MTAP.
IPR018099. Purine_phosphorylase-2_CS.
[Graphical view]
PANTHERiPTHR11904. PTHR11904. 1 hit.
PfamiPF01048. PNP_UDP_1. 1 hit.
[Graphical view]
SUPFAMiSSF53167. SSF53167. 1 hit.
TIGRFAMsiTIGR01694. MTAP. 1 hit.
PROSITEiPS01240. PNP_MTAP_2. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Q291H4-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MLHIKCKDTD LDPIPVKIGI IGGSGLDDPD ILENRQEKVI STPYGEPSDA
60 70 80 90 100
LIQGEIGGVQ CVLLARHGRK HDIMPSNVNY RANIWALRDV GCTHLIVSTA
110 120 130 140 150
CGSLREQIKP GNLVMPHDFI DRTTKRSQTF YDGSATSPRG VCHLPMYPAF
160 170 180 190 200
SERTRNILIE AAKELEIPAH EKATIVTIEG PRFSSRSESL MFREWGGDLI
210 220 230 240 250
NMTTCPEVVL AKEAGLLYGS VAIATDYDCW RMGCEGVNVQ DVLKTFAENV
260 270 280
IKVKKILVNA VGRIAKEDWS EDILNAKQCV CNNTMSGAM
Length:289
Mass (Da):31,844
Last modified:April 4, 2006 - v1
Checksum:i2109F54933516F64
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CM000071 Genomic DNA. Translation: EAL25138.1.
RefSeqiXP_001360563.2. XM_001360526.3.

Genome annotation databases

EnsemblMetazoaiFBtr0279178; FBpp0277616; FBgn0078444.
GeneIDi4803922.
KEGGidpo:Dpse_GA18442.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CM000071 Genomic DNA. Translation: EAL25138.1.
RefSeqiXP_001360563.2. XM_001360526.3.

3D structure databases

ProteinModelPortaliQ291H4.
ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblMetazoaiFBtr0279178; FBpp0277616; FBgn0078444.
GeneIDi4803922.
KEGGidpo:Dpse_GA18442.

Organism-specific databases

FlyBaseiFBgn0078444. Dpse\GA18442.

Phylogenomic databases

InParanoidiQ291H4.
KOiK00772.
OMAiCVAHVSM.
PhylomeDBiQ291H4.

Enzyme and pathway databases

UniPathwayiUPA00904; UER00873.

Family and domain databases

Gene3Di3.40.50.1580. 1 hit.
HAMAPiMF_01963. MTAP. 1 hit.
InterProiIPR010044. MTAP.
IPR000845. Nucleoside_phosphorylase_d.
IPR001369. PNP/MTAP.
IPR018099. Purine_phosphorylase-2_CS.
[Graphical view]
PANTHERiPTHR11904. PTHR11904. 1 hit.
PfamiPF01048. PNP_UDP_1. 1 hit.
[Graphical view]
SUPFAMiSSF53167. SSF53167. 1 hit.
TIGRFAMsiTIGR01694. MTAP. 1 hit.
PROSITEiPS01240. PNP_MTAP_2. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiMTAP_DROPS
AccessioniPrimary (citable) accession number: Q291H4
Entry historyi
Integrated into UniProtKB/Swiss-Prot: January 25, 2012
Last sequence update: April 4, 2006
Last modified: October 5, 2016
This is version 61 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programDrosophila annotation project

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. Drosophila
    Drosophila: entries, gene names and cross-references to FlyBase
  2. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  3. 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.