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Protein

S-methyl-5'-thioadenosine phosphorylase

Gene

mtnP

Organism
Gloeobacter violaceus (strain PCC 7421)
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 (mtnP)
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 sitei14PhosphateUniRule annotation1
Sitei173Important for substrate specificityUniRule annotation1
Binding sitei191Substrate; via amide nitrogenUniRule annotation1
Binding sitei192PhosphateUniRule annotation1
Sitei228Important 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
Gene namesi
Name:mtnPUniRule annotation
Ordered Locus Names:gll2424
OrganismiGloeobacter violaceus (strain PCC 7421)
Taxonomic identifieri251221 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaGloeobacteriaGloeobacteralesGloeobacteraceaeGloeobacter
Proteomesi
  • UP000000557 Componenti: Chromosome

Subcellular locationi

GO - Cellular componenti

Complete GO annotation...

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00004150931 – 299S-methyl-5'-thioadenosine phosphorylaseAdd BLAST299

Interactioni

Subunit structurei

Homohexamer. Dimer of a homotrimer.UniRule annotation

Protein-protein interaction databases

STRINGi251221.gll2424.

Structurei

3D structure databases

ProteinModelPortaliQ7NHW1.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni56 – 57Phosphate bindingUniRule annotation2
Regioni89 – 90Phosphate bindingUniRule annotation2
Regioni215 – 217Substrate bindingUniRule annotation3

Sequence similaritiesi

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

Phylogenomic databases

eggNOGiENOG4107RHB. Bacteria.
COG0005. LUCA.
HOGENOMiHOG000228986.
InParanoidiQ7NHW1.
KOiK00772.
OMAiCVAHVSM.
OrthoDBiPOG091H0228.
PhylomeDBiQ7NHW1.

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.

Q7NHW1-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MSYPQARIGV IGGSGLYQMA DLADTVEVQF NTPFGPPSDA LVIGTLAGER
60 70 80 90 100
VAFLPRHGRG HRLLPAELPF QANIYAMKML GVEYLLSASA VGSLREEYRP
110 120 130 140 150
RDIVFPDQFF DRTKDRPSTF FGGGLVAHIG FDQPICTELA HLAAEAARGV
160 170 180 190 200
ELIGETRIHT GGTYVCMEGP AFSTLAESRL YRSWGMDIIG MTNLQEAKLA
210 220 230 240 250
REAEICYATM ALVTDYDCWH PDHGAVTVEL IIDNLHKNAE NAQRIVRAVV
260 270 280 290
ERLHAAAPPC ASHSALKYAL LTQPEDVPQA TKQKLAAILA KYPAYRPEV
Length:299
Mass (Da):32,753
Last modified:December 15, 2003 - v1
Checksum:i0A134C2398AFD025
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BA000045 Genomic DNA. Translation: BAC90365.1.
RefSeqiNP_925370.1. NC_005125.1.
WP_011142419.1. NC_005125.1.

Genome annotation databases

EnsemblBacteriaiBAC90365; BAC90365; BAC90365.
GeneIDi2600825.
KEGGigvi:gll2424.
PATRICi22044321. VBIGloVio86258_2461.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BA000045 Genomic DNA. Translation: BAC90365.1.
RefSeqiNP_925370.1. NC_005125.1.
WP_011142419.1. NC_005125.1.

3D structure databases

ProteinModelPortaliQ7NHW1.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi251221.gll2424.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiBAC90365; BAC90365; BAC90365.
GeneIDi2600825.
KEGGigvi:gll2424.
PATRICi22044321. VBIGloVio86258_2461.

Phylogenomic databases

eggNOGiENOG4107RHB. Bacteria.
COG0005. LUCA.
HOGENOMiHOG000228986.
InParanoidiQ7NHW1.
KOiK00772.
OMAiCVAHVSM.
OrthoDBiPOG091H0228.
PhylomeDBiQ7NHW1.

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_GLOVI
AccessioniPrimary (citable) accession number: Q7NHW1
Entry historyi
Integrated into UniProtKB/Swiss-Prot: January 25, 2012
Last sequence update: December 15, 2003
Last modified: November 2, 2016
This is version 74 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic 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.