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Protein

5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase

Gene

mtnN

Organism
Escherichia coli O1:K1 / APEC
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

Functioni

Catalyzes the irreversible cleavage of the glycosidic bond in both 5'-methylthioadenosine (MTA) and S-adenosylhomocysteine (SAH/AdoHcy) to adenine and the corresponding thioribose, 5'-methylthioribose and S-ribosylhomocysteine, respectively.UniRule annotation

Catalytic activityi

S-adenosyl-L-homocysteine + H2O = S-(5-deoxy-D-ribos-5-yl)-L-homocysteine + adenine.UniRule annotation
S-methyl-5'-thioadenosine + H2O = S-methyl-5-thio-D-ribose + adenine.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 (hydrolase route).UniRule annotation
Proteins known to be involved in the 2 steps of the subpathway in this organism are:
  1. 5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase (mtnN)
  2. no protein annotated in this organism
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 (hydrolase route), the pathway L-methionine biosynthesis via salvage pathway and in Amino-acid biosynthesis.

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Active sitei12 – 121Proton acceptorUniRule annotation
Binding sitei78 – 781Substrate; via amide nitrogenUniRule annotation
Binding sitei152 – 1521Substrate; via amide nitrogen and carbonyl oxygenUniRule annotation
Active sitei197 – 1971Proton donorUniRule annotation

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Hydrolase

Keywords - Biological processi

Amino-acid biosynthesis, Methionine biosynthesis

Enzyme and pathway databases

UniPathwayiUPA00904; UER00871.

Names & Taxonomyi

Protein namesi
Recommended name:
5'-methylthioadenosine/S-adenosylhomocysteine nucleosidaseUniRule annotation (EC:3.2.2.9UniRule annotation)
Short name:
MTA/SAH nucleosidaseUniRule annotation
Short name:
MTANUniRule annotation
Alternative name(s):
5'-methylthioadenosine nucleosidaseUniRule annotation
Short name:
MTA nucleosidaseUniRule annotation
S-adenosylhomocysteine nucleosidaseUniRule annotation
Short name:
AdoHcy nucleosidaseUniRule annotation
Short name:
SAH nucleosidaseUniRule annotation
Short name:
SRH nucleosidaseUniRule annotation
Gene namesi
Name:mtnNUniRule annotation
Ordered Locus Names:Ecok1_01510
ORF Names:APECO1_1826
OrganismiEscherichia coli O1:K1 / APEC
Taxonomic identifieri405955 [NCBI]
Taxonomic lineageiBacteriaProteobacteriaGammaproteobacteriaEnterobacterialesEnterobacteriaceaeEscherichia
Proteomesi
  • UP000008216 Componenti: Chromosome

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 2322325'-methylthioadenosine/S-adenosylhomocysteine nucleosidasePRO_0000359298Add
BLAST

Proteomic databases

PRIDEiA1A7K5.

Interactioni

Subunit structurei

Homodimer.UniRule annotation

Structurei

3D structure databases

ProteinModelPortaliA1A7K5.
SMRiA1A7K5. Positions 1-232.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Region

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Regioni173 – 1742Substrate bindingUniRule annotation

Sequence similaritiesi

Belongs to the PNP/UDP phosphorylase family. MtnN subfamily.UniRule annotation

Phylogenomic databases

HOGENOMiHOG000259346.
KOiK01243.
OMAiLLERCKP.

Family and domain databases

Gene3Di3.40.50.1580. 1 hit.
HAMAPiMF_01684. Salvage_MtnN. 1 hit.
InterProiIPR010049. MTA_SAH_Nsdase.
IPR018017. Nucleoside_phosphorylase.
IPR000845. Nucleoside_phosphorylase_d.
[Graphical view]
PANTHERiPTHR21234. PTHR21234. 1 hit.
PfamiPF01048. PNP_UDP_1. 1 hit.
[Graphical view]
SUPFAMiSSF53167. SSF53167. 1 hit.
TIGRFAMsiTIGR01704. MTA/SAH-Nsdase. 1 hit.

Sequencei

Sequence statusi: Complete.

A1A7K5-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MKIGIIGAME EEVTLLRDKI ENRQTISLGG CEIYTGQLNG TEVALLKSGI
60 70 80 90 100
GKVAAALGAT LLLEHCKPDV IINTGSAGGL APTLKVGDIV VSDEARYHDA
110 120 130 140 150
DVTAFGYEYG QLPGCPAGFK ADDKLIAAAE ACIAELNLNA VRGLIVSGDA
160 170 180 190 200
FINGSVGLAK IRHNFPQAIA VEMEATAIAH VCHNFNVPFV VVRAISDVAD
210 220 230
QQSHLSFDEF LAVAAKQSSL MVESLVQKLA HG
Length:232
Mass (Da):24,354
Last modified:January 23, 2007 - v1
Checksum:i9B1FF9BEC39D4F2C
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP000468 Genomic DNA. Translation: ABI99644.1.
RefSeqiWP_000689844.1. NC_008563.1.

Genome annotation databases

EnsemblBacteriaiABI99644; ABI99644; APECO1_1826.
KEGGiecv:APECO1_1826.
PATRICi18211717. VBIEscCol127180_0172.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP000468 Genomic DNA. Translation: ABI99644.1.
RefSeqiWP_000689844.1. NC_008563.1.

3D structure databases

ProteinModelPortaliA1A7K5.
SMRiA1A7K5. Positions 1-232.
ModBaseiSearch...
MobiDBiSearch...

Proteomic databases

PRIDEiA1A7K5.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiABI99644; ABI99644; APECO1_1826.
KEGGiecv:APECO1_1826.
PATRICi18211717. VBIEscCol127180_0172.

Phylogenomic databases

HOGENOMiHOG000259346.
KOiK01243.
OMAiLLERCKP.

Enzyme and pathway databases

UniPathwayiUPA00904; UER00871.

Family and domain databases

Gene3Di3.40.50.1580. 1 hit.
HAMAPiMF_01684. Salvage_MtnN. 1 hit.
InterProiIPR010049. MTA_SAH_Nsdase.
IPR018017. Nucleoside_phosphorylase.
IPR000845. Nucleoside_phosphorylase_d.
[Graphical view]
PANTHERiPTHR21234. PTHR21234. 1 hit.
PfamiPF01048. PNP_UDP_1. 1 hit.
[Graphical view]
SUPFAMiSSF53167. SSF53167. 1 hit.
TIGRFAMsiTIGR01704. MTA/SAH-Nsdase. 1 hit.
ProtoNetiSearch...

Entry informationi

Entry nameiMTNN_ECOK1
AccessioniPrimary (citable) accession number: A1A7K5
Entry historyi
Integrated into UniProtKB/Swiss-Prot: January 20, 2009
Last sequence update: January 23, 2007
Last modified: September 7, 2016
This is version 66 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

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.