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A8ALC9 (MTNN_CITK8) Reviewed, UniProtKB/Swiss-Prot

Last modified January 25, 2012. Version 28. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (2) | Third-party data text xml rdf/xml gff fasta
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Names and origin

Protein namesRecommended name:
5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase
Short name=MTA/SAH nucleosidase
Short name=MTAN
EC=3.2.2.9
Alternative name(s):
5'-methylthioadenosine nucleosidase
Short name=MTA nucleosidase
S-adenosylhomocysteine nucleosidase
Short name=AdoHcy nucleosidase
Short name=SAH nucleosidase
Short name=SRH nucleosidase
Gene names
Name:mtnN
Ordered Locus Names:CKO_03208
OrganismCitrobacter koseri (strain ATCC BAA-895 / CDC 4225-83 / SGSC4696) [Complete proteome] [HAMAP]
Taxonomic identifier290338 [NCBI]
Taxonomic lineageBacteria › Proteobacteria › Gammaproteobacteria › Enterobacteriales › Enterobacteriaceae › Citrobacter

Protein attributes

Sequence length232 AA.
Sequence statusComplete.
Protein existenceInferred from homology

General annotation (Comments)

Function

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 By similarity. HAMAP MF_01684

Catalytic activity

S-adenosyl-L-homocysteine + H2O = S-(5-deoxy-D-ribos-5-yl)-L-homocysteine + adenine. HAMAP MF_01684

S-methyl-5'-thioadenosine + H2O = S-methyl-5-thio-D-ribose + adenine. HAMAP MF_01684

Pathway

Amino-acid biosynthesis; L-methionine biosynthesis via salvage pathway; S-methyl-5-thio-alpha-D-ribose 1-phosphate from S-methyl-5'-thioadenosine (hydrolase route): step 1/2. HAMAP MF_01684

Subunit structure

Homodimer By similarity. HAMAP MF_01684

Sequence similarities

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

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Chain1 – 2322325'-methylthioadenosine/S-adenosylhomocysteine nucleosidase HAMAP MF_01684
PRO_0000359286

Regions

Region173 – 1742Substrate binding By similarity

Sites

Active site121Proton acceptor By similarity
Binding site781Substrate; via amide nitrogen By similarity
Binding site1521Substrate; via amide nitrogen and carbonyl oxygen By similarity
Binding site1971Substrate By similarity

Sequences

Sequence LengthMass (Da)Tools
A8ALC9 [UniParc].

Last modified October 23, 2007. Version 1.
Checksum: CA043822EB9B4178

FASTA23224,330
        10         20         30         40         50         60 
MKIGIIGAME EEVTLLRDKI ENRQTITLGG CEIYTGQLNG TEIALLKSGI GKVAAALGAT 

        70         80         90        100        110        120 
LLLERCKPDV IINTGSAGGL APTLTVGDIV VSDEARYHDA DVTAFGYEFG QLPGCPAGFK 

       130        140        150        160        170        180 
ADDALIAAAE SCIAKLNLNA VRGLIVSGDA FINGSVGLAK IRHNFPQAIA VEMEATAIAH 

       190        200        210        220        230 
VCHNFNVPFV VVRAISDVAD QQSHLSFDEF LAVAAKQSSL MVETLVQKLA HG

« Hide

References

[1]The Citrobacter koseri Genome Sequencing Project
McClelland M., Sanderson E.K., Porwollik S., Spieth J., Clifton W.S., Latreille P., Courtney L., Wang C., Pepin K., Bhonagiri V., Nash W., Johnson M., Thiruvilangam P., Wilson R.
Submitted (AUG-2007) to the EMBL/GenBank/DDBJ databases
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
Strain: ATCC BAA-895 / CDC 4225-83 / SGSC4696.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ		CP000822 Genomic DNA. Translation: ABV14292.1.
RefSeqYP_001454728.1. NC_009792.1.

3D structure databases

ProteinModelPortalA8ALC9.
SMRA8ALC9. Positions 1-232.
ModBaseSearch...

Protein-protein interaction databases

STRINGA8ALC9.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

GeneID5583233.
GenomeReviewsGene locus CKO_03208 in contig CP000822_GR.
KEGGcko:CKO_03208.
PATRIC20389014. VBICitKos71230_2685.

Organism-specific databases

CMRSearch...

Phylogenomic databases

eggNOGCOG0775.
HOGENOMHBG367723.
OMAVIGAMEQ.
ProtClustDBPRK05584.

Family and domain databases

HAMAPMF_01684. Salvage_tnN.
[Tree]
InterProIPR010049. MTA_SAH_Nsdase.
IPR018017. Nucleoside_phosphorylase.
IPR000845. Nucleoside_phosphorylase_d.
[Graphical view]
KOK01243.
PANTHERPTHR21234. PNP_UDP. 1 hit.
PTHR21234:SF6. PTHR21234:SF6. 1 hit.
PfamPF01048. PNP_UDP_1. 1 hit.
[Graphical view]
TIGRFAMsTIGR01704. MTA/SAH-Nsdase. 1 hit.
ProtoNetSearch...

Entry information

Entry nameMTNN_CITK8
AccessionPrimary (citable) accession number: A8ALC9
Entry history
Integrated into UniProtKB/Swiss-Prot: January 20, 2009
Last sequence update: October 23, 2007
Last modified: January 25, 2012
This is version 28 of the entry and version 1 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Relevant documents

PATHWAY comments

Index of metabolic and biosynthesis pathways

SIMILARITY comments

Index of protein domains and families

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