B8CQP2 (MTNN_SHEPW) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended 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:	swp_3830

Organism

Shewanella piezotolerans (strain WP3 / JCM 13877) [Complete proteome] [HAMAP]

Taxonomic identifier

225849 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Alteromonadales › Shewanellaceae › Shewanella

Protein attributes

Sequence length	230 AA.
Sequence status	Complete.
Protein existence	Inferred 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
Sequence similarities	Belongs to the PNP/UDP phosphorylase family. MtnN subfamily.

Ontologies

Keywords
Biological process	Amino-acid biosynthesis Methionine biosynthesis
Molecular function	Hydrolase
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	L-methionine salvage from methylthioadenosine Inferred from electronic annotation. Source: InterPro nucleoside catabolic process Inferred from electronic annotation. Source: InterPro
Molecular function	adenosylhomocysteine nucleosidase activity Inferred from electronic annotation. Source: EC methylthioadenosine nucleosidase activity Inferred from electronic annotation. Source: InterPro
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 230	230	5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase HAMAP MF_01684		PRO_1000187431
Regions
	Region	174 – 175	2	Substrate binding By similarity
Sites
	Active site	12	1	Proton acceptor By similarity
	Binding site	78	1	Substrate; via amide nitrogen By similarity
	Binding site	153	1	Substrate; via amide nitrogen and carbonyl oxygen By similarity
	Binding site	198	1	Substrate By similarity

Sequences

	Sequence		Length	Mass (Da)
	B8CQP2 [UniParc]. Last modified March 3, 2009. Version 1. Checksum: 3B2A0B0831F4D88D	FASTA	230	24,097
	10 20 30 40 50 60 MKIGIIGAME PEVAHLVESM ENSTSTTIAG IEFVAGQLAG QEVIVTRSGI GKVTASIATT 70 80 90 100 110 120 LLIEKYAPDA IINTGSAGGF ADDLAIGDIV ISSEVRHHDV DVTAFGYEIG QMAQQPAAFL 130 140 150 160 170 180 PDAKLVAAAQ KAVASLGEVK AIEGLICTGD SFICDPVRTK TMLENFPTMA ACEMEAAAIA 190 200 210 220 230 QVCHQFAVPF VVIRSLSDNA NDDSAVDFDE YIIKAGLHSA LMVIALIKQL

References

[1]

"Environmental adaptation: genomic analysis of the piezotolerant and psychrotolerant deep-sea iron reducing bacterium Shewanella piezotolerans WP3." Wang F., Wang J., Jian H., Zhang B., Li S., Wang F., Zeng X., Gao L., Bartlett D.H., Yu J., Hu S., Xiao X. PLoS ONE 3:E1937-E1937(2008) [PubMed: 18398463] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: WP3 / JCM 13877.

Cross-references

Sequence databases
EMBL GenBank DDBJ	CP000472 Genomic DNA. Translation: ACJ30508.1.
RefSeq	YP_002313095.1. NC_011566.1.
3D structure databases
ProteinModelPortal	B8CQP2.
ModBase	Search...
Protein-protein interaction databases
STRING	B8CQP2.
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
GeneID	7034793.
GenomeReviews	Gene locus swp_3830 in contig CP000472_GR.
KEGG	swp:swp_3830.
PATRIC	23546021. VBIShePie65056_3521.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	HBG367723.
OMA	HLDNAQE.
ProtClustDB	CLSK906203.
Family and domain databases
HAMAP	MF_01684. Salvage_tnN. [Tree]
InterPro	IPR010049. MTA_SAH_Nsdase. IPR018017. Nucleoside_phosphorylase. IPR000845. Nucleoside_phosphorylase_d. [Graphical view]
KO	K01243.
PANTHER	PTHR21234. PNP_UDP. 1 hit. PTHR21234:SF6. PTHR21234:SF6. 1 hit.
Pfam	PF01048. PNP_UDP_1. 1 hit. [Graphical view]
TIGRFAMs	TIGR01704. MTA/SAH-Nsdase. 1 hit.
ProtoNet	Search...

Entry information

Entry name

MTNN_SHEPW

Accession

Primary (citable) accession number: B8CQP2

Entry history

Integrated into UniProtKB/Swiss-Prot:	July 28, 2009
Last sequence update:	March 3, 2009
Last modified:	January 25, 2012
This is version 20 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program