A9MPK2 (MTNN_SALAR) 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:	SARI_02797

Organism

Salmonella arizonae (strain ATCC BAA-731 / CDC346-86 / RSK2980) [Complete proteome] [HAMAP]

Taxonomic identifier

41514 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Enterobacteriales › Enterobacteriaceae › Salmonella

Protein attributes

Sequence length	232 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
Subunit structure	Homodimer By similarity. 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 – 232	232	5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase HAMAP MF_01684		PRO_0000359327
Regions
	Region	173 – 174	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	152	1	Substrate; via amide nitrogen and carbonyl oxygen By similarity
	Binding site	197	1	Substrate By similarity

Sequences

	Sequence		Length	Mass (Da)
	A9MPK2 [UniParc]. Last modified February 5, 2008. Version 1. Checksum: CE8253A3A2B6C14F	FASTA	232	24,588
	10 20 30 40 50 60 MKIGIIGAME EEVTLLRDKI ENRQTLTLGG CEIYTGQLNG TDVALLKSGI GKVAAALGAT 70 80 90 100 110 120 LLLEHCKPDV IINTGSAGGL ASTLKVGDIV VSDEARYHDA DVTAFGYEYG QLPGCPAGFK 130 140 150 160 170 180 ADDKLIAAAE YCIRELNLNA VRGLIVSGDA FINGSVGLAK IRHNFPNAVA VEMEATAIAH 190 200 210 220 230 VCYNFKVPFV VVRAISDVAD QQSHLNFDEF LAVAAKQSTL MVETLVQKLA HG

References

[1]

The Salmonella enterica serovar Arizonae Genome Sequencing Project McClelland M., Sanderson E.K., Porwollik S., Spieth J., Clifton W.S., Fulton R., Chunyan W., Wollam A., Shah N., Pepin K., Bhonagiri V., Nash W., Johnson M., Thiruvilangam P., Wilson R. Submitted (NOV-2007) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: ATCC BAA-731 / CDC346-86 / RSK2980.

Cross-references

Sequence databases
EMBL GenBank DDBJ	CP000880 Genomic DNA. Translation: ABX22645.1.
RefSeq	YP_001571787.1. NC_010067.1.
3D structure databases
ProteinModelPortal	A9MPK2.
SMR	A9MPK2. Positions 1-232.
ModBase	Search...
Protein-protein interaction databases
STRING	A9MPK2.
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
GeneID	5763699.
GenomeReviews	Gene locus SARI_02797 in contig CP000880_GR.
KEGG	ses:SARI_02797.
PATRIC	18474638. VBISalEnt13497_2667.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	HBG367723.
OMA	VIGAMEQ.
ProtClustDB	PRK05584.
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_SALAR

Accession

Primary (citable) accession number: A9MPK2

Entry history

Integrated into UniProtKB/Swiss-Prot:	January 20, 2009
Last sequence update:	February 5, 2008
Last modified:	January 25, 2012
This is version 28 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program