Reviewed, UniProtKB/Swiss-Prot A0AIU3 (MTNN_LISW6)

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=SAH nucleosidase
      Short name=AdoHcy nucleosidase
      Short name=SRH nucleosidase

Gene names

Name:	mtnN
Ordered Locus Names:	lwe1507

Organism

Listeria welshimeri serovar 6b (strain ATCC 35897 / DSM 20650 / SLCC5334) [Complete proteome] [HAMAP]

Taxonomic identifier

386043 [NCBI]

Taxonomic lineage

Bacteria › Firmicutes › Bacillales › Listeriaceae › Listeria

Protein attributes

Sequence length	233 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
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.
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	methionine biosynthetic process from S-adenosylmethionine Inferred from electronic annotation. Source: HAMAP methionine salvage 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: HAMAP methylthioadenosine nucleosidase activity Inferred from electronic annotation. Source: HAMAP
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 233	233	5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase HAMAP MF_01684		PRO_0000359315
Regions
	Region	177 – 178	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	156	1	Substrate; via amide nitrogen and carbonyl oxygen By similarity
	Binding site	201	1	Substrate By similarity

Sequences

	Sequence		Length	Mass (Da)
	A0AIU3-1 [UniParc]. Last modified November 28, 2006. Version 1. Checksum: BC242C55BB3C1308	FASTA	233	25,436
	10 20 30 40 50 60 MTIGIIGAME EEVELLKNTM PHVEEVVIGG AKFYVGEIAG KEVVLLESGI GKVNAAIGTT 70 80 90 100 110 120 LLADRFKPEI IINTGSAGGM AEGLAVGDVI ISDRLAYGDV DVTEFGYTYG QVPRMPAFYQ 130 140 150 160 170 180 GDAVLLKKAE TIYRDYFSQS ENKAVYGLVI TNDSFIMRPD QHELIRTFFP DVKAVEMEAA 190 200 210 220 230 AIAQVAYQFD IPFLIIRAIS DLANQEATIS FDEFIHLAAK QSATCIIELL KTI

References

[1]

"Whole-genome sequence of Listeria welshimeri reveals common steps in genome reduction with Listeria innocua as compared to Listeria monocytogenes." Hain T., Steinweg C., Kuenne C.T., Billion A., Ghai R., Chatterjee S.S., Domann E., Kaerst U., Goesmann A., Bekel T., Bartels D., Kaiser O., Meyer F., Puehler A., Weisshaar B., Wehland J., Liang C., Dandekar T. , Lampidis R., Kreft J., Goebel W., Chakraborty T. J. Bacteriol. 188:7405-7415(2006) [PubMed: 16936040] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Cross-references

Sequence databases
EMBLGenBankDDBJ	AM263198 Genomic DNA. Translation: CAK20925.1.
RefSeq	YP_849704.1.
3D structure databases
ModBase	Search...
Protein-protein interaction databases
STRING	A0AIU3.
Genome annotation databases
GeneID	4465425.
GenomeReviews	Gene locus lwe1507 in contig AM263198_GR.
KEGG	lwe:lwe1507.
NMPDR	fig|386043.6.peg.1461.
Organism-specific databases
CMR	Search...
Phylogenomic databases
OMA	AQVCHQF.
Family and domain databases
HAMAP	MF_01684. [Tree]
InterPro	IPR010049. MTA_SAH_Nsdase. IPR000845. Nucleoside_phosphorylase. IPR018017. Nucleoside_phosphorylase_1. [Graphical view]
PANTHER	PTHR21234. PNP_UDP. 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_LISW6

Accession

Primary (citable) accession number: A0AIU3

Entry history

Integrated into UniProtKB/Swiss-Prot:	January 20, 2009
Last sequence update:	November 28, 2006
Last modified:	November 3, 2009
This is version 21 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HAMAP (High-quality Automated and Manual Annotation of microbial Proteomes)