Reviewed, UniProtKB/Swiss-Prot Q3ILJ7 (MTNN_PSEHT)

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:	PSHAa0547

Organism

Pseudoalteromonas haloplanktis (strain TAC 125) [Complete proteome] [HAMAP]

Taxonomic identifier

326442 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Alteromonadales › Pseudoalteromonadaceae › Pseudoalteromonas

Protein attributes

Sequence length	235 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 – 235	235	5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase HAMAP MF_01684		PRO_0000359324
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	198	1	Substrate By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q3ILJ7-1 [UniParc]. Last modified November 8, 2005. Version 1. Checksum: C8B49E447504C7FB	FASTA	235	24,883
	10 20 30 40 50 60 MNVGIIGAME PEVKILREAM QNPQTLTKAG FTFYTGELAG NTVTLVQSGI GKVASTIATT 70 80 90 100 110 120 LLIDNFAPDC VINTGSAGGF DPSLNVGDVV ISSEVRHHDV DVTAFGYEIG QVPQMPAGFA 130 140 150 160 170 180 AHPKLVAAAE QTIAQISDVK TLVGLICTGD IFMCDPIRIE KARSDFPTML AVEMEGASIA 190 200 210 220 230 QTCHTLNTPF VVIRSMSDIA GKESPQSFEE YLETASINSS KMVVALLEKL TAVSL

References

[1]

"Coping with cold: the genome of the versatile marine Antarctica bacterium Pseudoalteromonas haloplanktis TAC125." Medigue C., Krin E., Pascal G., Barbe V., Bernsel A., Bertin P.N., Cheung F., Cruveiller S., D'Amico S., Duilio A., Fang G., Feller G., Ho C., Mangenot S., Marino G., Nilsson J., Parrilli E., Rocha E.P.C. , Rouy Z., Sekowska A., Tutino M.L., Vallenet D., von Heijne G., Danchin A. Genome Res. 15:1325-1335(2005) [PubMed: 16169927] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Cross-references

Sequence databases
EMBLGenBankDDBJ	CR954246 Genomic DNA. Translation: CAI85635.1.
RefSeq	YP_339078.1.
3D structure databases
ModBase	Search...
Protein-protein interaction databases
STRING	Q3ILJ7.
Genome annotation databases
GeneID	3710170.
GenomeReviews	Gene locus PSHAa0547 in contig CR954246_GR.
KEGG	pha:PSHAa0547.
NMPDR	fig|326442.4.peg.521.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	Q3ILJ7.
OMA	AQVCHQF.
Enzyme and pathway databases
BioCyc	PHAL326442:PSHAA0547-MON.
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_PSEHT

Accession

Primary (citable) accession number: Q3ILJ7

Entry history

Integrated into UniProtKB/Swiss-Prot:	January 20, 2009
Last sequence update:	November 8, 2005
Last modified:	November 3, 2009
This is version 28 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)