Reviewed, UniProtKB/Swiss-Prot Q6LUR4 (MTNN_PHOPR)

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:	PBPRA0538

Organism

Photobacterium profundum (Photobacterium sp. (strain SS9)) [Complete proteome] [HAMAP]

Taxonomic identifier

74109 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Vibrionales › Vibrionaceae › Photobacterium

Protein attributes

Sequence length	232 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 – 232	232	5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase HAMAP MF_01684		PRO_0000359321
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)
	Q6LUR4-1 [UniParc]. Last modified July 5, 2004. Version 1. Checksum: 98D9C703737B485F	FASTA	232	24,617
	10 20 30 40 50 60 MKIGIIGAME QEVTILKEQL TDCETHHKAG CIFYTGNLNG ADVVLLQSGI GKVAAAVGTA 70 80 90 100 110 120 VLLEAFQPDA VLNTGSAGGF DSSLTLGDVV ISTEVRYHDA DVTAFGYEIG QMAQQPAAFI 130 140 150 160 170 180 SDEKLILTAE QALASMADMH AVRGLICTGD AFVCTPEKQA FIRDNFPTVI AVEMEAAAIA 190 200 210 220 230 QACHQFNVPF VVVRAISDVA DKESPMSFEE FLPLAAQSSS VMVAKMVEIL NQ

References

[1]

"Life at depth: Photobacterium profundum genome sequence and expression analysis." Vezzi A., Campanaro S., D'Angelo M., Simonato F., Vitulo N., Lauro F.M., Cestaro A., Malacrida G., Simionati B., Cannata N., Romualdi C., Bartlett D.H., Valle G. Science 307:1459-1461(2005) [PubMed: 15746425] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Cross-references

Sequence databases
EMBLGenBankDDBJ	CR378664 Genomic DNA. Translation: CAG18961.1.
RefSeq	YP_128763.1.
3D structure databases
ModBase	Search...
Genome annotation databases
GeneID	3125411.
GenomeReviews	Gene locus PBPRA0538 in contig CR354531_GR.
KEGG	ppr:PBPRA0538.
NMPDR	fig|298386.1.peg.2763.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	Q6LUR4.
OMA	AQVCHQF.
Enzyme and pathway databases
BioCyc	PPRO298386:PBPRA0538-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_PHOPR

Accession

Primary (citable) accession number: Q6LUR4

Entry history

Integrated into UniProtKB/Swiss-Prot:	January 20, 2009
Last sequence update:	July 5, 2004
Last modified:	November 3, 2009
This is version 32 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)