B7JP64 (MTNN_BACC0) 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:	BCAH820_4454

Organism

Bacillus cereus (strain AH820) [Complete proteome] [HAMAP]

Taxonomic identifier

405535 [NCBI]

Taxonomic lineage

Bacteria › Firmicutes › Bacillales › Bacillaceae › Bacillus › Bacillus cereus group

Protein attributes

Sequence length	231 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 – 231	231	5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase HAMAP MF_01684		PRO_1000187409
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)
	B7JP64 [UniParc]. Last modified February 10, 2009. Version 1. Checksum: 11F3ACE054DE48AC	FASTA	231	25,255
	10 20 30 40 50 60 MRIAVIGAME EEVRILRDKL EQAETETVAG CEFTKGQLAG HEVILLKSGI GKVNAAMSTT 70 80 90 100 110 120 ILLERYKPEK VINTGSAGGF HHSLNVGDVV ISTEVRHHDV DVTAFNYEYG QVPGMPPGFK 130 140 150 160 170 180 ADEALVALAE KCMQAEENIQ VVKGMIATGD SFMSDPNRVA AIRDKFENLY AVEMEAAAVA 190 200 210 220 230 QVCHQYEVPF VIIRALSDIA GKESNVSFDQ FLDQAALHST NFIVKVLEEL K

References

[1]	"Genome sequence of Bacillus cereus AH820." Dodson R.J., Durkin A.S., Rosovitz M.J., Rasko D.A., Hoffmaster A., Ravel J., Sutton G. Submitted (OCT-2008) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: AH820.

Cross-references

Sequence databases
EMBL GenBank DDBJ	CP001283 Genomic DNA. Translation: ACK88111.1.
RefSeq	YP_002453403.1. NC_011773.1.
3D structure databases
ProteinModelPortal	B7JP64.
SMR	B7JP64. Positions 1-230.
ModBase	Search...
Protein-protein interaction databases
STRING	B7JP64.
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
EnsemblBacteria	EBBACT00000087591; EBBACP00000083429; EBBACG00000087584.
GeneID	7187218.
GenomeReviews	Gene locus BCAH820_4454 in contig CP001283_GR.
KEGG	bcu:BCAH820_4454.
PATRIC	18845881. VBIBacCer122868_4447.
Organism-specific databases
CMR	Search...
Phylogenomic databases
GeneTree	EBGT00050000000478.
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_BACC0

Accession

Primary (citable) accession number: B7JP64

Entry history

Integrated into UniProtKB/Swiss-Prot:	July 28, 2009
Last sequence update:	February 10, 2009
Last modified:	January 25, 2012
This is version 21 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program