Reviewed, UniProtKB/Swiss-Prot Q5WDW1 (LUXS_BACSK)

Names and origin

Protein names

Recommended name:
    S-ribosylhomocysteine lyase
    EC=4.4.1.21
Alternative name(s):
    Autoinducer-2 production protein luxS
    AI-2 synthesis protein

Gene names

Name:	luxS
Ordered Locus Names:	ABC2915

Organism

Bacillus clausii (strain KSM-K16) [Complete proteome] [HAMAP]

Taxonomic identifier

66692 [NCBI]

Taxonomic lineage

Bacteria › Firmicutes › Bacillales › Bacillaceae › Bacillus

Protein attributes

Sequence length	156 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Inferred from homology.

General annotation (Comments)

Function	Involved in the synthesis of autoinducer 2 (AI-2) which is secreted by bacteria and is used to communicate both the cell density and the metabolic potential of the environment. The regulation of gene expression in response to changes in cell density is called quorum sensing. Catalyzes the transformation of S-ribosylhomocysteine (RHC) to homocysteine (HC) and 4,5-dihydroxy-2,3-pentadione (DPD) By similarity.
Catalytic activity	S-(5-deoxy-D-ribos-5-yl)-L-homocysteine = L-homocysteine + (4S)-4,5-dihydroxypentan-2,3-dione. HAMAP MF_00091
Cofactor	Binds 1 iron ion per subunit By similarity.
Subunit structure	Homodimer By similarity.
Sequence similarities	Belongs to the luxS family.

Ontologies

Keywords
Biological process	Autoinducer synthesis Quorum sensing
Ligand	Iron Metal-binding
Molecular function	Lyase
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	quorum sensing Inferred from electronic annotation. Source: HAMAP
Molecular function	S-ribosylhomocysteine lyase activity Inferred from electronic annotation. Source: HAMAP iron ion binding Inferred from electronic annotation. Source: UniProtKB-KW
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 156	156	S-ribosylhomocysteine lyase HAMAP MF_00091		PRO_0000172210
Sites
	Metal binding	54	1	Iron By similarity
	Metal binding	58	1	Iron By similarity
	Metal binding	126	1	Iron By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q5WDW1-1 [UniParc]. Last modified November 23, 2004. Version 1. Checksum: 9C38B441A23D8606	FASTA	156	17,629
	10 20 30 40 50 60 MPSVESFELD HTIVKAPYVR HCGKHKIGSD GEVNKFDIRF CQPNKEALKP GVIHTLEHLL 70 80 90 100 110 120 AINIRRFSEE YDHFDVIDIS PMGCQTGYYL IMSGTPSVEE IIDVLEKTMT YSLSIETVPA 130 140 150 ATEKECGQAA LHDLEGTKEV MRKWLSEDKG SLKQVF

References

[1]	"The complete genome sequence of the alkaliphilic Bacillus clausii KSM-K16." Takaki Y., Kageyama Y., Shimamura S., Suzuki H., Nishi S., Hatada Y., Kawai S., Ito S., Horikoshi K. Submitted (OCT-2003) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Cross-references

Sequence databases
EMBLGenBankDDBJ	AP006627 Genomic DNA. Translation: BAD65449.1.
RefSeq	YP_176410.1.
3D structure databases
ModBase	Search...
Protein-protein interaction databases
STRING	Q5WDW1.
Genome annotation databases
GeneID	3204083.
GenomeReviews	Gene locus ABC2915 in contig AP006627_GR.
KEGG	bcl:ABC2915.
NMPDR	fig|66692.3.peg.2804.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	Q5WDW1.
OMA	VRIAKTM.
Enzyme and pathway databases
BioCyc	BCLA66692:ABC2915-MON.
Family and domain databases
HAMAP	MF_00091. [Tree]
InterPro	IPR003815. S-ribosylhomocysteinase. [Graphical view]
Gene3D	G3DSA:3.30.1360.80. S-ribosylhomocysteinase. 1 hit.
Pfam	PF02664. LuxS. 1 hit. [Graphical view]
PIRSF	PIRSF006160. AI2. 1 hit.
PRINTS	PR01487. LUXSPROTEIN.
ProDom	PD013172. LuxS. 1 hit. [Graphical view] [Entries sharing at least one domain]
ProtoNet	Search...

Entry information

Entry name

LUXS_BACSK

Accession

Primary (citable) accession number: Q5WDW1

Entry history

Integrated into UniProtKB/Swiss-Prot:	March 15, 2005
Last sequence update:	November 23, 2004
Last modified:	November 3, 2009
This is version 30 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)