Reviewed, UniProtKB/Swiss-Prot Q5HTR6 (LUXS_CAMJR)

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:	CJE1332

Organism

Campylobacter jejuni (strain RM1221) [Complete proteome] [HAMAP]

Taxonomic identifier

195099 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Epsilonproteobacteria › Campylobacterales › Campylobacteraceae › Campylobacter

Protein attributes

Sequence length	164 AA.
Sequence status	Complete.
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. HAMAP MF_00091
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. HAMAP MF_00091
Subunit structure	Homodimer By similarity. HAMAP MF_00091
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 – 164	164	S-ribosylhomocysteine lyase HAMAP MF_00091		PRO_0000172215
Sites
	Metal binding	54	1	Iron By similarity
	Metal binding	58	1	Iron By similarity
	Metal binding	128	1	Iron By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q5HTR6-1 [UniParc]. Last modified February 15, 2005. Version 1. Checksum: 63FE7BDD1A9A1AC1	FASTA	164	18,271
	10 20 30 40 50 60 MPLLDSFKVD HTKMPAPAVR LAKVMKTPKG DDISVFDLRF CIPNKDIMSE KGTHTLEHLF 70 80 90 100 110 120 AGFMRDHLNS NSVEIIDISP MGCRTGFYMS LIGTPDEKSV AKAWEEAMKD VLSVSDQSKI 130 140 150 160 PELNIYQCGT CAMHSLDEAK QIAQKVLNLG ISIMNNKELK LENA

References

[1]

"Major structural differences and novel potential virulence mechanisms from the genomes of multiple Campylobacter species." Fouts D.E., Mongodin E.F., Mandrell R.E., Miller W.G., Rasko D.A., Ravel J., Brinkac L.M., DeBoy R.T., Parker C.T., Daugherty S.C., Dodson R.J., Durkin A.S., Madupu R., Sullivan S.A., Shetty J.U., Ayodeji M.A., Shvartsbeyn A., Schatz M.C. , Badger J.H., Fraser C.M., Nelson K.E. PLoS Biol. 3:72-85(2005) [PubMed: 15660156] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Cross-references

Sequence databases
EMBL GenBank DDBJ	CP000025 Genomic DNA. Translation: AAW35653.1.
RefSeq	YP_179319.1.
3D structure databases
SMR	Q5HTR6. Positions 3-163.
ModBase	Search...
Protein-protein interaction databases
STRING	Q5HTR6.
Genome annotation databases
GeneID	3231839.
GenomeReviews	Gene locus CJE1332 in contig CP000025_GR.
KEGG	cjr:CJE1332.
NMPDR	fig|195099.3.peg.1371.
TIGR	CJE1332.
Phylogenomic databases
eggNOG	COG1854.
HOGENOM	HBG347473.
OMA	VRIAKTM.
Enzyme and pathway databases
BioCyc	CJEJ195099:CJE_1332-MONOMER.
Family and domain databases
HAMAP	MF_00091. LuxS. [Tree]
InterPro	IPR011249. Metalloenz_metal-bd. 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. S-ribosylhomocysteinase. 1 hit. [Graphical view] [Entries sharing at least one domain]
ProtoNet	Search...

Entry information

Entry name

LUXS_CAMJR

Accession

Primary (citable) accession number: Q5HTR6

Entry history

Integrated into UniProtKB/Swiss-Prot:	August 16, 2005
Last sequence update:	February 15, 2005
Last modified:	January 19, 2010
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)