Q9L4T0 (LUXS_SALTY) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended name:
S-ribosylhomocysteine lyase
EC=4.4.1.21

Alternative name(s):
AI-2 synthesis protein
Autoinducer-2 production protein LuxS

Gene names

Name:	luxS
Ordered Locus Names:	STM2817

Organism

Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720) [Reference proteome] [HAMAP]

Taxonomic identifier

99287 [NCBI]

Taxonomic lineage

cellular organisms › Bacteria › Proteobacteria › Gammaproteobacteria › Enterobacteriales › Enterobacteriaceae › Salmonella › Salmonella choleraesuis › Salmonella enterica I › Salmonella typhimurium

Protein attributes

Sequence length	171 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is further processed into a mature form.
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-Rule MF_00091
Catalytic activity	S-(5-deoxy-D-ribos-5-yl)-L-homocysteine = L-homocysteine + (4S)-4,5-dihydroxypentan-2,3-dione. HAMAP-Rule 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 Reference proteome
Gene Ontology (GO)
Biological_process	metabolic process Inferred from electronic annotation. Source: GOC 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: InterPro
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Initiator methionine	1	1	Removed By similarity
	Chain	2 – 171	170	S-ribosylhomocysteine lyase HAMAP-Rule MF_00091		PRO_0000172249
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)
	Q9L4T0 [UniParc]. Last modified January 23, 2007. Version 3. Checksum: 359A88331FF56CDF	FASTA	171	19,308
	10 20 30 40 50 60 MPLLDSFAVD HTRMQAPAVR VAKTMNTPHG DAITVFDLRF CIPNKEVMPE KGIHTLEHLF 70 80 90 100 110 120 AGFMRDHLNG NGVEIIDISP MGCRTGFYMS LIGTPDEQRV ADAWKAAMAD VLKVQDQNQI 130 140 150 160 170 PELNVYQCGT YQMHSLSEAQ DIARHILERD VRVNSNKELA LPKEKLQELH I

References

	« Hide 'large scale' referencesShow 'large scale' references »
[1]	"Salmonella typhimurium luxS gene." Rychlik I., Sevcik M., Sebkova A., Volf J. Submitted (MAY-2000) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
[2]	"Complete genome sequence of Salmonella enterica serovar Typhimurium LT2." McClelland M., Sanderson K.E., Spieth J., Clifton S.W., Latreille P., Courtney L., Porwollik S., Ali J., Dante M., Du F., Hou S., Layman D., Leonard S., Nguyen C., Scott K., Holmes A., Grewal N., Mulvaney E. , Ryan E., Sun H., Florea L., Miller W., Stoneking T., Nhan M., Waterston R., Wilson R.K. Nature 413:852-856(2001) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: LT2 / SGSC1412 / ATCC 700720.

Cross-references

Sequence databases
EMBL GenBank DDBJ	AF268390 Genomic DNA. Translation: AAF73475.1. AE006468 Genomic DNA. Translation: AAL21702.1.
RefSeq	NP_461743.1. NC_003197.1.
3D structure databases
ProteinModelPortal	Q9L4T0.
SMR	Q9L4T0. Positions 3-161.
ModBase	Search...
Protein-protein interaction databases
STRING	99287.STM2817.
Proteomic databases
PaxDb	Q9L4T0.
PRIDE	Q9L4T0.
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
EnsemblBacteria	AAL21702; AAL21702; STM2817.
GeneID	1254340.
KEGG	stm:STM2817.
PATRIC	32384316. VBISalEnt20916_2975.
Phylogenomic databases
eggNOG	COG1854.
HOGENOM	HOG000040371.
KO	K07173.
OMA	KAPYVRV.
ProtClustDB	PRK02260.
Family and domain databases
Gene3D	3.30.1360.80. 1 hit.
HAMAP	MF_00091. LuxS.
InterPro	IPR011249. Metalloenz_LuxS/M16. IPR003815. S-ribosylhomocysteinase. [Graphical view]
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]
SUPFAM	SSF63411. Metalloenz_metal-bd. 1 hit.
ProtoNet	Search...

Entry information

Entry name

LUXS_SALTY

Accession

Primary (citable) accession number: Q9L4T0

Entry history

Integrated into UniProtKB/Swiss-Prot:	August 29, 2001
Last sequence update:	January 23, 2007
Last modified:	May 1, 2013
This is version 76 of the entry and version 3 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program