P0C0C7 (LUXS_STRPY) 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

Organism

Streptococcus pyogenes

Taxonomic identifier

1314 [NCBI]

Taxonomic lineage

cellular organisms › Bacteria › Firmicutes › Bacilli › Lactobacillales › Streptococcaceae › Streptococcus

Protein attributes

Sequence length	160 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-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. HAMAP-Rule MF_00091
Subunit structure	Homodimer By similarity. HAMAP-Rule MF_00091
Sequence similarities	Belongs to the LuxS family.
Sequence caution	The sequence AAG28749.1 differs from that shown. Reason: Erroneous initiation.

Ontologies

Keywords
Biological process	Autoinducer synthesis Quorum sensing
Ligand	Iron Metal-binding
Molecular function	Lyase
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
	Chain	1 – 160	160	S-ribosylhomocysteine lyase HAMAP-Rule MF_00091		PRO_0000172267
Sites
	Metal binding	57	1	Iron By similarity
	Metal binding	61	1	Iron By similarity
	Metal binding	127	1	Iron By similarity

Sequences

	Sequence		Length	Mass (Da)
	P0C0C7 [UniParc]. Last modified September 13, 2005. Version 1. Checksum: A45592396C76BD21	FASTA	160	17,979
	10 20 30 40 50 60 MTKEVIVESF ELDHTIVKAP YVRLISEEFG PKGDRITNFD VRLVQPNQNS IETAGLHTIE 70 80 90 100 110 120 HLLAKLIRQR IDGMIDCSPF GCRTGFHLIM WGKHSSTDIA KVIKSSLEEI ATGITWEDVP 130 140 150 160 GTTLESCGNY KDHSLFAAKE WAQLIIDQGI SDDPFSRHVI

References

[1]	"Mutation of luxS affects growth and virulence factor expression in Streptococcus pyogenes." Lyon W.R., Madden J.C., Levin J.C., Stein J.L., Caparon M.G. Mol. Microbiol. 42:145-157(2001) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].

Cross-references

Sequence databases
EMBL GenBank DDBJ	AF295118 Genomic DNA. Translation: AAG28749.1. Different initiation.
3D structure databases
ProteinModelPortal	P0C0C7.
ModBase	Search...
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Phylogenomic databases
eggNOG	COG1854.
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_STRPY

Accession

Primary (citable) accession number: P0C0C7
Secondary accession number(s): P0A3P7, Q99YL7, Q9EVB4

Entry history

Integrated into UniProtKB/Swiss-Prot:	September 13, 2005
Last sequence update:	September 13, 2005
Last modified:	April 3, 2013
This is version 34 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program