ID   LUXS_LIMRD              Reviewed;         158 AA.
AC   A5VLV3;
DT   05-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   10-JUL-2007, sequence version 1.
DT   03-AUG-2022, entry version 87.
DE   RecName: Full=S-ribosylhomocysteine lyase {ECO:0000255|HAMAP-Rule:MF_00091};
DE            EC=4.4.1.21 {ECO:0000255|HAMAP-Rule:MF_00091};
DE   AltName: Full=AI-2 synthesis protein {ECO:0000255|HAMAP-Rule:MF_00091};
DE   AltName: Full=Autoinducer-2 production protein LuxS {ECO:0000255|HAMAP-Rule:MF_00091};
GN   Name=luxS {ECO:0000255|HAMAP-Rule:MF_00091}; OrderedLocusNames=Lreu_1586;
OS   Limosilactobacillus reuteri (strain DSM 20016) (Lactobacillus reuteri).
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Lactobacillaceae;
OC   Limosilactobacillus.
OX   NCBI_TaxID=557436;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 20016;
RX   PubMed=21379339; DOI=10.1371/journal.pgen.1001314;
RA   Frese S.A., Benson A.K., Tannock G.W., Loach D.M., Kim J., Zhang M.,
RA   Oh P.L., Heng N.C., Patil P.B., Juge N., Mackenzie D.A., Pearson B.M.,
RA   Lapidus A., Dalin E., Tice H., Goltsman E., Land M., Hauser L., Ivanova N.,
RA   Kyrpides N.C., Walter J.;
RT   "The evolution of host specialization in the vertebrate gut symbiont
RT   Lactobacillus reuteri.";
RL   PLoS Genet. 7:E1001314-E1001314(2011).
CC   -!- FUNCTION: Involved in the synthesis of autoinducer 2 (AI-2) which is
CC       secreted by bacteria and is used to communicate both the cell density
CC       and the metabolic potential of the environment. The regulation of gene
CC       expression in response to changes in cell density is called quorum
CC       sensing. Catalyzes the transformation of S-ribosylhomocysteine (RHC) to
CC       homocysteine (HC) and 4,5-dihydroxy-2,3-pentadione (DPD).
CC       {ECO:0000255|HAMAP-Rule:MF_00091}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=S-(5-deoxy-D-ribos-5-yl)-L-homocysteine = (S)-4,5-
CC         dihydroxypentane-2,3-dione + L-homocysteine; Xref=Rhea:RHEA:17753,
CC         ChEBI:CHEBI:29484, ChEBI:CHEBI:58195, ChEBI:CHEBI:58199; EC=4.4.1.21;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00091};
CC   -!- COFACTOR:
CC       Name=Fe cation; Xref=ChEBI:CHEBI:24875;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00091};
CC       Note=Binds 1 Fe cation per subunit. {ECO:0000255|HAMAP-Rule:MF_00091};
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_00091}.
CC   -!- SIMILARITY: Belongs to the LuxS family. {ECO:0000255|HAMAP-
CC       Rule:MF_00091}.
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DR   EMBL; CP000705; ABQ83827.1; -; Genomic_DNA.
DR   RefSeq; WP_003668959.1; NZ_AZDD01000055.1.
DR   AlphaFoldDB; A5VLV3; -.
DR   SMR; A5VLV3; -.
DR   STRING; 557436.Lreu_1586; -.
DR   PRIDE; A5VLV3; -.
DR   EnsemblBacteria; ABQ83827; ABQ83827; Lreu_1586.
DR   GeneID; 66471759; -.
DR   KEGG; lre:Lreu_1586; -.
DR   PATRIC; fig|557436.17.peg.1622; -.
DR   eggNOG; COG1854; Bacteria.
DR   HOGENOM; CLU_107531_2_1_9; -.
DR   OMA; GPMGCLT; -.
DR   Proteomes; UP000001991; Chromosome.
DR   GO; GO:0005506; F:iron ion binding; IEA:InterPro.
DR   GO; GO:0043768; F:S-ribosylhomocysteine lyase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0009372; P:quorum sensing; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.30.1360.80; -; 1.
DR   HAMAP; MF_00091; LuxS; 1.
DR   InterPro; IPR037005; LuxS_sf.
DR   InterPro; IPR011249; Metalloenz_LuxS/M16.
DR   InterPro; IPR003815; S-ribosylhomocysteinase.
DR   PANTHER; PTHR35799; PTHR35799; 1.
DR   Pfam; PF02664; LuxS; 1.
DR   PIRSF; PIRSF006160; AI2; 1.
DR   PRINTS; PR01487; LUXSPROTEIN.
DR   SUPFAM; SSF63411; SSF63411; 1.
PE   3: Inferred from homology;
KW   Autoinducer synthesis; Iron; Lyase; Metal-binding; Quorum sensing;
KW   Reference proteome.
FT   CHAIN           1..158
FT                   /note="S-ribosylhomocysteine lyase"
FT                   /id="PRO_1000057608"
FT   BINDING         54
FT                   /ligand="Fe cation"
FT                   /ligand_id="ChEBI:CHEBI:24875"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00091"
FT   BINDING         58
FT                   /ligand="Fe cation"
FT                   /ligand_id="ChEBI:CHEBI:24875"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00091"
FT   BINDING         124
FT                   /ligand="Fe cation"
FT                   /ligand_id="ChEBI:CHEBI:24875"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00091"
SQ   SEQUENCE   158 AA;  17695 MW;  183C7DDE02A81BD5 CRC64;
     MAKVESFTLD HTKVKAPYVR LITVEEGPKG DKISNYDLRL VQPNENAIPT AGLHTIEHLL
     AGLLRDRLGG VIDCSPFGCR TGFHLITWGE HSTTEVAKAL KSSLEEIAYK TKWEDVQGTT
     IESCGNYRDH SLFSAKEWSK KILDEGISDK PFERHVVD