ID   LUXS_GEOTN              Reviewed;         158 AA.
AC   A4IS03;
DT   21-AUG-2007, integrated into UniProtKB/Swiss-Prot.
DT   21-AUG-2007, sequence version 2.
DT   02-SEP-2026, entry version 86.
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};
GN   OrderedLocusNames=GTNG_2762;
OS   Geobacillus thermodenitrificans (strain NG80-2).
OC   Bacteria; Bacillati; Bacillota; Bacilli; Caryophanales; Anoxybacillaceae;
OC   Geobacillus.
OX   NCBI_TaxID=420246;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=NG80-2;
RX   PubMed=17372208; DOI=10.1073/pnas.0609650104;
RA   Feng L., Wang W., Cheng J., Ren Y., Zhao G., Gao C., Tang Y., Liu X.,
RA   Han W., Peng X., Liu R., Wang L.;
RT   "Genome and proteome of long-chain alkane degrading Geobacillus
RT   thermodenitrificans NG80-2 isolated from a deep-subsurface oil reservoir.";
RL   Proc. Natl. Acad. Sci. U.S.A. 104:5602-5607(2007).
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; Evidence={ECO:0000255|HAMAP-
CC         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}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=ABO68107.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR   EMBL; CP000557; ABO68107.1; ALT_INIT; Genomic_DNA.
DR   RefSeq; WP_008880964.1; NC_009328.1.
DR   AlphaFoldDB; A4IS03; -.
DR   SMR; A4IS03; -.
DR   GeneID; 87623095; -.
DR   KEGG; gtn:GTNG_2762; -.
DR   eggNOG; COG1854; Bacteria.
DR   HOGENOM; CLU_107531_1_0_9; -.
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; S-ribosylhomocysteinase (LuxS); 1.
DR   HAMAP; MF_00091; LuxS; 1.
DR   InterPro; IPR037005; LuxS_sf.
DR   InterPro; IPR011249; Metalloenz_LuxS/M16.
DR   InterPro; IPR003815; S-ribosylhomocysteinase.
DR   NCBIfam; NF002603; PRK02260.1-3; 1.
DR   NCBIfam; NF002604; PRK02260.1-4; 1.
DR   PANTHER; PTHR35799; S-RIBOSYLHOMOCYSTEINE LYASE; 1.
DR   PANTHER; PTHR35799:SF1; S-RIBOSYLHOMOCYSTEINE LYASE; 1.
DR   Pfam; PF02664; LuxS; 1.
DR   PIRSF; PIRSF006160; AI2; 1.
DR   PRINTS; PR01487; LUXSPROTEIN.
DR   SUPFAM; SSF63411; LuxS/MPP-like metallohydrolase; 1.
PE   3: Inferred from homology;
KW   Autoinducer synthesis; Iron; Lyase; Metal-binding; Quorum sensing.
FT   CHAIN           1..158
FT                   /note="S-ribosylhomocysteine lyase"
FT                   /id="PRO_0000297998"
FT   BINDING         55
FT                   /ligand="Fe cation"
FT                   /ligand_id="ChEBI:CHEBI:24875"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00091"
FT   BINDING         59
FT                   /ligand="Fe cation"
FT                   /ligand_id="ChEBI:CHEBI:24875"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00091"
FT   BINDING         127
FT                   /ligand="Fe cation"
FT                   /ligand_id="ChEBI:CHEBI:24875"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00091"
SQ   SEQUENCE   158 AA;  17744 MW;  4507CC34DDC964B9 CRC64;
     MPSPVESFEL DHCAVKAPYV RHCGVHKIGS DGVVNKFDIR FCQPNKEAMD PAAIHTLEHL
     LAYTLRKHVT KYDHFDIIDI SPMGCQTGFY LVVSGSPTVD EIIDLLEETM KDALNATEVP
     AATERQCGQA KLHDLEAAKE LMRFWLSQEK SELKKVFG
//