ID G0GG26_SPITZ Unreviewed; 201 AA.
AC G0GG26;
DT 19-OCT-2011, integrated into UniProtKB/TrEMBL.
DT 19-OCT-2011, sequence version 1.
DT 27-MAR-2024, entry version 74.
DE RecName: Full=LexA repressor {ECO:0000256|HAMAP-Rule:MF_00015};
DE EC=3.4.21.88 {ECO:0000256|HAMAP-Rule:MF_00015};
GN Name=lexA {ECO:0000256|HAMAP-Rule:MF_00015};
GN OrderedLocusNames=Spith_2247 {ECO:0000313|EMBL:AEJ62502.1};
OS Spirochaeta thermophila (strain ATCC 700085 / DSM 6578 / Z-1203).
OC Bacteria; Spirochaetota; Spirochaetia; Spirochaetales; Spirochaetaceae;
OC Spirochaeta.
OX NCBI_TaxID=869211 {ECO:0000313|EMBL:AEJ62502.1, ECO:0000313|Proteomes:UP000007254};
RN [1] {ECO:0000313|EMBL:AEJ62502.1, ECO:0000313|Proteomes:UP000007254}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 700085 / DSM 6578 / Z-1203
RC {ECO:0000313|Proteomes:UP000007254};
RG US DOE Joint Genome Institute (JGI-PGF);
RA Lucas S., Lapidus A., Bruce D., Goodwin L., Pitluck S., Peters L.,
RA Kyrpides N., Mavromatis K., Ivanova N., Mikailova N., Pagani I.,
RA Chertkov O., Detter J.C., Tapia R., Han C., Land M., Hauser L.,
RA Markowitz V., Cheng J.-F., Hugenholtz P., Woyke T., Wu D., Spring S.,
RA Merkhoffer B., Schneider S., Klenk H.-P., Eisen J.A.;
RT "The complete genome of Spirochaeta thermophila DSM 6578.";
RL Submitted (JUN-2011) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Represses a number of genes involved in the response to DNA
CC damage (SOS response), including recA and lexA. In the presence of
CC single-stranded DNA, RecA interacts with LexA causing an autocatalytic
CC cleavage which disrupts the DNA-binding part of LexA, leading to
CC derepression of the SOS regulon and eventually DNA repair.
CC {ECO:0000256|HAMAP-Rule:MF_00015}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=Hydrolysis of Ala-|-Gly bond in repressor LexA.; EC=3.4.21.88;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_00015};
CC -!- SUBUNIT: Homodimer. {ECO:0000256|HAMAP-Rule:MF_00015}.
CC -!- SIMILARITY: Belongs to the peptidase S24 family.
CC {ECO:0000256|ARBA:ARBA00007484, ECO:0000256|HAMAP-Rule:MF_00015,
CC ECO:0000256|RuleBase:RU003991}.
CC -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC feature annotation. {ECO:0000256|HAMAP-Rule:MF_00015}.
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DR EMBL; CP002903; AEJ62502.1; -; Genomic_DNA.
DR RefSeq; WP_014625807.1; NC_017583.1.
DR AlphaFoldDB; G0GG26; -.
DR STRING; 869211.Spith_2247; -.
DR MEROPS; S24.001; -.
DR KEGG; stq:Spith_2247; -.
DR HOGENOM; CLU_066192_45_1_12; -.
DR OrthoDB; 9802364at2; -.
DR Proteomes; UP000007254; Chromosome.
DR GO; GO:0003677; F:DNA binding; IEA:UniProtKB-UniRule.
DR GO; GO:0004252; F:serine-type endopeptidase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0006281; P:DNA repair; IEA:UniProtKB-UniRule.
DR GO; GO:0006260; P:DNA replication; IEA:UniProtKB-UniRule.
DR GO; GO:0045892; P:negative regulation of DNA-templated transcription; IEA:UniProtKB-UniRule.
DR GO; GO:0006508; P:proteolysis; IEA:InterPro.
DR GO; GO:0009432; P:SOS response; IEA:UniProtKB-UniRule.
DR CDD; cd06529; S24_LexA-like; 1.
DR Gene3D; 2.10.109.10; Umud Fragment, subunit A; 1.
DR Gene3D; 1.10.10.10; Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain; 1.
DR HAMAP; MF_00015; LexA; 1.
DR InterPro; IPR006200; LexA.
DR InterPro; IPR039418; LexA-like.
DR InterPro; IPR036286; LexA/Signal_pep-like_sf.
DR InterPro; IPR006199; LexA_DNA-bd_dom.
DR InterPro; IPR006197; Peptidase_S24_LexA.
DR InterPro; IPR015927; Peptidase_S24_S26A/B/C.
DR InterPro; IPR036388; WH-like_DNA-bd_sf.
DR InterPro; IPR036390; WH_DNA-bd_sf.
DR NCBIfam; TIGR00498; lexA; 1.
DR PANTHER; PTHR33516; LEXA REPRESSOR; 1.
DR PANTHER; PTHR33516:SF2; LEXA REPRESSOR; 1.
DR Pfam; PF01726; LexA_DNA_bind; 1.
DR Pfam; PF00717; Peptidase_S24; 1.
DR PRINTS; PR00726; LEXASERPTASE.
DR SUPFAM; SSF51306; LexA/Signal peptidase; 1.
DR SUPFAM; SSF46785; Winged helix' DNA-binding domain; 1.
PE 3: Inferred from homology;
KW Autocatalytic cleavage {ECO:0000256|ARBA:ARBA00022813, ECO:0000256|HAMAP-
KW Rule:MF_00015};
KW DNA damage {ECO:0000256|ARBA:ARBA00022763, ECO:0000256|HAMAP-
KW Rule:MF_00015};
KW DNA repair {ECO:0000256|ARBA:ARBA00023204, ECO:0000256|HAMAP-
KW Rule:MF_00015};
KW DNA replication {ECO:0000256|ARBA:ARBA00022705, ECO:0000256|HAMAP-
KW Rule:MF_00015};
KW DNA-binding {ECO:0000256|ARBA:ARBA00023125, ECO:0000256|HAMAP-
KW Rule:MF_00015};
KW Hydrolase {ECO:0000256|ARBA:ARBA00022801, ECO:0000256|HAMAP-Rule:MF_00015};
KW Reference proteome {ECO:0000313|Proteomes:UP000007254};
KW Repressor {ECO:0000256|ARBA:ARBA00022491, ECO:0000256|HAMAP-Rule:MF_00015};
KW SOS response {ECO:0000256|ARBA:ARBA00023236, ECO:0000256|HAMAP-
KW Rule:MF_00015};
KW Transcription {ECO:0000256|ARBA:ARBA00023163, ECO:0000256|HAMAP-
KW Rule:MF_00015};
KW Transcription regulation {ECO:0000256|ARBA:ARBA00023015, ECO:0000256|HAMAP-
KW Rule:MF_00015}.
FT DOMAIN 3..65
FT /note="LexA repressor DNA-binding"
FT /evidence="ECO:0000259|Pfam:PF01726"
FT DOMAIN 80..194
FT /note="Peptidase S24/S26A/S26B/S26C"
FT /evidence="ECO:0000259|Pfam:PF00717"
FT ACT_SITE 124
FT /note="For autocatalytic cleavage activity"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00015"
FT ACT_SITE 161
FT /note="For autocatalytic cleavage activity"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00015"
FT SITE 87..88
FT /note="Cleavage; by autolysis"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00015"
SQ SEQUENCE 201 AA; 22914 MW; 4CC13F63F20A4A34 CRC64;
MKEQLTTRQK EVLSFIQRFR ELHGYVPSYR EIARHFSVNV RAIYDVLNAL KEKGYIRHSP
HKSRALEIVE EDPPPVVYLP LVGEVAAGKP LLAEEHIEGE VVVPESFLPR GGGRFFVLRV
KGESMEGAGI LKGDLAIIRE QDWAVDGEIV VALLEENATL KRFFKEKHRI RLESSHPSYP
PIYTTQVKIL GKLVSIVRTY E
//
