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Database: UniProt
Entry: A0A0M7B3V8_9RHOB
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ID   A0A0M7B3V8_9RHOB        Unreviewed;       232 AA.
AC   A0A0M7B3V8;
DT   09-DEC-2015, integrated into UniProtKB/TrEMBL.
DT   09-DEC-2015, sequence version 1.
DT   24-JAN-2024, entry version 35.
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   ECO:0000313|EMBL:CUH10644.1};
GN   ORFNames=JSE7799_00150 {ECO:0000313|EMBL:CUH10644.1};
OS   Jannaschia seosinensis.
OC   Bacteria; Pseudomonadota; Alphaproteobacteria; Rhodobacterales;
OC   Roseobacteraceae; Jannaschia.
OX   NCBI_TaxID=313367 {ECO:0000313|EMBL:CUH10644.1, ECO:0000313|Proteomes:UP000049455};
RN   [1] {ECO:0000313|EMBL:CUH10644.1, ECO:0000313|Proteomes:UP000049455}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=CECT 7799 {ECO:0000313|EMBL:CUH10644.1,
RC   ECO:0000313|Proteomes:UP000049455};
RA   Jackson K.R., Lunt B.L., Fisher J.N.B., Gardner A.V., Bailey M.E.,
RA   Deus L.M., Earl A.S., Gibby P.D., Hartmann K.A., Liu J.E., Manci A.M.,
RA   Nielsen D.A., Solomon M.B., Breakwell D.P., Burnett S.H., Grose J.H.;
RL   Submitted (SEP-2015) 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}.
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DR   EMBL; CYPR01000009; CUH10644.1; -; Genomic_DNA.
DR   RefSeq; WP_055661887.1; NZ_CYPR01000009.1.
DR   AlphaFoldDB; A0A0M7B3V8; -.
DR   STRING; 313367.JSE7799_00150; -.
DR   OrthoDB; 9802364at2; -.
DR   Proteomes; UP000049455; Unassembled WGS sequence.
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:UP000049455};
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          2..63
FT                   /note="LexA repressor DNA-binding"
FT                   /evidence="ECO:0000259|Pfam:PF01726"
FT   DOMAIN          110..226
FT                   /note="Peptidase S24/S26A/S26B/S26C"
FT                   /evidence="ECO:0000259|Pfam:PF00717"
FT   DNA_BIND        26..46
FT                   /note="H-T-H motif"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00015"
FT   ACT_SITE        153
FT                   /note="For autocatalytic cleavage activity"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00015"
FT   ACT_SITE        191
FT                   /note="For autocatalytic cleavage activity"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00015"
FT   SITE            117..118
FT                   /note="Cleavage; by autolysis"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00015"
SQ   SEQUENCE   232 AA;  25674 MW;  02C6197E2ABDE528 CRC64;
     MLTRKQRDLL EFIHKRMQRD GVPPSFDEMK DALDLRSKSG IHRLITALEE RGFIRRLAHR
     ARAIEIVRLP EGMNGDKFVP KLIDGDGAAQ TSTPGVASAM PVRVDATELP VMGRIAAGVP
     IEAITEVSHH VAVPGQMLDR GGEHYALEVK GDSMIDAGIN DGDVVVIREQ DMADNGDIVV
     ALIEGHEATL KRYRRQKGMI ALEAANPAYE TRLLRENQVR IQGRLVGLIR SY
//
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