LEXA_PSEPU
ID LEXA_PSEPU Reviewed; 202 AA.
AC P0A154; P37453; Q9EUU0;
DT 01-MAR-2005, integrated into UniProtKB/Swiss-Prot.
DT 01-MAR-2005, sequence version 1.
DT 03-AUG-2022, entry version 82.
DE RecName: Full=LexA repressor {ECO:0000255|HAMAP-Rule:MF_00015};
DE EC=3.4.21.88 {ECO:0000255|HAMAP-Rule:MF_00015};
GN Name=lexA {ECO:0000255|HAMAP-Rule:MF_00015};
OS Pseudomonas putida (Arthrobacter siderocapsulatus).
OC Bacteria; Proteobacteria; Gammaproteobacteria; Pseudomonadales;
OC Pseudomonadaceae; Pseudomonas.
OX NCBI_TaxID=303;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC STRAIN=ATCC 33015 / DSM 3931 / JCM 6156 / NCIMB 12182 / mt-2;
RX PubMed=1494343; DOI=10.1007/bf00279651;
RA Garriga X., Calero S., Barbe J.;
RT "Nucleotide sequence analysis and comparison of the lexA genes from
RT Salmonella typhimurium, Erwinia carotovora, Pseudomonas aeruginosa and
RT Pseudomonas putida.";
RL Mol. Gen. Genet. 236:125-134(1992).
RN [2]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC STRAIN=WCS358;
RX PubMed=11371535; DOI=10.1128/jb.183.12.3712-3720.2001;
RA Kojic M., Venturi V.;
RT "Regulation of rpoS gene expression in Pseudomonas: involvement of a TetR
RT family regulator.";
RL J. Bacteriol. 183:3712-3720(2001).
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:0000255|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:0000255|HAMAP-Rule:MF_00015};
CC -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_00015}.
CC -!- SIMILARITY: Belongs to the peptidase S24 family. {ECO:0000255|HAMAP-
CC Rule:MF_00015}.
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DR EMBL; X63017; CAA44749.1; -; Genomic_DNA.
DR EMBL; AJ293485; CAC17802.1; -; Genomic_DNA.
DR PIR; S30164; S30164.
DR RefSeq; WP_010953131.1; NZ_VCPS01000016.1.
DR AlphaFoldDB; P0A154; -.
DR SMR; P0A154; -.
DR STRING; 1240350.AMZE01000108_gene934; -.
DR MEROPS; S24.001; -.
DR eggNOG; COG1974; Bacteria.
DR OMA; HVWLLPH; -.
DR BRENDA; 3.4.21.88; 5092.
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 transcription, DNA-templated; 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; 1.10.10.10; -; 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 Pfam; PF01726; LexA_DNA_bind; 1.
DR Pfam; PF00717; Peptidase_S24; 1.
DR PRINTS; PR00726; LEXASERPTASE.
DR SUPFAM; SSF46785; SSF46785; 1.
DR SUPFAM; SSF51306; SSF51306; 1.
DR TIGRFAMs; TIGR00498; lexA; 1.
PE 3: Inferred from homology;
KW Autocatalytic cleavage; DNA damage; DNA repair; DNA replication;
KW DNA-binding; Hydrolase; Repressor; SOS response; Transcription;
KW Transcription regulation.
FT CHAIN 1..202
FT /note="LexA repressor"
FT /id="PRO_0000170070"
FT DNA_BIND 28..48
FT /note="H-T-H motif"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00015"
FT ACT_SITE 123
FT /note="For autocatalytic cleavage activity"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00015"
FT ACT_SITE 160
FT /note="For autocatalytic cleavage activity"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00015"
FT SITE 88..89
FT /note="Cleavage; by autolysis"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00015"
FT CONFLICT 73
FT /note="A -> T (in Ref. 2; CAC17802)"
FT /evidence="ECO:0000305"
FT CONFLICT 78
FT /note="A -> N (in Ref. 2; CAC17802)"
FT /evidence="ECO:0000305"
FT CONFLICT 107
FT /note="A -> S (in Ref. 2; CAC17802)"
FT /evidence="ECO:0000305"
FT CONFLICT 112
FT /note="Q -> H (in Ref. 2; CAC17802)"
FT /evidence="ECO:0000305"
FT CONFLICT 167
FT /note="S -> T (in Ref. 2; CAC17802)"
FT /evidence="ECO:0000305"
SQ SEQUENCE 202 AA; 22148 MW; EF43C178C97D0679 CRC64;
MLKLTPRQAE ILAFIKRCLE DNGFPPTRAE IAQELGFKSP NAAEEHLKAL ARKGAIEMTP
GASRGIRIPG LEAKAEEAGL PIIGRVAAGA PILAEQHIEQ SCNINPAFFH PQADYLLRVH
GMSMKDVGIF DGDLLAVHTC REARNGQIVV ARIGDEVTVK RFKREGSKVW LLAENPEFAP
IEVDLKEQEL VIEGLSVGVI RR