ID D8JZA0_HYPDA Unreviewed; 239 AA.
AC D8JZA0;
DT 05-OCT-2010, integrated into UniProtKB/TrEMBL.
DT 05-OCT-2010, sequence version 1.
DT 27-MAR-2024, entry version 79.
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=Hden_1901 {ECO:0000313|EMBL:ADJ23702.1};
OS Hyphomicrobium denitrificans (strain ATCC 51888 / DSM 1869 / NCIMB 11706 /
OS TK 0415).
OC Bacteria; Pseudomonadota; Alphaproteobacteria; Hyphomicrobiales;
OC Hyphomicrobiaceae; Hyphomicrobium.
OX NCBI_TaxID=582899 {ECO:0000313|EMBL:ADJ23702.1, ECO:0000313|Proteomes:UP000002033};
RN [1] {ECO:0000313|Proteomes:UP000002033}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 51888 / DSM 1869 / NCIB 11706 / TK 0415
RC {ECO:0000313|Proteomes:UP000002033};
RX PubMed=21705585; DOI=10.1128/JB.05453-11;
RG US DOE Joint Genome Institute;
RA Brown P.J., Kysela D.T., Buechlein A., Hemmerich C., Brun Y.V.;
RT "Genome sequences of eight morphologically diverse alphaproteobacteria.";
RL J. Bacteriol. 193:4567-4568(2011).
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; CP002083; ADJ23702.1; -; Genomic_DNA.
DR RefSeq; WP_013215861.1; NC_014313.1.
DR AlphaFoldDB; D8JZA0; -.
DR STRING; 582899.Hden_1901; -.
DR MEROPS; S24.001; -.
DR KEGG; hdn:Hden_1901; -.
DR eggNOG; COG1974; Bacteria.
DR HOGENOM; CLU_066192_45_2_5; -.
DR OrthoDB; 9802364at2; -.
DR Proteomes; UP000002033; 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:UP000002033};
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 118..233
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 160
FT /note="For autocatalytic cleavage activity"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00015"
FT ACT_SITE 198
FT /note="For autocatalytic cleavage activity"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00015"
FT SITE 125..126
FT /note="Cleavage; by autolysis"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00015"
SQ SEQUENCE 239 AA; 26121 MW; AFABB945497075A4 CRC64;
MLTEKQKDLL MFIHERMQER GVPPSFDEMK DALDLRSKSG IHRLITALVE RGFIRRLPHR
ARAIEVIKLP ENQIAAATSA TPAAPRGFQP SVITGTGPKQ NVTPPPSHVI DARTVSVPVM
GRIAAGTPIS AIQNHTHDIA VSPDILTNGE HFALEVKGDS MIEAGIHDGD TVIVRRCNTA
ENGDIIVALV EGEEATLKRL RKKGSTIALE AANPEFKTRI FGPDQVDIQG RLVGLLRRY
//
