ID W6FV75_NODSP Unreviewed; 208 AA.
AC W6FV75;
DT 16-APR-2014, integrated into UniProtKB/TrEMBL.
DT 16-APR-2014, sequence version 1.
DT 24-JAN-2024, entry version 52.
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 ORFNames=NSP_2320 {ECO:0000313|EMBL:AHJ26588.1};
OS Nodularia spumigena CCY9414.
OC Bacteria; Cyanobacteriota; Cyanophyceae; Nostocales; Aphanizomenonaceae;
OC Nodularia.
OX NCBI_TaxID=313624 {ECO:0000313|EMBL:AHJ26588.1, ECO:0000313|Proteomes:UP000019325};
RN [1] {ECO:0000313|EMBL:AHJ26588.1, ECO:0000313|Proteomes:UP000019325}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=CCY9414 {ECO:0000313|EMBL:AHJ26588.1};
RX PubMed=23555932;
RA Voss B., Bolhuis H., Fewer D.P., Kopf M., Moke F., Haas F., El-Shehawy R.,
RA Hayes P., Bergman B., Sivonen K., Dittmann E., Scanlan D.J., Hagemann M.,
RA Stal L.J., Hess W.R.;
RT "Insights into the physiology and ecology of the brackish-water-adapted
RT Cyanobacterium Nodularia spumigena CCY9414 based on a genome-transcriptome
RT analysis.";
RL PLoS ONE 8:E60224-E60224(2013).
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. {ECO:0000256|HAMAP-
CC Rule:MF_00015}.
CC ---------------------------------------------------------------------------
CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC ---------------------------------------------------------------------------
DR EMBL; CP007203; AHJ26588.1; -; Genomic_DNA.
DR AlphaFoldDB; W6FV75; -.
DR STRING; 313624.NSP_2320; -.
DR MEROPS; S24.001; -.
DR PATRIC; fig|313624.11.peg.231; -.
DR eggNOG; COG1974; Bacteria.
DR HOGENOM; CLU_066192_45_2_3; -.
DR Proteomes; UP000019325; 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:UniProtKB-KW.
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; 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 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|HAMAP-Rule:MF_00015};
KW DNA damage {ECO:0000256|HAMAP-Rule:MF_00015};
KW DNA repair {ECO:0000256|HAMAP-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|HAMAP-Rule:MF_00015, ECO:0000313|EMBL:AHJ26588.1};
KW Protease {ECO:0000313|EMBL:AHJ26588.1};
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 9..73
FT /note="LexA repressor DNA-binding"
FT /evidence="ECO:0000259|Pfam:PF01726"
FT DOMAIN 85..202
FT /note="Peptidase S24/S26A/S26B/S26C"
FT /evidence="ECO:0000259|Pfam:PF00717"
FT DNA_BIND 36..56
FT /note="H-T-H motif"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00015"
FT ACT_SITE 126
FT /note="For autocatalytic cleavage activity"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00015"
FT ACT_SITE 167
FT /note="For autocatalytic cleavage activity"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00015"
FT SITE 92..93
FT /note="Cleavage; by autolysis"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00015"
SQ SEQUENCE 208 AA; 23543 MW; 76763AE8946D7F53 CRC64;
MYLIPNKFME RLTEAQQQLY DWLVEYIKIH QYSPSIRQMM EAMKLKSPAP IQSRLEHLRT
KGYIDWNEGK ARTIRILHPV KQGIPILGTI AAGGLIEPFT DAIDHLDFSH VSLPPQSYGL
RVAGDSMIED LIADGDLVFL HPVLEPDQLK NGTIVAARVD GYGTTLKRFY RQGDRVTLKP
ANSKYKPIEV LATQVQVQGS LVGVWRGY
//
