LEXA_YERPN
ID LEXA_YERPN Reviewed; 202 AA.
AC Q1CE98; C4GY74;
DT 15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT 11-JUL-2006, sequence version 1.
DT 03-AUG-2022, entry version 97.
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}; OrderedLocusNames=YPN_3355;
GN ORFNames=YP516_3813;
OS Yersinia pestis bv. Antiqua (strain Nepal516).
OC Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC Yersiniaceae; Yersinia.
OX NCBI_TaxID=377628;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Nepal516;
RX PubMed=16740952; DOI=10.1128/jb.00124-06;
RA Chain P.S.G., Hu P., Malfatti S.A., Radnedge L., Larimer F., Vergez L.M.,
RA Worsham P., Chu M.C., Andersen G.L.;
RT "Complete genome sequence of Yersinia pestis strains Antiqua and Nepal516:
RT evidence of gene reduction in an emerging pathogen.";
RL J. Bacteriol. 188:4453-4463(2006).
RN [2]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Nepal516;
RA Plunkett G. III, Anderson B.D., Baumler D.J., Burland V., Cabot E.L.,
RA Glasner J.D., Mau B., Neeno-Eckwall E., Perna N.T., Munk A.C., Tapia R.,
RA Green L.D., Rogers Y.C., Detter J.C., Bruce D.C., Brettin T.S.;
RT "Yersinia pestis Nepal516A whole genome shotgun sequencing project.";
RL Submitted (APR-2009) 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. Binds to the 16 bp
CC palindromic sequence 5'-CTGTATATATATACAG-3'. In the presence of single-
CC 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; CP000305; ABG19682.1; -; Genomic_DNA.
DR EMBL; ACNQ01000017; EEO75874.1; -; Genomic_DNA.
DR RefSeq; WP_002209090.1; NZ_ACNQ01000017.1.
DR AlphaFoldDB; Q1CE98; -.
DR SMR; Q1CE98; -.
DR EnsemblBacteria; ABG19682; ABG19682; YPN_3355.
DR GeneID; 66843215; -.
DR KEGG; ypn:YPN_3355; -.
DR HOGENOM; CLU_066192_45_3_6; -.
DR OMA; HVWLLPH; -.
DR Proteomes; UP000008936; 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 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_1000001356"
FT DNA_BIND 28..48
FT /note="H-T-H motif"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00015"
FT ACT_SITE 119
FT /note="For autocatalytic cleavage activity"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00015"
FT ACT_SITE 156
FT /note="For autocatalytic cleavage activity"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00015"
FT SITE 84..85
FT /note="Cleavage; by autolysis"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00015"
SQ SEQUENCE 202 AA; 22365 MW; 26F561FBBF9FFFB4 CRC64;
MKALTTRQQE VYDLVRDHLA QTGMPPTRAE IAQRLGFRSP NAAEEHLKAL ARKGVIEIVS
GASRGIRLLM EEEEGLPLIG RVAAGEPLLA QQHIEGHYKV DPSLFKPGAD FLLRVNGMSM
RDIGILDGDL LAVHKTQDVR NGQVVVARID DEVTVKRLKK QGNIVHLLPE NSEFQPIVVD
LREQSFTIEG LAVGVIRNGD WI
