ID G9YHY3_9FIRM Unreviewed; 211 AA.
AC G9YHY3;
DT 22-FEB-2012, integrated into UniProtKB/TrEMBL.
DT 22-FEB-2012, sequence version 1.
DT 24-JAN-2024, entry version 63.
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=HMPREF0080_01266 {ECO:0000313|EMBL:EHM40353.1};
OS Anaeroglobus geminatus F0357.
OC Bacteria; Bacillota; Negativicutes; Veillonellales; Veillonellaceae;
OC Anaeroglobus.
OX NCBI_TaxID=861450 {ECO:0000313|EMBL:EHM40353.1, ECO:0000313|Proteomes:UP000005481};
RN [1] {ECO:0000313|EMBL:EHM40353.1, ECO:0000313|Proteomes:UP000005481}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=F0357 {ECO:0000313|EMBL:EHM40353.1,
RC ECO:0000313|Proteomes:UP000005481};
RA Weinstock G., Sodergren E., Clifton S., Fulton L., Fulton B., Courtney L.,
RA Fronick C., Harrison M., Strong C., Farmer C., Delahaunty K., Markovic C.,
RA Hall O., Minx P., Tomlinson C., Mitreva M., Hou S., Chen J., Wollam A.,
RA Pepin K.H., Johnson M., Bhonagiri V., Zhang X., Suruliraj S., Warren W.,
RA Chinwalla A., Mardis E.R., Wilson R.K.;
RL Submitted (AUG-2011) 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}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:EHM40353.1}.
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DR EMBL; AGCJ01000047; EHM40353.1; -; Genomic_DNA.
DR AlphaFoldDB; G9YHY3; -.
DR STRING; 861450.HMPREF0080_01266; -.
DR MEROPS; S24.001; -.
DR PATRIC; fig|861450.3.peg.1182; -.
DR eggNOG; COG1974; Bacteria.
DR HOGENOM; CLU_066192_45_1_9; -.
DR Proteomes; UP000005481; 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:UP000005481};
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 12..74
FT /note="LexA repressor DNA-binding"
FT /evidence="ECO:0000259|Pfam:PF01726"
FT DOMAIN 93..204
FT /note="Peptidase S24/S26A/S26B/S26C"
FT /evidence="ECO:0000259|Pfam:PF00717"
FT DNA_BIND 38..58
FT /note="H-T-H motif"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00015"
FT ACT_SITE 135
FT /note="For autocatalytic cleavage activity"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00015"
FT ACT_SITE 172
FT /note="For autocatalytic cleavage activity"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00015"
FT SITE 100..101
FT /note="Cleavage; by autolysis"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00015"
SQ SEQUENCE 211 AA; 23832 MW; 16875FFC0B53121B CRC64;
MGVVKNMLNS ETSLTTRQRQ ILEYIRKCVH MYGYPPSVRE ICSEVGLSST STVHGYLTDL
ENLGFIRRDP AKNRKIELLD EGSWRSKKVV PLPLIGAIRA GAPILAEECI EDVYPFAAEF
VGEDDCFMLT VRGDSMKDAG ILEGDLLIVR QQDMARNGQI VVALLEDEAT VKRYYMEKDH
IRLQPENDAY DPIITRNCKL LGVVTGVFRT Y
//
