ID A0A2Z6EU84_9BURK Unreviewed; 217 AA.
AC A0A2Z6EU84;
DT 10-OCT-2018, integrated into UniProtKB/TrEMBL.
DT 10-OCT-2018, sequence version 1.
DT 27-MAR-2024, entry version 20.
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 ECO:0000313|EMBL:GLR00324.1};
GN ORFNames=GCM10007934_01350 {ECO:0000313|EMBL:GLR00324.1}, MCB1EB_0848
GN {ECO:0000313|EMBL:BBE09009.1};
OS Mycoavidus cysteinexigens.
OC Bacteria; Pseudomonadota; Betaproteobacteria; Burkholderiales;
OC Burkholderiaceae; Mycoavidus.
OX NCBI_TaxID=1553431 {ECO:0000313|EMBL:BBE09009.1, ECO:0000313|Proteomes:UP000282597};
RN [1] {ECO:0000313|EMBL:BBE09009.1, ECO:0000313|Proteomes:UP000282597}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=B1-EB {ECO:0000313|EMBL:BBE09009.1,
RC ECO:0000313|Proteomes:UP000282597};
RX PubMed=29540638; DOI=10.1264/jsme2.ME17138;
RA Sharmin D., Guo Y., Nishizawa T., Ohshima S., Sato Y., Takashima Y.,
RA Narisawa K., Ohta H.;
RT "Comparative Genomic Insights into Endofungal Lifestyles of Two Bacterial
RT Endosymbionts, Mycoavidus cysteinexigens and Burkholderia rhizoxinica.";
RL Microbes Environ. 33:66-76(2018).
RN [2] {ECO:0000313|EMBL:GLR00324.1}
RP NUCLEOTIDE SEQUENCE.
RC STRAIN=NBRC 110909 {ECO:0000313|EMBL:GLR00324.1};
RX PubMed=30832757;
RA Wu L., Ma J.;
RT "The Global Catalogue of Microorganisms (GCM) 10K type strain sequencing
RT project: providing services to taxonomists for standard genome sequencing
RT and annotation.";
RL Int. J. Syst. Evol. Microbiol. 69:895-898(2019).
RN [3] {ECO:0000313|EMBL:GLR00324.1}
RP NUCLEOTIDE SEQUENCE.
RC STRAIN=NBRC 110909 {ECO:0000313|EMBL:GLR00324.1};
RA Sun Q., Mori K.;
RT "Draft genome sequence of Mycoavidus cysteinexigens strain NBRC 110909.";
RL Submitted (JAN-2023) 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}.
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DR EMBL; AP018150; BBE09009.1; -; Genomic_DNA.
DR EMBL; BSOD01000001; GLR00324.1; -; Genomic_DNA.
DR RefSeq; WP_026920788.1; NZ_BSOD01000001.1.
DR AlphaFoldDB; A0A2Z6EU84; -.
DR GeneID; 84623475; -.
DR KEGG; mcys:MCB1EB_0848; -.
DR Proteomes; UP000282597; Chromosome.
DR Proteomes; UP001156688; 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:UP000282597};
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 1..65
FT /note="LexA repressor DNA-binding"
FT /evidence="ECO:0000259|Pfam:PF01726"
FT DOMAIN 93..209
FT /note="Peptidase S24/S26A/S26B/S26C"
FT /evidence="ECO:0000259|Pfam:PF00717"
FT DNA_BIND 28..48
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 217 AA; 23846 MW; 63068A2A63823295 CRC64;
MPKLTVRQQQ VFNLIRHAIK QSGFPPTRAE IAAQLGFSSA NAAEEHLRAL ARKGVIELTA
GASRGIKLKT AATQARSRQP TLPDASFMQL SLPLIGRVAA GSPILATEHI IQHYQCDPSL
FASRPDYLLH VRGLSMRDAG ILDGDLLAVR RQPEAQDGQL IIARLDHEVT VKRFKRHGKK
VELIAENPDY PNLVIEPEQV DFALEGIVVG LIRPSAF
//
