A5VQR8 (LEXA_BRUO2) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended name:
LexA repressor
EC=3.4.21.88

Gene names

Name:	lexA
Ordered Locus Names:	BOV_1104

Organism

Brucella ovis (strain ATCC 25840 / 63/290 / NCTC 10512) [Complete proteome] [HAMAP]

Taxonomic identifier

444178 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Alphaproteobacteria › Rhizobiales › Brucellaceae › Brucella

Protein attributes

Sequence length	240 AA.
Sequence status	Complete.
Protein existence	Inferred from homology

General annotation (Comments)

Function	Represses a number of genes involved in the response to DNA damage (SOS response), including recA and lexA. In the presence of single-stranded DNA, RecA interacts with LexA causing an autocatalytic cleavage which disrupts the DNA-binding part of LexA, leading to derepression of the SOS regulon and eventually DNA repair By similarity. HAMAP MF_00015
Catalytic activity	Hydrolysis of Ala-|-Gly bond in repressor lexA. HAMAP MF_00015
Subunit structure	Homodimer By similarity. HAMAP MF_00015
Sequence similarities	Belongs to the peptidase S24 family.

Ontologies

Keywords
Biological process	DNA damage DNA repair DNA replication SOS response Transcription Transcription regulation
Ligand	DNA-binding
Molecular function	Hydrolase Repressor
PTM	Autocatalytic cleavage
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	DNA repair Inferred from electronic annotation. Source: UniProtKB-KW DNA replication Inferred from electronic annotation. Source: UniProtKB-KW SOS response Inferred from electronic annotation. Source: UniProtKB-KW proteolysis Inferred from electronic annotation. Source: InterPro regulation of transcription, DNA-dependent Inferred from electronic annotation. Source: UniProtKB-KW transcription, DNA-dependent Inferred from electronic annotation. Source: UniProtKB-KW
Molecular function	DNA binding Inferred from electronic annotation. Source: UniProtKB-KW serine-type endopeptidase activity Inferred from electronic annotation. Source: InterPro
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 240	240	LexA repressor HAMAP MF_00015		PRO_1000001264
Regions
	DNA binding	26 – 46	21	H-T-H motif By similarity
Sites
	Active site	161	1	For autocatalytic cleavage activity By similarity
	Active site	199	1	For autocatalytic cleavage activity By similarity
	Site	126 – 127	2	Cleavage; by autolysis By similarity

Sequences

	Sequence		Length	Mass (Da)
	A5VQR8 [UniParc]. Last modified July 10, 2007. Version 1. Checksum: 40661DAC60C8C7A2	FASTA	240	26,070
	10 20 30 40 50 60 MLTRKQHELL LFIHERLKET GIPPSFDEMK EALDLASKSG IHRLITALEE RGFIRRLPNR 70 80 90 100 110 120 ARALEVLRLP DSIAPGLSPQ KKFAPSVIEG SLGKVASVQP VRPAPAPQNS EAPATVSVPV 130 140 150 160 170 180 MGRIAAGVPI SAIQNQTHML SLPPEMIGAG EHYALEVKGD SMIDAGIFDG DTVIIKRGDT 190 200 210 220 230 240 ANPGEIVVAL VDEEEATLKR FRREGASIAL EAANPAYETR IFGPDRVHVQ GKLVGLIRRY

References

[1]	Paulsen I. Submitted (MAY-2007) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: ATCC 25840 / 63/290 / NCTC 10512.

Cross-references

Sequence databases
EMBL GenBank DDBJ	CP000708 Genomic DNA. Translation: ABQ60182.1.
RefSeq	YP_001259065.1. NC_009505.1.
3D structure databases
ProteinModelPortal	A5VQR8.
ModBase	Search...
Protein-protein interaction databases
STRING	A5VQR8.
Protein family/group databases
MEROPS	S24.001.
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
GeneID	5201756.
GenomeReviews	Gene locus BOV_1104 in contig CP000708_GR.
KEGG	bov:BOV_1104.
PATRIC	17862128. VBIBruOvi136990_2468.
TIGR	BOV_1104.
Phylogenomic databases
HOGENOM	HBG679610.
OMA	AILTFIR.
ProtClustDB	PRK00215.
Family and domain databases
HAMAP	MF_00015. LexA. [Tree]
InterPro	IPR006199. LexA_DNA-bd_dom. IPR006200. Pept_S24_LexA. IPR006197. Peptidase_S24_LexA. IPR019759. Peptidase_S24_S26. IPR015927. Peptidase_S24_S26A/B/C. IPR011056. Peptidase_S24_S26A/B/C_b-rbn. IPR011991. WHTH_trsnscrt_rep_DNA-bd. [Graphical view]
Gene3D	G3DSA:2.10.109.10. Pept_S24_S26_C. 1 hit. G3DSA:1.10.10.10. Wing_hlx_DNA_bd. 1 hit.
KO	K01356.
Pfam	PF01726. LexA_DNA_bind. 1 hit. PF00717. Peptidase_S24. 1 hit. [Graphical view]
PRINTS	PR00726. LEXASERPTASE.
SUPFAM	SSF51306. Pept_S24_S26_C. 1 hit.
TIGRFAMs	TIGR00498. LexA. 1 hit.
ProtoNet	Search...

Entry information

Entry name

LEXA_BRUO2

Accession

Primary (citable) accession number: A5VQR8

Entry history

Integrated into UniProtKB/Swiss-Prot:	January 15, 2008
Last sequence update:	July 10, 2007
Last modified:	January 25, 2012
This is version 34 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program