Reviewed, UniProtKB/Swiss-Prot Q7WCK0 (LEXA_BORBR)

Names and origin

Protein names

Recommended name:
    LexA repressor
    EC=3.4.21.88

Gene names

Name:	lexA
Ordered Locus Names:	BB2271

Organism

Bordetella bronchiseptica (Alcaligenes bronchisepticus) [Complete proteome] [HAMAP]

Taxonomic identifier

518 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Betaproteobacteria › Burkholderiales › Alcaligenaceae › Bordetella

Protein attributes

Sequence length	216 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
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.
Catalytic activity	Hydrolysis of Ala-|-Gly bond in repressor lexA. HAMAP MF_00015
Subunit structure	Homodimer By similarity.
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: HAMAP DNA replication Inferred from electronic annotation. Source: HAMAP SOS response Inferred from electronic annotation. Source: HAMAP negative regulation of transcription, DNA-dependent Inferred from electronic annotation. Source: HAMAP proteolysis Inferred from electronic annotation. Source: InterPro transcription Inferred from electronic annotation. Source: UniProtKB-KW
Molecular function	DNA binding Inferred from electronic annotation. Source: HAMAP serine-type endopeptidase activity Inferred from electronic annotation. Source: HAMAP
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 216	216	LexA repressor HAMAP MF_00015		PRO_0000170014
Regions
	DNA binding	29 – 49	21	H-T-H motif By similarity
Sites
	Active site	134	1	For autocatalytic cleavage activity By similarity
	Active site	171	1	For autocatalytic cleavage activity By similarity
	Site	99 – 100	2	Cleavage; by autolysis By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q7WCK0-1 [UniParc]. Last modified March 1, 2004. Version 2. Checksum: 9E3DB151FA064A72	FASTA	216	23,217
	10 20 30 40 50 60 MATKLTERQQ EILDLIRQTV ARTGFPPTRA EIAQALGFRS PNAAEDHLKA LARKGAIELT 70 80 90 100 110 120 AGASRGIRLK VPDSATPSAQ LTHPLLAQLV LPLVGRVAAG SPILASEHVE REVGVDPGLF 130 140 150 160 170 180 AQTPDYLLKV RGMSMRDAGI LEGDLLAVKR AAEARNGQIV VARLGDEVTV KRLQRQNGRI 190 200 210 ELLPENPDFA PIVVANTDEF ALEGIAVGLI RTQPLH

References

[1]

"Comparative analysis of the genome sequences of Bordetella pertussis, Bordetella parapertussis and Bordetella bronchiseptica." Parkhill J., Sebaihia M., Preston A., Murphy L.D., Thomson N.R., Harris D.E., Holden M.T.G., Churcher C.M., Bentley S.D., Mungall K.L., Cerdeno-Tarraga A.-M., Temple L., James K.D., Harris B., Quail M.A., Achtman M., Atkin R., Baker S. , Basham D., Bason N., Cherevach I., Chillingworth T., Collins M., Cronin A., Davis P., Doggett J., Feltwell T., Goble A., Hamlin N., Hauser H., Holroyd S., Jagels K., Leather S., Moule S., Norberczak H., O'Neil S., Ormond D., Price C., Rabbinowitsch E., Rutter S., Sanders M., Saunders D., Seeger K., Sharp S., Simmonds M., Skelton J., Squares R., Squares S., Stevens K., Unwin L., Whitehead S., Barrell B.G., Maskell D.J. Nat. Genet. 35:32-40(2003) [PubMed: 12910271] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: RB50 / ATCC BAA-588 / NCTC 13252.

Cross-references

Sequence databases
EMBLGenBankDDBJ	BX640443 Genomic DNA. Translation: CAE32767.1. Different initiation.
3D structure databases
ModBase	Search...
Protein family/group databases
MEROPS	S24.001.
Genome annotation databases
GenomeReviews	Gene locus BB2271 in contig BX470250_GR.
KEGG	bbr:BB2271.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	Q7WCK0.
Enzyme and pathway databases
BioCyc	BBRO257310:BB2271-MON.
BRENDA	3.4.21.88. 413.
Family and domain databases
HAMAP	MF_00015. [Tree]
InterPro	IPR006199. LexA_DNA_bd. IPR006200. Pept_S24_LexA. IPR006197. Peptidase_S24_LexA_cons-reg. IPR019759. Peptidase_S24_S26_cons-reg. IPR011056. Peptidase_S24_S26A/B/C_b-rbn. IPR011991. Wing_hlx_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.
Pfam	PF01726. LexA_DNA_bind. 1 hit. PF00717. Peptidase_S24. 1 hit. [Graphical view]
PRINTS	PR00726. LEXASERPTASE.
TIGRFAMs	TIGR00498. lexA. 1 hit.
ProtoNet	Search...

Entry information

Entry name

LEXA_BORBR

Accession

Primary (citable) accession number: Q7WCK0

Entry history

Integrated into UniProtKB/Swiss-Prot:	March 1, 2004
Last sequence update:	March 1, 2004
Last modified:	June 16, 2009
This is version 38 of the entry and version 2 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HAMAP (High-quality Automated and Manual Annotation of microbial Proteomes)