B2IKM0 (LEXA_BEII9) 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:	Bind_1419

Organism

Beijerinckia indica subsp. indica (strain ATCC 9039 / DSM 1715 / NCIB 8712) [Complete proteome] [HAMAP]

Taxonomic identifier

395963 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Alphaproteobacteria › Rhizobiales › Beijerinckiaceae › Beijerinckia

Protein attributes

Sequence length	237 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 – 237	237	LexA repressor HAMAP MF_00015		PRO_1000089546
Regions
	DNA binding	26 – 46	21	H-T-H motif By similarity
Sites
	Active site	158	1	For autocatalytic cleavage activity By similarity
	Active site	196	1	For autocatalytic cleavage activity By similarity
	Site	123 – 124	2	Cleavage; by autolysis By similarity

Sequences

	Sequence		Length	Mass (Da)
	B2IKM0 [UniParc]. Last modified June 10, 2008. Version 1. Checksum: 9C1BB908B79BEB4E	FASTA	237	26,392
	10 20 30 40 50 60 MLTKKQSELL RFIHERLKET GVPPSFDEMK EALDLRSKSG IHRLVMALEE RGFIRRLPNR 70 80 90 100 110 120 ARALEVVRLP DAATPPVPPH GRKFSPSVIE GDLGRVRPHT PHTDDEDSEL TTVAIPVMGR 130 140 150 160 170 180 IAAGTPISAL QHRSHTIGLP MDMLPAGEHY ALEVRGDSMI DAGILDADTV IIRRQDNAEN 190 200 210 220 230 GDIVVALIDD EEATLKRLRR RGASIALEPA NSAYETRIFG PDRVRIQGKL VSLIRRY

References

[1]

"Complete sequence of chromosome of Beijerinckia indica subsp. indica ATCC 9039." Copeland A., Lucas S., Lapidus A., Glavina del Rio T., Dalin E., Tice H., Bruce D., Goodwin L., Pitluck S., LaButti K., Schmutz J., Larimer F., Land M., Hauser L., Kyrpides N., Mikhailova N., Dunfield P.F., Dedysh S.N. , Liesack W., Saw J.H., Alam M., Chen Y., Murrell J.C., Richardson P. Submitted (MAR-2008) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: ATCC 9039 / DSM 1715 / NCIB 8712.

Cross-references

Sequence databases
EMBL GenBank DDBJ	CP001016 Genomic DNA. Translation: ACB95059.1.
RefSeq	YP_001832548.1. NC_010581.1.
3D structure databases
ModBase	Search...
Protein-protein interaction databases
STRING	B2IKM0.
Protein family/group databases
MEROPS	S24.001.
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
GeneID	6200426.
GenomeReviews	Gene locus Bind_1419 in contig CP001016_GR.
KEGG	bid:Bind_1419.
PATRIC	21085655. VBIBeiInd21058_1768.
Organism-specific databases
CMR	Search...
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_BEII9

Accession

Primary (citable) accession number: B2IKM0

Entry history

Integrated into UniProtKB/Swiss-Prot:	March 24, 2009
Last sequence update:	June 10, 2008
Last modified:	January 25, 2012
This is version 29 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program