Skip Header

You are using a version of browser that may not display all the features of this website. Please consider upgrading your browser.
Protein

LexA repressor

Gene

lexA

Organism
Mycobacterium leprae (strain TN)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

Functioni

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.UniRule annotation

Catalytic activityi

Hydrolysis of Ala-|-Gly bond in repressor LexA.UniRule annotation

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Active sitei159For autocatalytic cleavage activityUniRule annotation1
Active sitei196For autocatalytic cleavage activityUniRule annotation1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
DNA bindingi47 – 67H-T-H motifUniRule annotationAdd BLAST21

GO - Molecular functioni

  • sequence-specific DNA binding Source: CollecTF
  • serine-type endopeptidase activity Source: InterPro

GO - Biological processi

Keywordsi

Molecular functionDNA-binding, Hydrolase, Repressor
Biological processDNA damage, DNA repair, DNA replication, SOS response, Transcription, Transcription regulation

Names & Taxonomyi

Protein namesi
Recommended name:
LexA repressorUniRule annotation (EC:3.4.21.88UniRule annotation)
Gene namesi
Name:lexAUniRule annotation
Ordered Locus Names:ML1003
ORF Names:B2235_F2_55
OrganismiMycobacterium leprae (strain TN)
Taxonomic identifieri272631 [NCBI]
Taxonomic lineageiBacteriaActinobacteriaCorynebacterialesMycobacteriaceaeMycobacterium
Proteomesi
  • UP000000806 Componenti: Chromosome

Organism-specific databases

LepromaiML1003.

Subcellular locationi

GO - Cellular componenti

  • protein-DNA complex Source: CollecTF

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001700571 – 235LexA repressorAdd BLAST235

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sitei124 – 125Cleavage; by autolysisUniRule annotation2

Keywords - PTMi

Autocatalytic cleavage

Expressioni

Gene expression databases

CollecTFiEXPREG_00000e00.

Interactioni

Subunit structurei

Homodimer.UniRule annotation

Protein-protein interaction databases

STRINGi272631.ML1003.

Structurei

3D structure databases

ProteinModelPortaliQ49848.
SMRiQ49848.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the peptidase S24 family.UniRule annotation

Phylogenomic databases

eggNOGiENOG4105DS7. Bacteria.
COG1974. LUCA.
HOGENOMiHOG000232168.
KOiK01356.
OMAiRQMMQAM.
OrthoDBiPOG091H029U.

Family and domain databases

Gene3Di1.10.10.10. 1 hit.
HAMAPiMF_00015. LexA. 1 hit.
InterProiView protein in InterPro
IPR006200. LexA.
IPR006199. LexA_DNA-bd_dom.
IPR006197. Peptidase_S24_LexA.
IPR015927. Peptidase_S24_S26A/B/C.
IPR011991. WHTH_DNA-bd_dom.
PfamiView protein in Pfam
PF01726. LexA_DNA_bind. 1 hit.
PF00717. Peptidase_S24. 1 hit.
PRINTSiPR00726. LEXASERPTASE.
SUPFAMiSSF46785. SSF46785. 1 hit.
SSF51306. SSF51306. 1 hit.
TIGRFAMsiTIGR00498. lexA. 1 hit.

Sequencei

Sequence statusi: Complete.

Q49848-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MSDSTDISGI TVDGRLHSMD SGLTERQRTI LNVIRASVTS RGYPPSIREI
60 70 80 90 100
ADAVGLTSTS SVAHQLRTLE RKGYLRRDPN RPRAVNVRGV EETQAAGPAV
110 120 130 140 150
LTEVAGSDVL PEPTFVPILG RIAAGSPIFA EGTVEDIFPL PRELVGEGTL
160 170 180 190 200
FLLKVTGDSM VEAAICDGDW VVVRQQKVAD NGDIVAAMID GEATVKTFKR
210 220 230
AGGQVWLIPH NPAFDPIPGN DATVLGKVVT VIRKI
Length:235
Mass (Da):25,089
Last modified:April 5, 2011 - v3
Checksum:i3BED6AB7B0FCE11A
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
U00019 Genomic DNA. Translation: AAA17282.1.
AL583920 Genomic DNA. Translation: CAC31384.1.
PIRiS72946.
RefSeqiNP_301742.1. NC_002677.1.
WP_010908066.1. NC_002677.1.

Genome annotation databases

EnsemblBacteriaiCAC31384; CAC31384; CAC31384.
GeneIDi910052.
KEGGimle:ML1003.
PATRICifig|272631.5.peg.1823.

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.

Entry informationi

Entry nameiLEXA_MYCLE
AccessioniPrimary (citable) accession number: Q49848
Entry historyiIntegrated into UniProtKB/Swiss-Prot: April 27, 2001
Last sequence update: April 5, 2011
Last modified: June 7, 2017
This is version 118 of the entry and version 3 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. Peptidase families
    Classification of peptidase families and list of entries
  2. SIMILARITY comments
    Index of protein domains and families