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Protein

LexA repressor

Gene

lexA

Organism
Shewanella pealeana (strain ATCC 700345 / ANG-SQ1)
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 sitei123For autocatalytic cleavage activityUniRule annotation1
Active sitei160For autocatalytic cleavage activityUniRule annotation1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
DNA bindingi28 – 48H-T-H motifUniRule annotationAdd BLAST21

GO - Molecular functioni

GO - Biological processi

Keywordsi

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

Protein family/group databases

MEROPSiS24.001.

Names & Taxonomyi

Protein namesi
Recommended name:
LexA repressorUniRule annotation (EC:3.4.21.88UniRule annotation)
Gene namesi
Name:lexAUniRule annotation
Ordered Locus Names:Spea_3997
OrganismiShewanella pealeana (strain ATCC 700345 / ANG-SQ1)
Taxonomic identifieri398579 [NCBI]
Taxonomic lineageiBacteriaProteobacteriaGammaproteobacteriaAlteromonadalesShewanellaceaeShewanella
Proteomesi
  • UP000002608 Componenti: Chromosome

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_10000740661 – 206LexA repressorAdd BLAST206

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sitei88 – 89Cleavage; by autolysisUniRule annotation2

Keywords - PTMi

Autocatalytic cleavage

Interactioni

Subunit structurei

Homodimer.UniRule annotation

Protein-protein interaction databases

STRINGi398579.Spea_3997.

Structurei

3D structure databases

ProteinModelPortaliA8H9S0.
SMRiA8H9S0.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the peptidase S24 family.UniRule annotation

Phylogenomic databases

eggNOGiENOG4105DS7. Bacteria.
COG1974. LUCA.
HOGENOMiHOG000232167.
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.

A8H9S0-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MRPLTPRQAE ILELIKRNIA DTGMPPTRAE IARRLGFKSA NAAEEHLKAL
60 70 80 90 100
AKKGCIEIMP GTSRGIKLTQ ESTEEPDLGL PLIGQVAAGE PILAQEHVEQ
110 120 130 140 150
HYKVDPAMFR PSADFLLRVR GDSMKNIGIL EGDLLAVHKI EQARNGQIVV
160 170 180 190 200
ARVEDDVTVK RFEKKGNKVF LHAENEDYSP IEVDLANQSL SIEGLAVGVI

RNGDWQ
Length:206
Mass (Da):22,747
Last modified:November 13, 2007 - v1
Checksum:i2FE56D7EA4ECC1C6
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP000851 Genomic DNA. Translation: ABV89307.1.
RefSeqiWP_012157187.1. NC_009901.1.

Genome annotation databases

EnsemblBacteriaiABV89307; ABV89307; Spea_3997.
KEGGispl:Spea_3997.

Similar proteinsi

Entry informationi

Entry nameiLEXA_SHEPA
AccessioniPrimary (citable) accession number: A8H9S0
Entry historyiIntegrated into UniProtKB/Swiss-Prot: May 20, 2008
Last sequence update: November 13, 2007
Last modified: June 7, 2017
This is version 73 of the entry and version 1 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