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Protein

LexA repressor

Gene

lexA

Organism
Mycobacterium sp. (strain MCS)
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 sitei154For autocatalytic cleavage activityUniRule annotation1
Active sitei191For autocatalytic cleavage activityUniRule annotation1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
DNA bindingi44 – 64H-T-H motifUniRule annotationAdd BLAST21

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Hydrolase, Repressor

Keywords - Biological processi

DNA damage, DNA repair, DNA replication, SOS response, Transcription, Transcription regulation

Keywords - Ligandi

DNA-binding

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:Mmcs_2168
OrganismiMycobacterium sp. (strain MCS)
Taxonomic identifieri164756 [NCBI]
Taxonomic lineageiBacteriaActinobacteriaCorynebacterialesMycobacteriaceaeMycobacterium

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00003227481 – 230LexA repressorAdd BLAST230

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sitei119 – 120Cleavage; by autolysisUniRule annotation2

Keywords - PTMi

Autocatalytic cleavage

Interactioni

Subunit structurei

Homodimer.UniRule annotation

Structurei

3D structure databases

ProteinModelPortaliQ1BA08.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the peptidase S24 family.UniRule annotation

Phylogenomic databases

HOGENOMiHOG000232168.
KOiK01356.
OMAiKQHELLM.

Family and domain databases

Gene3Di1.10.10.10. 1 hit.
2.10.109.10. 1 hit.
HAMAPiMF_00015. LexA. 1 hit.
InterProiIPR006200. LexA.
IPR006199. LexA_DNA-bd_dom.
IPR028360. Peptidase_S24/S26_b-rbn.
IPR006197. Peptidase_S24_LexA.
IPR019759. Peptidase_S24_S26.
IPR015927. Peptidase_S24_S26A/B/C.
IPR011991. WHTH_DNA-bd_dom.
[Graphical view]
PfamiPF01726. LexA_DNA_bind. 1 hit.
PF00717. Peptidase_S24. 1 hit.
[Graphical view]
PRINTSiPR00726. LEXASERPTASE.
SUPFAMiSSF46785. SSF46785. 1 hit.
SSF51306. SSF51306. 1 hit.
TIGRFAMsiTIGR00498. lexA. 1 hit.

Sequencei

Sequence statusi: Complete.

Q1BA08-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MSDDSSETRT GGRRGADAGL TERQRTILEV IRASVTSRGY PPSIREIGDA
60 70 80 90 100
VGLTSTSSVA HQLRTLERKG YLRRDPNRPR AVDVRLSDEP ATPVVTTDVA
110 120 130 140 150
GSDALPEPTF VPVLGRIAAG GPILAEEAVE DVFPLPRELV GEGSLFLLKV
160 170 180 190 200
VGDSMVDAAI CDGDWVVVRQ QAVADNGDIV AAMIDGEATV KTFKRSRGQV
210 220 230
WLMPHNPAFE PIPGNDAAVL GKVVTVIRKI
Length:230
Mass (Da):24,560
Last modified:July 11, 2006 - v1
Checksum:i71F14E070C75B085
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP000384 Genomic DNA. Translation: ABG08276.1.
RefSeqiWP_011559566.1. NC_008146.1.

Genome annotation databases

EnsemblBacteriaiABG08276; ABG08276; Mmcs_2168.
KEGGimmc:Mmcs_2168.
PATRICi18114534. VBIMycSp106721_2220.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP000384 Genomic DNA. Translation: ABG08276.1.
RefSeqiWP_011559566.1. NC_008146.1.

3D structure databases

ProteinModelPortaliQ1BA08.
ModBaseiSearch...
MobiDBiSearch...

Protein family/group databases

MEROPSiS24.001.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiABG08276; ABG08276; Mmcs_2168.
KEGGimmc:Mmcs_2168.
PATRICi18114534. VBIMycSp106721_2220.

Phylogenomic databases

HOGENOMiHOG000232168.
KOiK01356.
OMAiKQHELLM.

Family and domain databases

Gene3Di1.10.10.10. 1 hit.
2.10.109.10. 1 hit.
HAMAPiMF_00015. LexA. 1 hit.
InterProiIPR006200. LexA.
IPR006199. LexA_DNA-bd_dom.
IPR028360. Peptidase_S24/S26_b-rbn.
IPR006197. Peptidase_S24_LexA.
IPR019759. Peptidase_S24_S26.
IPR015927. Peptidase_S24_S26A/B/C.
IPR011991. WHTH_DNA-bd_dom.
[Graphical view]
PfamiPF01726. LexA_DNA_bind. 1 hit.
PF00717. Peptidase_S24. 1 hit.
[Graphical view]
PRINTSiPR00726. LEXASERPTASE.
SUPFAMiSSF46785. SSF46785. 1 hit.
SSF51306. SSF51306. 1 hit.
TIGRFAMsiTIGR00498. lexA. 1 hit.
ProtoNetiSearch...

Entry informationi

Entry nameiLEXA_MYCSS
AccessioniPrimary (citable) accession number: Q1BA08
Entry historyi
Integrated into UniProtKB/Swiss-Prot: March 18, 2008
Last sequence update: July 11, 2006
Last modified: November 2, 2016
This is version 77 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Documents

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

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.