PRD of LicT antiterminator from Bacillus subtilis

Experimental Data Snapshot

  • Resolution: 1.55 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.224 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history

Re-refinement Note

A newer entry is available that reflects an alternative modeling of the original data: 6TWR


Crystal Structure of an Activated Form of the Pts Regulation Domain from the Lict Transcriptional Antitrminator

Van Tilbeurgh, H.Lecoq, D.Declerck, N.

(2001) EMBO J 20: 3789

  • DOI: https://doi.org/10.1093/emboj/20.14.3789
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The transcriptional antiterminator protein LicT regulates the expression of Bacillus subtilis operons involved in beta-glucoside metabolism. It belongs to a newly characterized family of bacterial regulators whose activity is controlled by the phosphoenolpyruvate:sugar phosphotransferase system (PTS). LicT contains an N-terminal RNA-binding domain (56 residues), and a PTS regulation domain (PRD, 221 residues) that is phosphorylated on conserved histidines in response to substrate availability. Replacement of both His207 and His269 with a negatively charged residue (aspartic acid) led to a highly active LicT variant that no longer responds to either induction or catabolite repression signals from the PTS. In contrast to wild type, the activated mutant form of the LicT regulatory domain crystallized easily and provided the first structure of a PRD, determined at 1.55 A resolution. The structure is a homodimer, each monomer containing two analogous alpha-helical domains. The phosphorylation sites are totally buried at the dimer interface and hence inaccessible to phosphorylating partners. The structure suggests important tertiary and quaternary rearrangements upon LicT activation, which could be communicated from the protein C-terminal end up to the RNA-binding domain.

  • Organizational Affiliation

    Architecture et Fonction des Macromolécules Biologiques, UMR 6098 du CNRS, Université d'Aix-Marseille, I et II, ESIL-GBMA, 163 Avenue de Luminy Case 925, 13288 Marseille Cedex 9, France. vantil@esil.univ-mrs.fr

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
TRANSCRIPTION ANTITERMINATOR LICT224Bacillus subtilisMutation(s): 2 
Gene Names: licT
Find proteins for P39805 (Bacillus subtilis (strain 168))
Explore P39805 
Go to UniProtKB:  P39805
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP39805
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.55 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.224 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.25α = 90
b = 129.71β = 90
c = 50.71γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-08-28
    Type: Initial release
  • Version 1.1: 2011-05-07
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance