1L1C

Structure of the LicT Bacterial Antiterminator Protein in Complex with its RNA Target


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution structure of the LicT-RNA antitermination complex: CAT clamping RAT.

Yang, Y.Declerck, N.Manival, X.Aymerich, S.Kochoyan, M.

(2002) EMBO J. 21: 1987-1997

  • DOI: 10.1093/emboj/21.8.1987

  • PubMed Abstract: 
  • LicT is a bacterial regulatory protein able to prevent the premature arrest of transcription. When activated, LicT binds to a 29 base RNA hairpin overlapping a terminator located in the 5' mRNA leader region of the target genes. We have determined th ...

    LicT is a bacterial regulatory protein able to prevent the premature arrest of transcription. When activated, LicT binds to a 29 base RNA hairpin overlapping a terminator located in the 5' mRNA leader region of the target genes. We have determined the solution structure of the LicT RNA-binding domain (CAT) in complex with its ribonucleic antiterminator (RAT) target by NMR spectroscopy (PDB 1L1C). CAT is a beta-stranded homodimer that undergoes no important conformational changes upon complex formation. It interacts, through mostly hydrophobic and stacking interactions, with the distorted minor groove of the hairpin stem that is interrupted by two asymmetric internal loops. Although different in sequence, these loops share sufficient structural analogy to be recognized similarly by symmetry-related elements of the protein dimer, leading to a quasi- symmetric structure reminiscent of that observed with dimeric transcription regulators bound to palindromic DNA. Sequence analysis suggests that this RNA- binding mode, where the RAT strands are clamped by the CAT dimer, is conserved in homologous systems.


    Organizational Affiliation

    Centre de Biochimie Structurale, CNRS-UMR 9955, INSERM-U554, Université de Montpellier I, 29 rue de Navacelles, F-34090 Montpellier, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Transcription antiterminator licT
A, B
55Bacillus subtilis (strain 168)Gene Names: licT
Find proteins for P39805 (Bacillus subtilis (strain 168))
Go to UniProtKB:  P39805
Entity ID: 1
MoleculeChainsLengthOrganism
licT mRNA antiterminator hairpinC29N/A
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-03-27
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance