CtBP/BARS in ternary complex with NAD(H) and PIDLSKK peptide

Experimental Data Snapshot

  • Resolution: 3.10 Å
  • R-Value Free: 0.315 
  • R-Value Work: 0.256 
  • R-Value Observed: 0.256 

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Ctbp/Bars: A Dual-Function Protein Involved in Transcription Co-Repression and Golgi Membrane Fission

Nardini, M.Spano, S.Cericola, C.Pesce, A.Massaro, A.Millo, E.Luini, A.Corda, D.Bolognesi, M.

(2003) EMBO J 22: 3122

  • DOI: https://doi.org/10.1093/emboj/cdg283
  • Primary Citation of Related Structures:  
    1HKU, 1HL3

  • PubMed Abstract: 

    C-terminal-binding protein/brefeldin A-ADP ribosylated substrate (CtBP/BARS) plays key roles in development and oncogenesis as a transcription co-repressor, and in intracellular traffic as a promoter of Golgi membrane fission. Co-repressor activity is regulated by NAD(H) binding to CtBP/BARS, while membrane fission is associated with its acyl-CoA-dependent acyltransferase activity. Here, we report the crystal structures of rat CtBP/BARS in a binary complex with NAD(H), and in a ternary complex with a PIDLSKK peptide mimicking the consensus motif (PXDLS) recognized in CtBP/BARS cellular partners. The structural data show CtBP/BARS in a NAD(H)-bound dimeric form; the peptide binding maps the recognition site for DNA-binding proteins and histone deacetylases to an N-terminal region of the protein. The crystal structure together with the site-directed mutagenesis data and binding experiments suggest a rationale for the molecular mechanisms underlying the two fundamental co-existing, but diverse, activities supported by CtBP/BARS in the nucleus and in Golgi membranes.

  • Organizational Affiliation

    Department of Physics-INFM, University of Genova, Via Dodecaneso 33, 16146 Genova, Italy.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
C-TERMINAL BINDING PROTEIN 3358Rattus norvegicusMutation(s): 0 
Find proteins for Q9Z2F5 (Rattus norvegicus)
Explore Q9Z2F5 
Go to UniProtKB:  Q9Z2F5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9Z2F5
Sequence Annotations
  • Reference Sequence

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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
PRO-ILE-ASP-LEU-SER-LYS-LYS PEPTIDE7synthetic constructMutation(s): 0 
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on NAD

Download Ideal Coordinates CCD File 
C21 H27 N7 O14 P2
Experimental Data & Validation

Experimental Data

  • Resolution: 3.10 Å
  • R-Value Free: 0.315 
  • R-Value Work: 0.256 
  • R-Value Observed: 0.256 
  • Space Group: P 64 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 84.811α = 90
b = 84.811β = 90
c = 159.719γ = 120
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: 2003-06-19
    Type: Initial release
  • Version 1.1: 2016-12-21
    Changes: Database references, Derived calculations, Non-polymer description, Other, Source and taxonomy, Structure summary, Version format compliance
  • Version 1.2: 2023-12-13
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description