Crystal structure of transcription regulator CcpA of Lactococcus lactis

Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.177 

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This is version 1.4 of the entry. See complete history


Structure of the transcription regulator CcpA from Lactococcus lactis

Loll, B.Kowalczyk, M.Alings, C.Chieduch, A.Bardowski, J.Saenger, W.Biesiadka, J.

(2007) Acta Crystallogr D Biol Crystallogr 63: 431-436

  • DOI: https://doi.org/10.1107/S0907444907000546
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Catabolite control protein A (CcpA) functions as master transcriptional regulator of carbon catabolism in Firmicutes. It belongs to the family of bacterial repressor/regulator proteins. Here, the crystal structure of the 76 kDa homodimeric CcpA protein from Lactococcus lactis subsp. lactis IL1403 is presented at 1.9 A resolution in the absence of cognate DNA. The phases were derived by molecular replacement and the structure was refined to crystallographic R and R(free) factors of 0.177 and 0.211, respectively. The presence of a sulfate molecule in the direct vicinity of a putative effector-binding site in the monomer allowed the derivation of a model for the possible binding of small organic effector molecules.

  • Organizational Affiliation

    Institute for Chemistry and Biochemistry/Crystallography, Freie Universität Berlin, Takustrasse 6, D-14195 Berlin, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Catabolite control protein A332Lactococcus lactisMutation(s): 1 
Gene Names: ccpa
Find proteins for Q9CF33 (Lactococcus lactis subsp. lactis (strain IL1403))
Explore Q9CF33 
Go to UniProtKB:  Q9CF33
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9CF33
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

Unit Cell:
Length ( Å )Angle ( ˚ )
a = 117.756α = 90
b = 74.267β = 102.36
c = 160.302γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-03-27
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2021-10-20
    Changes: Database references, Derived calculations
  • Version 1.4: 2023-08-30
    Changes: Data collection, Refinement description