1ILF

NMR STRUCTURE OF APO CBFB


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 58 
  • Conformers Submitted: 25 
  • Selection Criteria: structures with the lowest energy 

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This is version 1.2 of the entry. See complete history


Literature

Structure and backbone dynamics of Apo-CBFbeta in solution.

Wolf-Watz, M.Grundstrom, T.Hard, T.

(2001) Biochemistry 40: 11423-11432

  • DOI: 10.1021/bi010713+
  • Primary Citation of Related Structures:  
    1ILF

  • PubMed Abstract: 
  • Runx proteins constitute a family of mammalian transcription factors that interact with DNA through their evolutionarily conserved Runt domain. CBFbeta, alternatively denoted PEBP2beta, is the non-DNA-binding heterodimer partner and acts to enhance the DNA binding affinity of Runx proteins ...

    Runx proteins constitute a family of mammalian transcription factors that interact with DNA through their evolutionarily conserved Runt domain. CBFbeta, alternatively denoted PEBP2beta, is the non-DNA-binding heterodimer partner and acts to enhance the DNA binding affinity of Runx proteins. Runx proteins and CBFbeta are associated with a variety of biological functions and human diseases; they are, for example, together the most frequent targets for chromosomal rearrangements in acute human leukemias. We have determined the solution structure and characterized the backbone dynamics of C-terminally truncated fragments containing residues 1-141 of CBFbeta. The present apo-CBFbeta structure is very similar to that seen in a Runt-CBFbeta complex. An evaluation of backbone (15)N NMR relaxation parameters shows that CBFbeta is a rigid molecule with high order parameters throughout the backbone; the only regions displaying significant dynamics are a long loop and the C-terminal alpha-helix. A few residues display relaxation behavior indicating conformational exchange on microsecond to millisecond time scales, but only one of these is located at the Runt binding surface. Our structure and dynamics analysis of CBFbeta therefore suggests that the protein binds to Runt without large conformational changes or induced folding ("lock-and-key" interaction). The apo-CBFbeta structure presented here exhibits several significant differences with two other published NMR ensembles of very similar protein fragments. The differences are located in four regions outside of the central beta-barrel, whereas the beta-barrel itself is almost identical in the three NMR structures. The comparison illustrates that independently determined NMR structures may display rather large differences in backbone conformation in regions that appear to be well-defined in each of the calculated NMR ensembles.


    Organizational Affiliation

    Department of Biotechnology, Center for Structural Biochemistry, Royal Institute of Technology (KTH), Novum, S-141 57 Huddinge, Sweden.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CORE-BINDING FACTOR A141Mus musculusMutation(s): 0 
Gene Names: CbfbPebp2bPebpb2
Find proteins for Q08024 (Mus musculus)
Explore Q08024 
Go to UniProtKB:  Q08024
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 58 
  • Conformers Submitted: 25 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 1ILF Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-09-26
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance