6BZ1

MEF2 Chimera D83V mutant/DNA complex

  • Classification: TRANSCRIPTION/DNA
  • Organism(s): Homo sapiens
  • Expression System: Escherichia coli
  • Mutation(s): Yes 

  • Deposited: 2017-12-21 Released: 2018-02-07 
  • Deposition Author(s): Lei, X., Chen, L.
  • Funding Organization(s): National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.97 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.139 
  • R-Value Observed: 0.141 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

The Cancer Mutation D83V Induces an alpha-Helix to beta-Strand Conformation Switch in MEF2B.

Lei, X.Kou, Y.Fu, Y.Rajashekar, N.Shi, H.Wu, F.Xu, J.Luo, Y.Chen, L.

(2018) J Mol Biol 430: 1157-1172

  • DOI: 10.1016/j.jmb.2018.02.012
  • Primary Citation of Related Structures:  
    6BYY, 6BZ1

  • PubMed Abstract: 
  • MEF2B is a major target of somatic mutations in non-Hodgkin lymphoma. Most of these mutations are non-synonymous substitutions of surface residues in the MADS-box/MEF2 domain. Among them, D83V is the most frequent mutation found in tumor cells. The link between this hotspot mutation and cancer is not well understood ...

    MEF2B is a major target of somatic mutations in non-Hodgkin lymphoma. Most of these mutations are non-synonymous substitutions of surface residues in the MADS-box/MEF2 domain. Among them, D83V is the most frequent mutation found in tumor cells. The link between this hotspot mutation and cancer is not well understood. Here we show that the D83V mutation induces a dramatic α-helix to β-strand switch in the MEF2 domain. Located in an α-helix region rich in β-branched residues, the D83V mutation not only removes the extensive helix stabilization interactions but also introduces an additional β-branched residue that further shifts the conformation equilibrium from α-helix to β-strand. Cross-database analyses of cancer mutations and chameleon sequences revealed a number of well-known cancer targets harboring β-strand favoring mutations in chameleon α-helices, suggesting a commonality of such conformational switch in certain cancers and a new factor to consider when stratifying the rapidly expanding cancer mutation data.


    Organizational Affiliation

    Molecular and Computational Biology, Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089, USA; Department of Chemistry, University of Southern California, Los Angeles, CA 90089, USA; USC Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA. Electronic address: linchen@usc.edu.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
MEF2 CHIMERAE [auth A], F [auth B], A [auth C], B [auth D]95Homo sapiensMutation(s): 1 
Gene Names: MEF2AMEF2MEF2BXMEF2
UniProt & NIH Common Fund Data Resources
Find proteins for Q02080 (Homo sapiens)
Explore Q02080 
Go to UniProtKB:  Q02080
PHAROS:  Q02080
Find proteins for Q02078 (Homo sapiens)
Explore Q02078 
Go to UniProtKB:  Q02078
PHAROS:  Q02078
Protein Feature View
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  • Reference Sequence
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  • Entity ID: 2
    MoleculeChainsLengthOrganismImage
    DNA (5'-D(P*AP*AP*CP*TP*AP*TP*TP*TP*AP*TP*AP*AP*GP*A)-3')G [auth E], C [auth G]14Homo sapiens
    Protein Feature View
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    • Reference Sequence
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    • Entity ID: 3
      MoleculeChainsLengthOrganismImage
      DNA (5'-D(P*TP*TP*CP*TP*TP*AP*TP*AP*AP*AP*TP*AP*GP*TP*T)-3')H [auth F], D [auth H]15Homo sapiens
      Protein Feature View
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      • Reference Sequence
      Experimental Data & Validation

      Experimental Data

      • Method: X-RAY DIFFRACTION
      • Resolution: 2.97 Å
      • R-Value Free: 0.190 
      • R-Value Work: 0.139 
      • R-Value Observed: 0.141 
      • Space Group: P 32
      Unit Cell:
      Length ( Å )Angle ( ˚ )
      a = 78.44α = 90
      b = 78.44β = 90
      c = 111.041γ = 120
      Software Package:
      Software NamePurpose
      REFMACrefinement

      Structure Validation

      View Full Validation Report




      Entry History & Funding Information

      Deposition Data

      • Deposited Date: 2017-12-21 
      • Released Date: 2018-02-07 
      • Deposition Author(s): Lei, X., Chen, L.

      Funding OrganizationLocationGrant Number
      National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)United States--

      Revision History  (Full details and data files)

      • Version 1.0: 2018-02-07
        Type: Initial release
      • Version 1.1: 2018-02-14
        Changes: Derived calculations
      • Version 1.2: 2018-03-07
        Changes: Database references
      • Version 1.3: 2018-04-11
        Changes: Data collection, Database references
      • Version 1.4: 2019-12-18
        Changes: Author supporting evidence