6BZ1

MEF2 Chimera D83V mutant/DNA complex

Experimental Data Snapshot

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

wwPDB Validation 3D Report Full Report


This is version 1.3 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:  

  • 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 l ...

    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.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MEF2 CHIMERA
C, D, A, B
95Homo sapiensMutation(s): 1 
Gene Names: MEF2A (MEF2), MEF2B (XMEF2)
Find proteins for Q02078 (Homo sapiens)
Go to Gene View: MEF2A
Go to UniProtKB:  Q02078
Find proteins for Q02080 (Homo sapiens)
Go to Gene View: MEF2B
Go to UniProtKB:  Q02080
Entity ID: 2
MoleculeChainsLengthOrganism
DNA (5'-D(P*AP*AP*CP*TP*AP*TP*TP*TP*AP*TP*AP*AP*GP*A)-3')G,E14Homo sapiens
Entity ID: 3
MoleculeChainsLengthOrganism
DNA (5'-D(P*TP*TP*CP*TP*TP*AP*TP*AP*AP*AP*TP*AP*GP*TP*T)-3')H,F15Homo sapiens
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.97 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.139 
  • Space Group: P 32
Unit Cell:
Length (Å)Angle (°)
a = 78.440α = 90.00
b = 78.440β = 90.00
c = 111.041γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

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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 InstituteUnited States--

Revision History 

  • Version 1.0: 2018-02-07
    Type: Initial release
  • Version 1.1: 2018-02-14
    Type: Derived calculations
  • Version 1.2: 2018-03-07
    Type: Database references
  • Version 1.3: 2018-04-11
    Type: Data collection, Database references