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 1.5 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: https://doi.org/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. 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
MEF2 CHIMERAA [auth C],
B [auth D],
E [auth A],
F [auth B]
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
GTEx:  ENSG00000213999 
Find proteins for Q02078 (Homo sapiens)
Explore Q02078 
Go to UniProtKB:  Q02078
PHAROS:  Q02078
GTEx:  ENSG00000068305 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsQ02080Q02078
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains LengthOrganismImage
DNA (5'-D(P*AP*AP*CP*TP*AP*TP*TP*TP*AP*TP*AP*AP*GP*A)-3')C [auth G],
G [auth E]
14Homo sapiens
Sequence Annotations
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  • Reference Sequence

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Entity ID: 3
MoleculeChains LengthOrganismImage
DNA (5'-D(P*TP*TP*CP*TP*TP*AP*TP*AP*AP*AP*TP*AP*GP*TP*T)-3')D [auth H],
H [auth F]
15Homo sapiens
Sequence Annotations
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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

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Entry History & Funding Information

Deposition Data


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
  • Version 1.5: 2024-03-13
    Changes: Data collection, Database references, Refinement description