5I50

Structure of OmoMYC bound to double-stranded DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.701 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.227 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

OmoMYC blunts promoter invasion by oncogenic MYC to inhibit gene expression characteristic of MYC-dependent tumors.

Jung, L.A.Gebhardt, A.Koelmel, W.Ade, C.P.Walz, S.Kuper, J.von Eyss, B.Letschert, S.Redel, C.d'Artista, L.Biankin, A.Zender, L.Sauer, M.Wolf, E.Evan, G.Kisker, C.Eilers, M.

(2017) Oncogene 36: 1911-1924

  • DOI: 10.1038/onc.2016.354
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • MYC genes have both essential roles during normal development and exert oncogenic functions during tumorigenesis. Expression of a dominant-negative allele of MYC, termed OmoMYC, can induce rapid tumor regression in mouse models with little toxicity f ...

    MYC genes have both essential roles during normal development and exert oncogenic functions during tumorigenesis. Expression of a dominant-negative allele of MYC, termed OmoMYC, can induce rapid tumor regression in mouse models with little toxicity for normal tissues. How OmoMYC discriminates between physiological and oncogenic functions of MYC is unclear. We have solved the crystal structure of OmoMYC and show that it forms a stable homodimer and as such recognizes DNA in the same manner as the MYC/MAX heterodimer. OmoMYC attenuates both MYC-dependent activation and repression by competing with MYC/MAX for binding to chromatin, effectively lowering MYC/MAX occupancy at its cognate binding sites. OmoMYC causes the largest decreases in promoter occupancy and changes in expression on genes that are invaded by oncogenic MYC levels. A signature of OmoMYC-regulated genes defines subgroups with high MYC levels in multiple tumor entities and identifies novel targets for the eradication of MYC-driven tumors.


    Organizational Affiliation

    Theodor Boveri Institute, Biocenter, University of Würzburg, Würzburg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Myc proto-oncogene protein
A, B
118Homo sapiensMutation(s): 4 
Gene Names: MYC (BHLHE39)
Find proteins for P01106 (Homo sapiens)
Go to Gene View: MYC
Go to UniProtKB:  P01106
Entity ID: 2
MoleculeChainsLengthOrganism
DNA (5'-D(P*CP*AP*CP*CP*CP*GP*GP*TP*CP*AP*CP*GP*TP*GP*GP*CP*CP*TP*AP*CP*AP*C)-3')C22synthetic construct
Entity ID: 3
MoleculeChainsLengthOrganism
DNA (5'-D(P*GP*TP*GP*TP*AP*GP*GP*CP*CP*AP*CP*GP*TP*GP*AP*CP*CP*GP*GP*GP*TP*G)-3')D22synthetic construct
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.701 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.227 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 36.538α = 90.00
b = 95.545β = 105.90
c = 64.944γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
German Research FoundationGermany2341

Revision History 

  • Version 1.0: 2016-10-26
    Type: Initial release
  • Version 1.1: 2017-04-19
    Type: Database references
  • Version 1.2: 2019-02-20
    Type: Author supporting evidence, Data collection, Derived calculations, Source and taxonomy