6AU4

Crystal structure of the major quadruplex formed in the human c-MYC promoter

  • Classification: DNA
  • Organism(s): Homo sapiens

  • Deposited: 2017-08-30 Released: 2018-09-12 
  • Deposition Author(s): Stump, S., Mou, T.C., Sprang, S.R., Natale, N.R., Beall, H.D.
  • Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences; ALSAM Foundation; National Institutes of Health/National Institute of Environmental Health Sciences 

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.220 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the major quadruplex formed in the promoter region of the human c-MYC oncogene.

Stump, S.Mou, T.C.Sprang, S.R.Natale, N.R.Beall, H.D.

(2018) PLoS ONE 13: e0205584-e0205584

  • DOI: 10.1371/journal.pone.0205584

  • PubMed Abstract: 
  • The c-MYC oncogene mediates multiple tumor cell survival pathways and is dysregulated or overexpressed in the majority of human cancers. The NHE III1 region of the c-MYC promoter forms a DNA quadruplex. Stabilization of this structure with small mole ...

    The c-MYC oncogene mediates multiple tumor cell survival pathways and is dysregulated or overexpressed in the majority of human cancers. The NHE III1 region of the c-MYC promoter forms a DNA quadruplex. Stabilization of this structure with small molecules has been shown to reduce expression of c-MYC, and targeting the c-MYC quadruplex has become an emerging strategy for development of antitumor compounds. Previous solution NMR studies of the c-MYC quadruplex have assigned the major conformer and topology of this important target, however, regions outside the G-quartet core were not as well-defined. Here, we report a high-resolution crystal structure (2.35 Å) of the major quadruplex formed in the NHE III1 region of the c-MYC promoter. The crystal structure is in general agreement with the solution NMR structure, however, key differences are observed in the position of nucleotides outside the G-quartet core. The crystal structure provides an alternative model that, along with comparisons to other reported quadruplex crystal structures, will be important to the rational design of selective compounds. This work will aid in development of ligands to target the c-MYC promoter quadruplex with the goal of creating novel anticancer therapies.


    Organizational Affiliation

    Center for Biomolecular Structure and Dynamics, Division of Biological Sciences, University of Montana, Missoula, Montana, United States of America.,Center for Environmental Health Sciences, Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, Montana, United States of America.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsLengthOrganism
DNA (5'-D(*TP*GP*AP*GP*GP*GP*TP*GP*GP*GP*TP*AP*GP*GP*GP*TP*GP*GP*GP*TP*AP*A)-3')A,B22Homo sapiens
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download SDF File 
Download CCD File 
A, B
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.220 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 65.663α = 90.00
b = 69.811β = 90.00
c = 32.952γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata scaling
XDSdata reduction
PHASERphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesP20GM103546
National Institutes of Health/National Institute of General Medical SciencesUnited States1P30GM103338
ALSAM Foundation1000233768
National Institutes of Health/National Institute of Environmental Health SciencesUnited StatesP20ES017670

Revision History 

  • Version 1.0: 2018-09-12
    Type: Initial release
  • Version 1.1: 2018-10-24
    Type: Data collection, Database references
  • Version 1.2: 2019-02-20
    Type: Author supporting evidence, Data collection