2A5P

Monomeric parallel-stranded DNA tetraplex with snap-back 3+1 3' G-tetrad, single-residue chain reversal loops, GAG triad in the context of GAAG diagonal loop, NMR, 8 struct.


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 
  • Selection Criteria: back calculated data agree with experimental NOESY spectrum 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Small-molecule interaction with a five-guanine-tract G-quadruplex structure from the human MYC promoter.

Phan, A.T.Kuryavyi, V.Gaw, H.Y.Patel, D.J.

(2005) Nat Chem Biol 1: 167-173

  • DOI: 10.1038/nchembio723
  • Primary Citation of Related Structures:  
    2A5P, 2A5R

  • PubMed Abstract: 
  • It has been widely accepted that DNA can adopt other biologically relevant structures beside the Watson-Crick double helix. One recent important example is the guanine-quadruplex (G-quadruplex) structure formed by guanine tracts found in the MYC (or c-myc) promoter region, which regulates the transcription of the MYC oncogene ...

    It has been widely accepted that DNA can adopt other biologically relevant structures beside the Watson-Crick double helix. One recent important example is the guanine-quadruplex (G-quadruplex) structure formed by guanine tracts found in the MYC (or c-myc) promoter region, which regulates the transcription of the MYC oncogene. Stabilization of this G-quadruplex by ligands, such as the cationic porphyrin TMPyP4, decreases the transcriptional level of MYC. Here, we report the first structure of a DNA fragment containing five guanine tracts from this region. An unusual G-quadruplex fold, which was derived from NMR restraints using unambiguous model-independent resonance assignment approaches, involves a core of three stacked guanine tetrads formed by four parallel guanine tracts with all anti guanines and a snapback 3'-end syn guanine. We have determined the structure of the complex formed between this G-quadruplex and TMPyP4. This structural information, combined with details of small-molecule interaction, provides a platform for the design of anticancer drugs targeting multi-guanine-tract sequences that are found in the MYC and other oncogenic promoters, as well as in telomeres.


    Organizational Affiliation

    Structural Biology Program, Memorial Sloan-Kettering Cancer Center, New York, New York 10021, USA. phantuan@mskcc.org



Macromolecules
Find similar nucleic acids by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsLengthOrganismImage
5'-D(*TP*GP*AP*GP*GP*GP*TP*GP*GP*IP*GP*AP*GP*GP*GP*TP*GP*GP*GP*GP*AP*AP*GP*G)-3'A 24Homo sapiens
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 
  • Selection Criteria: back calculated data agree with experimental NOESY spectrum 
  • OLDERADO: 2A5P Olderado

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-07-26
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-03-09
    Changes: Data collection, Database references, Derived calculations