1JJP

A(GGGG) Pentad-Containing Dimeric DNA Quadruplex Involving Stacked G(anti)G(anti)G(anti)G(syn) Tetrads


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 
  • Conformers Submitted: 
  • Selection Criteria: all calculated structures submitted 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

V-shaped scaffold: a new architectural motif identified in an A x (G x G x G x G) pentad-containing dimeric DNA quadruplex involving stacked G(anti) x G(anti) x G(anti) x G(syn) tetrads.

Zhang, N.Gorin, A.Majumdar, A.Kettani, A.Chernichenko, N.Skripkin, E.Patel, D.J.

(2001) J.Mol.Biol. 311: 1063-1079

  • DOI: 10.1006/jmbi.2001.4916

  • PubMed Abstract: 
  • We report the results of an NMR study of unlabeled and uniformly (13)C,(15)N-labeled d(G(3)AG(2)T(3)G(3)AT) in 100 mM NaCl, conditions under which it forms a dimeric quadruplex containing several new topological features. The DNA oligomer chain in ea ...

    We report the results of an NMR study of unlabeled and uniformly (13)C,(15)N-labeled d(G(3)AG(2)T(3)G(3)AT) in 100 mM NaCl, conditions under which it forms a dimeric quadruplex containing several new topological features. The DNA oligomer chain in each symmetry-related monomer subunit undergoes three sharp turns to form a compact domain, with all the purine bases involved in pairing alignments. The first turn is of the double chain reversal type, the second is of the edgewise type, and the third represents a new alignment, the V-shaped type. Each monomer of the dimeric quadruplex contains two stacked G(anti) x G(anti) x G(anti) x G(syn) tetrads, one of which forms a newly identified A x (G x G x G x G) pentad, through sheared G.A mismatch formation. There is a break in one of the four G-G columns that link adjacent G x G x G x G tetrads within each monomer. This architectural interruption is compensated by a new topological feature of quadruplex architecture, the V-shaped scaffold. The missing G-G column results in an opening that could facilitate insertion of planar ligands into the quadruplex. The dimeric interface contains stacked A.(G.G.G.G) pentads, with each pentad containing four bases from one monomer and a syn G1 from the partner monomer. Several potential ligand-binding pockets, positioned towards either end of the folded architecture, were identifiable in a surface view of the solution structure of the dimeric d(G(3)AG(2)T(3)G(3)AT) quadruplex.


    Organizational Affiliation

    Cellular Biochemistry and Biophysics Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsLengthOrganism
5'-D(*GP*GP*GP*AP*GP*GP*TP*TP*TP*GP*GP*GP*AP*T)-3'A,B14N/A
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 
  • Conformers Submitted: 
  • Selection Criteria: all calculated structures submitted 

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-09-19
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance