2LK7

Monomer-dimer equilibrium for 5'-5' stacking of propeller-type parallel-stranded G-quadruplexes: NMR structural study

  • Classification: DNA
  • Mutation(s): No 

  • Deposited: 2011-10-07 Released: 2012-10-10 
  • Deposition Author(s): Do, N.Q., Phan, A.T.

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

Monomer-Dimer Equilibrium for the 5'-5' Stacking of Propeller-Type Parallel-Stranded G-Quadruplexes: NMR Structural Study

Do, N.Q., Phan, A.T.

(2012) Chemistry 

  • DOI: https://doi.org/10.1002/chem.201103295
  • Primary Citation of Related Structures:  
    2LK7

  • PubMed Abstract: 

    Guanine-rich sequence motifs, which contain tracts of three consecutive guanines connected by single non-guanine nucleotides, are abundant in the human genome and can form a robust G-quadruplex structure with high stability. Herein, by using NMR spectroscopy, we investigate the equilibrium between monomeric and 5'-5' stacked dimeric propeller-type G-quadruplexes that are formed by DNA sequences containing GGGT motifs. We show that the monomer-dimer equilibrium depends on a number of parameters, including the DNA concentration, DNA flanking sequences, the concentration and type of cations, and the temperature. We report on the high-definition structure of a simple monomeric G-quadruplex containing three single-residue loops, which could serve as a reference for propeller-type G-quadruplex structures in solution.

    • Organizational Affiliation: 

    School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore.


Macromolecules

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Entity ID: 1
MoleculeChains LengthOrganismImage
DNA (5'-D(*TP*TP*GP*GP*GP*TP*GP*GP*GP*TP*GP*GP*GP*TP*GP*GP*GP*T)-3')18N/A
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-10-10
    Type: Initial release
  • Version 1.1: 2023-06-14
    Changes: Data collection, Database references, Other