2KM3

Structure of an intramolecular G-quadruplex containing a G.C.G.C tetrad formed by human telomeric variant CTAGGG repeats

• PDB DOI: https://doi.org/10.2210/pdb2KM3/pdb
• NAKB: 2KM3

• Classification: DNA
• Mutation(s): No 


• Deposited: 2009-07-17 Released: 2009-11-03 
• Deposition Author(s): Lim, K.W., Alberti, P., Guedin, A., Lacroix, L., Riou, J.F., Royle, N.J., Mergny, J.L., Phan, A.T.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 10 
• Selection Criteria: back calculated data agree with experimental NOESY spectrum 

Literature

Sequence variant (CTAGGG)n in the human telomere favors a G-quadruplex structure containing a G.C.G.C tetrad

Lim, K.W., Alberti, P., Guedin, A., Lacroix, L., Riou, J.F., Royle, N.J., Mergny, J.L., Phan, A.T.

(2009) Nucleic Acids Res 37: 6239-6248

• PubMed: 19692585 
• DOI: https://doi.org/10.1093/nar/gkp630
• Primary Citation of Related Structures:  
  2KM3


• PubMed Abstract: 
  

  Short contiguous arrays of variant CTAGGG repeats in the human telomere are unstable in the male germline and somatic cells, suggesting formation of unusual structures by this repeat type. Here, we report on the structure of an intramolecular G-quadruplex formed by DNA sequences containing four human telomeric variant CTAGGG repeats in potassium solution. Our results reveal a new robust antiparallel G-quadruplex fold involving two G-tetrads sandwiched between a G.C base pair and a G.C.G.C tetrad, which could represent a new platform for drug design targeted to human telomeric DNA.

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Organizational Affiliation: 

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

Biological Assembly 1  

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 6.94 kDa 
• Atom Count: 462 
• Modelled Residue Count: 22 
• Deposited Residue Count: 22 
• Unique nucleic acid chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Length	Organism	Image
DNA (5'-D(*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*GP*CP*TP*AP*GP*GP*G)-3')	A	22	N/A

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 10 
• Selection Criteria: back calculated data agree with experimental NOESY spectrum 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2009-11-03 
Deposition Author(s): Lim, K.W., Alberti, P., Guedin, A., Lacroix, L., Riou, J.F., Royle, N.J., Mergny, J.L., Phan, A.T.

Revision History  

• Version 1.0: 2009-11-03
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance