2M1G

Parallel human telomeric quadruplex containing 2'F-ANA substitutions

• PDB DOI: https://doi.org/10.2210/pdb2M1G/pdb
• BMRB: 18862
• NAKB: 2M1G

• Classification: DNA
• Mutation(s): No 


• Deposited: 2012-11-27 Released: 2013-05-08 
• Deposition Author(s): Martin-Pintado, N., Yahyaee-Anzahaee, M., Deleavey, G.F., Portella, G., Orozco, M., Damha, M.J., Gonzalez, C.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 20 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 

Literature

Dramatic effect of furanose c2' substitution on structure and stability: directing the folding of the human telomeric quadruplex with a single fluorine atom.

Martin-Pintado, N., Yahyaee-Anzahaee, M., Deleavey, G.F., Portella, G., Orozco, M., Damha, M.J., Gonzalez, C.

(2013) J Am Chem Soc 135: 5344-5347

• PubMed: 23521511 
• DOI: https://doi.org/10.1021/ja401954t
• Primary Citation of Related Structures:  
  2M1G


• PubMed Abstract: 
  

  Human telomeric DNA quadruplexes can adopt different conformations in solution. We have found that arabinose, 2'F-arabinose, and ribose substitutions stabilize the propeller parallel G-quadruplex form over competing conformers, allowing NMR structural determination of this particularly significant nucleic acid structure. 2'F-arabinose substitution provides the greatest stabilization as a result of electrostatic (F-CH---O4') and pseudo-hydrogen-bond (F---H8) stabilizing interactions. In contrast, 2'F-rG substitution provokes a dramatic destabilization of the quadruplex structure due to unfavorable electrostatic repulsion between the phosphate and the 2'-F.

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Organizational Affiliation: 

Instituto de Química Física Rocasolano, CSIC, Serrano 119, 28006 Madrid, Spain.

Biological Assembly 1  

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 7.58 kDa 
• Atom Count: 504 
• Modelled Residue Count: 24 
• Deposited Residue Count: 24 
• Unique nucleic acid chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Length	Organism	Image
5'-D(*TP*AP*GP*GP*GP*TP*TP*AP*(GFL)P*GP*GP*T)-3'	A, B	12	N/A

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 20 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2013-05-08 
Deposition Author(s): Martin-Pintado, N., Yahyaee-Anzahaee, M., Deleavey, G.F., Portella, G., Orozco, M., Damha, M.J., Gonzalez, C.

Revision History  

• Version 1.0: 2013-05-08
  Type: Initial release
  
• Version 1.1: 2024-05-01
  Changes: Data collection, Database references, Derived calculations