2GW0

A D(TGGGGT)- sodium and calcium complex.

• PDB DOI: https://doi.org/10.2210/pdb2GW0/pdb
• NAKB: 2GW0

• Classification: DNA
• Mutation(s): No 


• Deposited: 2006-05-03 Released: 2007-05-15 
• Deposition Author(s): Lee, M.P.H., Parkinson, G.N., Neidle, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.55 Å
• R-Value Free: 0.224 
• R-Value Observed: 0.174 

Starting Model: experimental

Literature

Observation of the coexistence of sodium and calcium ions in a DNA G-quadruplex ion channel.

Lee, M.P., Parkinson, G.N., Hazel, P., Neidle, S.

(2007) J Am Chem Soc 129: 10106-10107

• PubMed: 17661470 
• DOI: https://doi.org/10.1021/ja0740869
• Primary Citation of Related Structures:  
  2GW0

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Organizational Affiliation: 

CRUK Biomolecular Structure Group, The School of Pharmacy, University of London, 29-39 Brunswick Square, London WC1N 1AX, U.K.

Biological Assembly 1  

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 15.45 kDa 
• Atom Count: 1,171 
• Modelled Residue Count: 48 
• Deposited Residue Count: 48 
• Unique nucleic acid chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Length	Organism	Image
5'-D(*TP*GP*GP*GP*GP*T)-3'	A, B, C, D, E, F, G, H	6	N/A

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CA	J [auth A], K [auth A], L [auth A], M [auth A], N [auth B], O [auth B], P [auth D], Q [auth D]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N
NA	I [auth A], R [auth E], S [auth E], T [auth F]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.55 Å
• R-Value Free: 0.224 
• R-Value Observed: 0.174 
• Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 27.357	α = 89.11
b = 27.911	β = 75.63
c = 34.969	γ = 79.7

Software Package:

Software Name	Purpose
SHELXL-97	refinement
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
EPMR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-05-15 
Deposition Author(s): Lee, M.P.H., Parkinson, G.N., Neidle, S.

Revision History  

• Version 1.0: 2007-05-15
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-10-18
  Changes: Refinement description
• Version 1.4: 2019-07-24
  Changes: Data collection, Refinement description
• Version 1.5: 2023-08-30
  Changes: Data collection, Database references, Derived calculations, Refinement description