3IFF

2'-SeMe-A modified DNA decamer

• PDB DOI:  https://doi.org/10.2210/pdb3IFF/pdb
• NAKB: 3IFF

• Classification: DNA
• Mutation(s): No 


• Deposited: 2009-07-24 Released: 2009-08-11 
• Deposition Author(s): Sheng, J., Gan, J., Salon, J., Huang, Z.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free: 0.278 
• R-Value Work: 0.202 
• R-Value Observed: 0.206 

Literature

Selenium modification at 2'-position of adenosine for nucleic acid structure studies

Sheng, J., Gan, J., Salon, J., Huang, Z.

To be published.

Biological Assembly 1  

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 6.35 kDa 
• Atom Count: 470 
• Modelled Residue Count: 20 
• Deposited Residue Count: 20 
• Unique nucleic acid chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Length	Organism	Image
DNA (5'-D(*GP*TP*AP*CP*GP*CP*GP*TP*(XUA)P*C)-3')	A, B	10	N/A

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MG	C [auth A], D [auth B], E [auth B]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free: 0.278 
• R-Value Work: 0.202 
• R-Value Observed: 0.206 
• Space Group: P 6₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 38.748	α = 90
b = 38.748	β = 90
c = 76.628	γ = 120

Software Package:

Software Name	Purpose
CBASS	data collection
PHASES	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2009-08-11 
Deposition Author(s): Sheng, J., Gan, J., Salon, J., Huang, Z.

Revision History  

• Version 1.0: 2009-08-11
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Advisory, Version format compliance
• Version 1.2: 2023-09-06
  Changes: Data collection, Database references, Derived calculations, Refinement description