241D

EXTENSION OF THE FOUR-STRANDED INTERCALATED CYTOSINE MOTIF BY ADENINE.ADENINE BASE PAIRING IN THE CRYSTAL STRUCTURE OF D(CCCAAT)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Work: 0.194 
  • R-Value Observed: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Extension of the four-stranded intercalated cytosine motif by adenine.adenine base pairing in the crystal structure of d(CCCAAT).

Berger, I.Kang, C.Fredian, A.Ratliff, R.Moyzis, R.Rich, A.

(1995) Nat Struct Biol 2: 416-425

  • DOI: 10.1038/nsb0595-416
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The crystal structure of d(CCCAAT), refined at 2.0 A resolution, shows a four stranded molecule in which two parallel duplexes intercalate with opposite polarity, using cytosine.protonated cytosine base pairs. The intercalation motif in this structur ...

    The crystal structure of d(CCCAAT), refined at 2.0 A resolution, shows a four stranded molecule in which two parallel duplexes intercalate with opposite polarity, using cytosine.protonated cytosine base pairs. The intercalation motif in this structure is extended by adenine.adenine base pairs. Two topologically distinct broad grooves are found in the lath-like central part of the molecule with the phosphate groups on one side bent over towards each other, stabilized by bridging water molecules. At the 3' ends, two arrangements of intermolecular A.A.T base triplets are found, involving both asymmetric and symmetric A.A base pairs joined to thymine residues by Watson-Crick and reverse Hoogsteen base pairing, respectively.


    Organizational Affiliation

    Department of Biology, Massachusetts Institute of Technology, Cambridge 02139, USA.



Macromolecules
  • Find similar nucleic acids by: Sequence   |   Structure
Entity ID: 1
MoleculeChainsLengthOrganism
DNA (5'-D(*CP*CP*CP*AP*AP*T)-3')A, B6N/A
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Work: 0.194 
  • R-Value Observed: 0.194 
  • Space Group: P 62
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 32.18α = 90
b = 32.18β = 90
c = 52.49γ = 120
Software Package:
Software NamePurpose
X-PLORrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-04-03
    Type: Initial release
  • Version 1.1: 2008-05-22
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance