1EVO

NMR OBSERVATION OF A NOVEL C-TETRAD


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 10 
  • Conformers Submitted: 10 
  • Selection Criteria: all calculated structures submitted 

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This is version 1.2 of the entry. See complete history


Literature

NMR observation of a novel C-tetrad in the structure of the SV40 repeat sequence GGGCGG.

Patel, P.K.Bhavesh, N.S.Hosur, R.V.

(2000) Biochem Biophys Res Commun 270: 967-971

  • DOI: 10.1006/bbrc.2000.2479
  • Primary Citation of Related Structures:  
    1EVO

  • PubMed Abstract: 
  • We report the NMR structure of the DNA sequence d-TGGGCGGT in Na(+) solutions at neutral pH, containing a repeat sequence from SV40 viral genome. The structure is a novel quadruplex incorporating the C-tetrad formed by symmetrical pairing of four Cs via NH(2)&bond;O(2) H-bonds in a plane ...

    We report the NMR structure of the DNA sequence d-TGGGCGGT in Na(+) solutions at neutral pH, containing a repeat sequence from SV40 viral genome. The structure is a novel quadruplex incorporating the C-tetrad formed by symmetrical pairing of four Cs via NH(2)&bond;O(2) H-bonds in a plane. The C-tetrad has a wider cavity compared to G-tetrads and stacks well over the adjacent G4-tetrad, but poorly on the G6 tetrad. The quadruplex helix is largely underwound by 8-10 degrees compared to B-DNA except at the C5-G6 step. To our knowledge this is the first report of C-tetrad formation in DNA structures, and would be of significance from the point of view of both structural diversity and specific recognition.


    Organizational Affiliation

    Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai, 400 005, India.



Macromolecules
  • Find similar nucleic acids by:  Sequence   |   Structure
  • Entity ID: 1
    MoleculeChainsLengthOrganismImage
    DNA (5'-D(*TP*GP*GP*GP*CP*GP*GP*T)-3')A [auth O], B [auth P], C [auth Q], D [auth R]8N/A
    Protein Feature View
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    • Reference Sequence
    Experimental Data & Validation

    Experimental Data

    • Method: SOLUTION NMR
    • Conformers Calculated: 10 
    • Conformers Submitted: 10 
    • Selection Criteria: all calculated structures submitted 
    • OLDERADO: 1EVO Olderado

    Structure Validation

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    Entry History 

    Deposition Data

    Revision History  (Full details and data files)

    • Version 1.0: 2000-05-01
      Type: Initial release
    • Version 1.1: 2008-04-27
      Changes: Version format compliance
    • Version 1.2: 2011-07-13
      Changes: Version format compliance