1PNN

PEPTIDE NUCLEIC ACID (PNA) COMPLEXED WITH DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.187 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

A Nucleic Acid Triple Helix Formed by a Peptide Nucleic Acid-DNA Complex

Betts, L.Josey, J.A.Veal, J.M.Jordan, S.R.

(1995) Science 270: 1838-1841

  • DOI: 10.1126/science.270.5243.1838
  • Primary Citation of Related Structures:  
    1PNN

  • PubMed Abstract: 
  • The crystal structure of a nucleic acid triplex reveals a helix, designated P-form, that differs from previously reported nucleic acid structures. The triplex consists of one polypurine DNA strand complexed to a polypyrimidine hairpin peptide nucleic ...

    The crystal structure of a nucleic acid triplex reveals a helix, designated P-form, that differs from previously reported nucleic acid structures. The triplex consists of one polypurine DNA strand complexed to a polypyrimidine hairpin peptide nucleic acid (PNA) and was successfully designed to promote Watson-Crick and Hoogsteen base pairing. The P-form helix is underwound, with a base tilt similar to B-form DNA. The bases are displaced from the helix axis even more than in A-form DNA. Hydrogen bonds between the DNA backbone and the Hoogsteen PNA backbone explain the observation that polypyrimidine PNA sequences form highly stable 2:1 PNA-DNA complexes. This structure expands the number of known stable helical forms that nucleic acids can adopt.


    Related Citations: 
    • NMR Solution Structure of a Peptide Nucleic Acid Complexed with RNA
      Brown, S.C., Thomson, S.A., Veal, J.M., Davis, D.G.
      (1994) Science 265: 777

    Organizational Affiliation

    Glaxo Wellcome, Research Triangle Park, NC 27709, USA.



Macromolecules
Find similar nucleic acids by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsLengthOrganismImage
PNA (NH2-P(*C*T*C*T*T*C*T*T*C-HIS-GLY-SER-SER-GLY-HIS-C*T*T*C*T*T*C*T*C)-COOH)A, C24N/A
  • Find similar nucleic acids by:  Sequence   |   Structure
  • Entity ID: 2
    MoleculeChainsLengthOrganismImage
    DNA (5'-D(GP*AP*AP*GP*AP*AP*GP*AP*G)-3')B, D9N/A
    Experimental Data & Validation

    Experimental Data

    • Method: X-RAY DIFFRACTION
    • Resolution: 2.50 Å
    • R-Value Free: 0.235 
    • R-Value Work: 0.187 
    • R-Value Observed: 0.187 
    • Space Group: P 65 2 2
    Unit Cell:
    Length ( Å )Angle ( ˚ )
    a = 73.38α = 90
    b = 73.38β = 90
    c = 141.28γ = 120
    Software Package:
    Software NamePurpose
    X-PLORrefinement
    DENZOdata reduction

    Structure Validation

    View Full Validation Report



    Entry History 

    Deposition Data

    • Deposited Date: 1995-10-13 
    • Released Date: 1996-03-08 
    • Deposition Author(s): Betts, L., Veal, J.M.

    Revision History 

    • Version 1.0: 1996-03-08
      Type: Initial release
    • Version 1.1: 2008-05-22
      Changes: Version format compliance
    • Version 1.2: 2011-07-13
      Changes: Non-polymer description, Version format compliance