1PNN

PEPTIDE NUCLEIC ACID (PNA) COMPLEXED WITH DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.235 
  • R-Value Work: 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


  • 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 proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsLengthOrganism
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
Entity ID: 2
MoleculeChainsLengthOrganism
DNA (5'-D(GP*AP*AP*GP*AP*AP*GP*AP*G)-3')B,D9N/A
Small Molecules
Modified Residues  3 Unique
IDChainsTypeFormula2D DiagramParent
CPN
Query on CPN
A, C
PEPTIDE-LIKEC10 H16 N5 O4

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TPN
Query on TPN
A, C
PEPTIDE-LIKEC11 H17 N4 O5

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IPN
Query on IPN
A, C
RNA LINKINGC10 H14 I N4 O5

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.187 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 73.380α = 90.00
b = 73.380β = 90.00
c = 141.280γ = 120.00
Software Package:
Software NamePurpose
DENZOdata reduction
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



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
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance