404D

CRYSTAL STRUCTURE OF THE RNA/DNA HYBRID R(GAAGAGAAGC). D(GCTTCTCTTC)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Work: 0.184 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The crystal structure of the RNA/DNA hybrid r(GAAGAGAAGC). d(GCTTCTCTTC) shows significant differences to that found in solution.

Conn, G.L.Brown, T.Leonard, G.A.

(1999) Nucleic Acids Res. 27: 555-561


  • PubMed Abstract: 
  • The crystal structure of the RNA/DNA hybrid r(GAAGAGAAGC). d(GCTTCTCTTC) has been solved and refined at 2.5 A resolution. The refinement procedure converged at R = 0.181 for all reflections in the range 20.0-2.5 A. In the crystal, the RNA/DNA hybrid ...

    The crystal structure of the RNA/DNA hybrid r(GAAGAGAAGC). d(GCTTCTCTTC) has been solved and refined at 2.5 A resolution. The refinement procedure converged at R = 0.181 for all reflections in the range 20.0-2.5 A. In the crystal, the RNA/DNA hybrid duplex has an A' conformation with all but one of the nucleotide sugar moieties adopting a C3'- endo (N) conformation. Both strands in the double helix adopt a global conformation close to the A-form and the width of the minor groove is typical of that found in the crystal structures of other A-form duplexes. However, differences are observed between the RNA and DNA strands that make up the hybrid at the local level. In the central portion of the duplex, the RNA strand has backbone alpha, beta and gamma torsion angles that alternate between the normal gauche -/ trans / gauche + conformation and an unusual trans / trans / trans conformation. Coupled with this so-called 'alpha/gamma flipping' of the backbone torsion angles, the distance between adjacent phosphorous atoms on the RNA strand systematically varies. Neither of these phenomena are observed on the DNA strand. The structure of the RNA/DNA hybrid presented here differs significantly from that found in solution for this and other sequences. Possible reasons for these differences and their implications for the current model of RNase H activity are discussed.


    Organizational Affiliation

    Department of Chemistry, University of Southampton, Southampton SO17 1BJ, UK and Joint ESRF/EMBLStructural Biology Group, European Synchrotron Radiation Facility, BP 200, F-38034 Grenoble Cedex, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsLengthOrganism
5'-R(*GP*AP*AP*GP*AP*GP*AP*AP*GP*C)-3'A10N/A
Entity ID: 2
MoleculeChainsLengthOrganism
5'-D(*GP*CP*TP*TP*CP*TP*CP*TP*TP*C)-3'B10N/A
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Work: 0.184 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 25.720α = 90.00
b = 45.550β = 90.00
c = 47.810γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
REFMACrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-12-14
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance