1GRZ

A PREORGANIZED ACTIVE SITE IN THE CRYSTAL STRUCTURE OF THE TETRAHYMENA RIBOZYME


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 5 Å
  • R-Value Free: 0.428 
  • R-Value Work: 0.369 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A preorganized active site in the crystal structure of the Tetrahymena ribozyme.

Golden, B.L.Gooding, A.R.Podell, E.R.Cech, T.R.

(1998) Science 282: 259-264


  • PubMed Abstract: 
  • Group I introns possess a single active site that catalyzes the two sequential reactions of self-splicing. An RNA comprising the two domains of the Tetrahymena thermophila group I intron catalytic core retains activity, and the 5.0 angstrom crystal s ...

    Group I introns possess a single active site that catalyzes the two sequential reactions of self-splicing. An RNA comprising the two domains of the Tetrahymena thermophila group I intron catalytic core retains activity, and the 5.0 angstrom crystal structure of this 247-nucleotide ribozyme is now described. Close packing of the two domains forms a shallow cleft capable of binding the short helix that contains the 5' splice site. The helix that provides the binding site for the guanosine substrate deviates significantly from A-form geometry, providing a tight binding pocket. The binding pockets for both the 5' splice site helix and guanosine are formed and oriented in the absence of these substrates. Thus, this large ribozyme is largely preorganized for catalysis, much like a globular protein enzyme.


    Related Citations: 
    • Crystal structure of a group I ribozyme domain: Principles of RNA packing
      Cate, J.H.,Gooding, A.R.,Podell, E.R.,Zhou, K.,Golden, B.L.,Kundrot, C.E.,Cech, T.R.,Doudna, J.A.
      (1996) Science 273: 1678
    • A strategy for crystallization of a ribozyme derived from the Tetrahymena group I intron
      Golden, B.L.,Podell, E.R.,Gooding, A.R.,Cech, T.R.
      (1997) J.Mol.Biol. 270: 711


    Organizational Affiliation

    Howard Hughes Medical Institute, Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309-0215, USA. bgolden@petunia.colorado.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsLengthOrganism
LSU R-RNA GROUP I INTRONA,B247Tetrahymena thermophila
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 5 Å
  • R-Value Free: 0.428 
  • R-Value Work: 0.369 
  • Space Group: P 42 21 2
Unit Cell:
Length (Å)Angle (°)
a = 179.000α = 90.00
b = 179.000β = 90.00
c = 199.300γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
PHASESphasing
CNSrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-11-24
    Type: Initial release
  • Version 1.1: 2008-05-22
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance