464D

DISORDER AND TWIN REFINEMENT OF RNA HEPTAMER DOUBLE HELIX


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.23 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.127 
  • R-Value Observed: 0.129 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Disorder and twin refinement of RNA heptamer double helices.

Mueller, U.Muller, Y.A.Herbst-Irmer, R.Sprinzl, M.Heinemann, U.

(1999) Acta Crystallogr D Biol Crystallogr 55: 1405-1413

  • DOI: 10.1107/s0907444999007441
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • An RNA helix with seven base pairs which was derived from the acceptor stem of Escherichia coli tRNA(Ala), rGGGGCUA.rUAGCUCC (ALA(wt)), as well as a variant, rGGGGCUA.rUAGCCCC (ALA(C70)), in which the single G.U wobble base pair of ALA(wt) was replac ...

    An RNA helix with seven base pairs which was derived from the acceptor stem of Escherichia coli tRNA(Ala), rGGGGCUA.rUAGCUCC (ALA(wt)), as well as a variant, rGGGGCUA.rUAGCCCC (ALA(C70)), in which the single G.U wobble base pair of ALA(wt) was replaced by G.C, crystallize in space group C2. Both non-isomorphic crystal forms display a complex packing pattern, which can be described alternatively as disorder or pseudo-merohedral twinning. The structure of ALA(wt) was determined by SIRAS phasing using an isomorphous iodine derivative, rGGGGCi(5)UA.rUAGCUCC (ALA(I)). All three RNA structures were subsequently subjected to twin refinement in space group P1, using anisotropic thermal displacement parameters at resolutions of 1.16, 1.23 and 1.4 A for ALA(wt), ALA(I) and ALA(C70), respectively. Alternatively, the structure of ALA(wt) was refined in space group C2 assuming twofold disorder of the molecular orientation. The refined structures are of reasonable quality according to all available indicators. There are no systematic differences between the molecular models resulting from twin refinement and disorder refinement.


    Organizational Affiliation

    Forschungsgruppe Kristallographie, Max-Delbrück-Centrum für Molekulare Medizin, Robert-Rössle-Strasse 10, D-13092 Berlin, Germany.



Macromolecules
  • Find similar nucleic acids by: Sequence   |   Structure
Entity ID: 1
MoleculeChainsLengthOrganism
RNA (5'-R(*UP*AP*GP*CP*UP*CP*C)-3')A, C7N/A
  • Find similar nucleic acids by: Sequence   |   Structure
Entity ID: 2
MoleculeChainsLengthOrganism
RNA (5'-R(*GP*GP*GP*GP*CP*(IU)P*A)-3')B, D7N/A
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SR
Query on SR

Download CCD File 
B
STRONTIUM ION
Sr
PWYYWQHXAPXYMF-UHFFFAOYSA-N
 Ligand Interaction
NA
Query on NA

Download CCD File 
B
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.23 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.127 
  • R-Value Observed: 0.129 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 26.375α = 110.37
b = 28.995β = 96.62
c = 28.995γ = 96.62
Software Package:
Software NamePurpose
SHELXL-97refinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-08-16
    Type: Initial release
  • Version 1.1: 2008-05-22
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance