205D

STRUCTURE OF AN RNA DOUBLE HELIX INCLUDING URACIL-URACIL BASE PAIRS IN AN INTERNAL LOOP

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.64 Å
  • R-Value Work: 0.197 
  • R-Value Observed: 0.197 

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This is version 1.2 of the entry. See complete history. 


Literature

Structure of an RNA double helix including uracil-uracil base pairs in an internal loop.

Baeyens, K.J., De Bondt, H.L., Holbrook, S.R.

(1995) Nat Struct Biol 2: 56-62

  • DOI: 10.1038/nsb0195-56
  • Primary Citation of Related Structures:  
    205D

  • PubMed Abstract: 

    • The crystal structure of the RNA dodecamer 5'-GGACUUUGGUCC-3' has been determined from X-ray diffraction data to 2.6 A resolution. This oligomer forms an asymmetric double helix in the crystal. Four consecutive non-Watson-Crick base-pairs are formed in the middle of the duplex including the first intrahelical U-U (or T-T) pairs observed in an oligonucleotide crystal structure ...

    The crystal structure of the RNA dodecamer 5'-GGACUUUGGUCC-3' has been determined from X-ray diffraction data to 2.6 A resolution. This oligomer forms an asymmetric double helix in the crystal. Four consecutive non-Watson-Crick base-pairs are formed in the middle of the duplex including the first intrahelical U-U (or T-T) pairs observed in an oligonucleotide crystal structure. Two different conformations of U-U pairs are observed in the context of the surrounding sequence. One of these pairs is highly twisted, allowing a bound water to bridge across strands in the major groove. The crystal packing illustrates a new form of RNA helix-helix interaction.

    Organizational Affiliation: 

    Structural Biology Division, Lawrence Berkeley Laboratory, University of California, Berkeley 94720.



Macromolecules

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Entity ID: 1
MoleculeChainsLengthOrganismImage
RNA (5'-R(*GP*GP*AP*CP*UP*UP*UP*GP*GP*UP*CP*C)-3')A, B 12N/A
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.64 Å
  • R-Value Work: 0.197 
  • R-Value Observed: 0.197 
  • Space Group: P 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 32.44α = 90
b = 32.44β = 90
c = 85.48γ = 90
Software Package:
Software NamePurpose
X-PLORrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1995-09-15
    Type: Initial release
  • Version 1.1: 2008-05-22
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance