3P59

First Crystal Structure of a RNA Nanosquare

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.18 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.156 
  • R-Value Observed: 0.157 

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This is version 1.1 of the entry. See complete history. 


Literature

Self-assembling RNA square.

Dibrov, S.M., McLean, J., Parsons, J., Hermann, T.

(2011) Proc Natl Acad Sci U S A 108: 6405-6408

  • DOI: 10.1073/pnas.1017999108
  • Primary Citation of Related Structures:  
    3P59

  • PubMed Abstract: 

    • The three-dimensional structures of noncoding RNA molecules reveal recurring architectural motifs that have been exploited for the design of artificial RNA nanomaterials. Programmed assembly of RNA nanoobjects from autonomously folding tetraloop-receptor complexes as well as junction motifs has been achieved previously through sequence-directed hybridization of complex sets of long oligonucleotides ...

    The three-dimensional structures of noncoding RNA molecules reveal recurring architectural motifs that have been exploited for the design of artificial RNA nanomaterials. Programmed assembly of RNA nanoobjects from autonomously folding tetraloop-receptor complexes as well as junction motifs has been achieved previously through sequence-directed hybridization of complex sets of long oligonucleotides. Due to size and complexity, structural characterization of artificial RNA nanoobjects has been limited to low-resolution microscopy studies. Here we present the design, construction, and crystal structure determination at 2.2 Å of the smallest yet square-shaped nanoobject made entirely of double-stranded RNA. The RNA square is comprised of 100 residues and self-assembles from four copies each of two oligonucleotides of 10 and 15 bases length. Despite the high symmetry on the level of secondary structure, the three-dimensional architecture of the square is asymmetric, with all four corners adopting distinct folding patterns. We demonstrate the programmed self-assembly of RNA squares from complex mixtures of corner units and establish a concept to exploit the RNA square as a combinatorial nanoscale platform.

    Organizational Affiliation: 

    Department of Chemistry and Biochemistry, University of California at San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.



Macromolecules

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Entity ID: 1
MoleculeChainsLengthOrganismImage
RNA (5'-R(*CP*CP*GP*GP*AP*GP*GP*AP*AP*CP*UP*AP*CP*(5BU)P*G)-3')A, C, E, G 15N/A
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsLengthOrganismImage
RNA (5'-R(*CP*CP*GP*GP*CP*AP*GP*CP*CP*U)-3')B, D, F, H 10N/A
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.18 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.156 
  • R-Value Observed: 0.157 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.378α = 90
b = 62.378β = 90
c = 126.268γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
PHENIXmodel building
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-04-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance