Crystal structure of the VS ribozyme - G638A mutant

Experimental Data Snapshot

  • Resolution: 3.07 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.180 

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This is version 2.0 of the entry. See complete history


Crystal structure of the Varkud satellite ribozyme.

Suslov, N.B.DasGupta, S.Huang, H.Fuller, J.R.Lilley, D.M.Rice, P.A.Piccirilli, J.A.

(2015) Nat Chem Biol 11: 840-846

  • DOI: https://doi.org/10.1038/nchembio.1929
  • Primary Citation of Related Structures:  
    4R4P, 4R4V

  • PubMed Abstract: 

    The Varkud satellite (VS) ribozyme mediates rolling-circle replication of a plasmid found in the Neurospora mitochondrion. We report crystal structures of this ribozyme from Neurospora intermedia at 3.1 Å resolution, which revealed an intertwined dimer formed by an exchange of substrate helices. In each protomer, an arrangement of three-way helical junctions organizes seven helices into a global fold that creates a docking site for the substrate helix of the other protomer, resulting in the formation of two active sites in trans. This mode of RNA-RNA association resembles the process of domain swapping in proteins and has implications for RNA regulation and evolution. Within each active site, adenine and guanine nucleobases abut the scissile phosphate, poised to serve direct roles in catalysis. Similarities to the active sites of the hairpin and hammerhead ribozymes highlight the functional importance of active-site features, underscore the ability of RNA to access functional architectures from distant regions of sequence space, and suggest convergent evolution.

  • Organizational Affiliation

    Cancer Research UK Nucleic Acid Structure Research Group, University of Dundee, Dundee, UK.

Find similar nucleic acids by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains LengthOrganismImage
VS ribozyme RNA186Neurospora
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on K

Download Ideal Coordinates CCD File 
C [auth A],
E [auth A],
J [auth A],
K [auth A],
L [auth A]
Query on MG

Download Ideal Coordinates CCD File 
B [auth A]
D [auth A]
F [auth A]
G [auth A]
H [auth A]
B [auth A],
D [auth A],
F [auth A],
G [auth A],
H [auth A],
I [auth A],
M [auth A],
N [auth A],
O [auth A]
Experimental Data & Validation

Experimental Data

  • Resolution: 3.07 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.180 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.229α = 90
b = 102.229β = 90
c = 215.02γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-09-30
    Type: Initial release
  • Version 1.1: 2015-11-04
    Changes: Database references
  • Version 2.0: 2022-06-08
    Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations