3ICX

Crystal structure of Sulfolobus solfataricus Nop5 (135-380)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.261 
  • R-Value Observed: 0.263 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural organization of box C/D RNA-guided RNA methyltransferase.

Ye, K.Jia, R.Lin, J.Ju, M.Peng, J.Xu, A.Zhang, L.

(2009) Proc Natl Acad Sci U S A 106: 13808-13813

  • DOI: 10.1073/pnas.0905128106
  • Primary Citation of Related Structures:  
    3ICX, 3ID5, 3ID6

  • PubMed Abstract: 
  • Box C/D guide RNAs are abundant noncoding RNAs that primarily function to direct the 2'-O-methylation of specific nucleotides by base-pairing with substrate RNAs. In archaea, a bipartite C/D RNA assembles with L7Ae, Nop5, and the methyltransferase fibrillarin into a modification enzyme with unique substrate specificity ...

    Box C/D guide RNAs are abundant noncoding RNAs that primarily function to direct the 2'-O-methylation of specific nucleotides by base-pairing with substrate RNAs. In archaea, a bipartite C/D RNA assembles with L7Ae, Nop5, and the methyltransferase fibrillarin into a modification enzyme with unique substrate specificity. Here, we determined the crystal structure of an archaeal C/D RNA-protein complex (RNP) composed of all 3 core proteins and an engineered half-guide RNA at 4 A resolution, as well as 2 protein substructures at higher resolution. The RNP structure reveals that the C-terminal domains of Nop5 in the dimeric complex provide symmetric anchoring sites for 2 L7Ae-associated kink-turn motifs of the C/D RNA. A prominent protrusion in Nop5 seems to be important for guide RNA organization and function and for discriminating the structurally related U4 snRNA. Multiple conformations of the N-terminal domain of Nop5 and its associated fibrillarin in different structures indicate the inherent flexibility of the catalytic module, suggesting that a swinging motion of the catalytic module is part of the enzyme mechanism. We also built a model of a native C/D RNP with substrate and fibrillarin in an active conformation. Our results provide insight into the overall organization and mechanism of action of C/D RNA-guided RNA methyltransferases.


    Organizational Affiliation

    National Institute of Biological Sciences, Beijing 102206, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Pre mRNA splicing proteinA, B, C255Saccharolobus solfataricusMutation(s): 0 
Gene Names: SSO0939
UniProt
Find proteins for Q97ZH3 (Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2))
Explore Q97ZH3 
Go to UniProtKB:  Q97ZH3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ97ZH3
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.261 
  • R-Value Observed: 0.263 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 153.645α = 90
b = 122.126β = 107.67
c = 71.786γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
MAR345data collection

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

  • Deposited Date: 2009-07-19 
  • Released Date: 2009-08-25 
  • Deposition Author(s): Ye, K.

Revision History  (Full details and data files)

  • Version 1.0: 2009-08-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description