1L9K

dengue methyltransferase

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.231 
  • R-Value Observed: 0.275 

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


Literature

An RNA cap (nucleoside-2'-O-) methyltransferase in the flavivirus RNA polymerase NS5: crystal structure and functional characterization

Egloff, M.P., Benarroch, D., Selisko, B., Romette, J.L., Canard, B.

(2002) EMBO J 21: 2757-2768

  • DOI: 10.1093/emboj/21.11.2757
  • Primary Citation of Related Structures:  
    2P1D, 1L9K

  • PubMed Abstract: 

    • Viruses represent an attractive system with which to study the molecular basis of mRNA capping and its relation to the RNA transcription machinery. The RNA-dependent RNA polymerase NS5 of flaviviruses presents a characteristic motif of S-adenosyl-L-methi ...

    Viruses represent an attractive system with which to study the molecular basis of mRNA capping and its relation to the RNA transcription machinery. The RNA-dependent RNA polymerase NS5 of flaviviruses presents a characteristic motif of S-adenosyl-L-methionine-dependent methyltransferases at its N-terminus, and polymerase motifs at its C-terminus. The crystal structure of an N-terminal fragment of Dengue virus type 2 NS5 is reported at 2.4 A resolution. We show that this NS5 domain includes a typical methyltransferase core and exhibits a (nucleoside-2'-O-)-methyltransferase activity on capped RNA. The structure of a ternary complex comprising S-adenosyl-L-homocysteine and a guanosine triphosphate (GTP) analogue shows that 54 amino acids N-terminal to the core provide a novel GTP-binding site that selects guanine using a previously unreported mechanism. Binding studies using GTP- and RNA cap-analogues, as well as the spatial arrangement of the methyltransferase active site relative to the GTP-binding site, suggest that the latter is a specific cap-binding site. As RNA capping is an essential viral function, these results provide a structural basis for the rational design of drugs against the emerging flaviviruses.

    Organizational Affiliation: 

    Architecture et Fonction des Macromolécules Biologiques, UMR 6098 CNRS et Université Aix-Marseille I et II, ESIL, Campus de Luminy, F-13288 Marseille Cedex 09, France.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
RNA-DIRECTED RNA POLYMERASE A305Dengue virus 2Mutation(s): 7 
Gene Names: NS5 New Guinea C
EC: 2.7.7.48 (PDB Primary Data), 3.4.21.91 (UniProt), 3.6.1.15 (UniProt), 3.6.4.13 (UniProt), 2.1.1.56 (UniProt), 2.1.1.57 (UniProt)
Find proteins for P12823 (Dengue virus type 2 (strain Puerto Rico/PR159-S1/1969))
Explore P12823 
Go to UniProtKB:  P12823
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.231 
  • R-Value Observed: 0.275 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 111.56α = 90
b = 111.56β = 90
c = 56.33γ = 120
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
CCP4data scaling
MLPHAREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-03-25
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Source and taxonomy, Version format compliance