1FW5

SOLUTION STRUCTURE OF MEMBRANE BINDING PEPTIDE OF SEMLIKI FOREST VIRUS MRNA CAPPING ENZYME NSP1


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Membrane binding mechanism of an RNA virus-capping enzyme.

Lampio, A.Kilpelainen, I.Pesonen, S.Karhi, K.Auvinen, P.Somerharju, P.Kaariainen, L.

(2001) J Biol Chem 275: 37853-37859

  • DOI: 10.1074/jbc.M004865200
  • Primary Citation of Related Structures:  
    1FW5

  • PubMed Abstract: 
  • The RNA replication complex of Semliki Forest virus is bound to cytoplasmic membranes via the mRNA-capping enzyme Nsp1. Here we have studied the structure and liposome interactions of a synthetic peptide (245)GSTLYTESRKLLRSWHLPSV(264) corresponding to the membrane binding domain of Nsp1 ...

    The RNA replication complex of Semliki Forest virus is bound to cytoplasmic membranes via the mRNA-capping enzyme Nsp1. Here we have studied the structure and liposome interactions of a synthetic peptide (245)GSTLYTESRKLLRSWHLPSV(264) corresponding to the membrane binding domain of Nsp1. The peptide interacted with liposomes only if negatively charged lipids were present that induced a structural change in the peptide from a random coil to a partially alpha-helical conformation. NMR structure shows that the alpha-helix is amphipathic, the hydrophobic surface consisting of several leucines, a valine, and a tryptophan moiety (Trp-259). Fluorescence studies revealed that this tryptophan intercalates in the bilayer to the depth of the ninth and tenth carbons of lipid acyl chains. Mutation W259A altered the mode of bilayer association of the peptide and abolished its ability to compete for membrane association of intact Nsp1, demonstrating its crucial role in the membrane association and function of Nsp1.


    Organizational Affiliation

    Program in Cellular Biotechnology and NMR Laboratory, Institute of Biotechnology, Viikki Biocenter P. O. Box 56, Helsinki, Finland.



Macromolecules
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
NONSTRUCTURAL PROTEIN NSP1A20N/AMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P08411 (Semliki forest virus)
Explore P08411 
Go to UniProtKB:  P08411
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 
  • OLDERADO: 1FW5 Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-09-21
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance