NMR structure of the membrane anchor domain (1-31) of the nonstructural protein 5A (NS5A) of hepatitis C virus (Minimized average structure, Sample in 50% tfe)

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 

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Structure and function of the membrane anchor domain of hepatitis C virus nonstructural protein 5A.

Penin, F.Brass, V.Appel, N.Ramboarina, S.Montserret, R.Ficheux, D.Blum, H.E.Bartenschlager, R.Moradpour, D.

(2004) J Biol Chem 279: 40835-40843

  • DOI: https://doi.org/10.1074/jbc.M404761200
  • Primary Citation of Related Structures:  
    1R7C, 1R7D, 1R7E, 1R7F, 1R7G

  • PubMed Abstract: 

    Hepatitis C virus (HCV) nonstructural protein 5A (NS5A) is a membrane-associated, essential component of the viral replication complex. Here, we report the three-dimensional structure of the membrane anchor domain of NS5A as determined by NMR spectroscopy. An alpha-helix extending from amino acid residue 5 to 25 was observed in the presence of different membrane mimetic media. This helix exhibited a hydrophobic, Trprich side embedded in detergent micelles, while the polar, charged side was exposed to the solvent. Thus, the NS5A membrane anchor domain forms an in-plane amphipathic alpha-helix embedded in the cytosolic leaflet of the membrane bilayer. Interestingly, mutations affecting the positioning of fully conserved residues located at the cytosolic surface of the helix impaired HCV RNA replication without interfering with the membrane association of NS5A. In conclusion, the NS5A membrane anchor domain constitutes a unique platform that is likely involved in specific interactions essential for the assembly of the HCV replication complex and that may represent a novel target for antiviral intervention.

  • Organizational Affiliation

    Institut de Biologie et Chimie des Protéines, CNRS-UMR 5086, IFR128 BioSciences, Lyon-Gerland, Lyon F-69367, Cedex 07, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Genome polyprotein31N/AMutation(s): 0 
Find proteins for P27958 (Hepatitis C virus genotype 1a (isolate H77))
Explore P27958 
Go to UniProtKB:  P27958
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP27958
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-08-10
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-03-02
    Changes: Database references, Derived calculations