Structure of the zinc-binding domain of HCV NS5A

Experimental Data Snapshot

  • Resolution: 2.50 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.227 

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Structure of the zinc-binding domain of an essential component of the hepatitis C virus replicase.

Tellinghuisen, T.L.Marcotrigiano, J.Rice, C.M.

(2005) Nature 435: 374-379

  • DOI: https://doi.org/10.1038/nature03580
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Hepatitis C virus (HCV) is a human pathogen affecting nearly 3% of the world's population. Chronic infections can lead to cirrhosis and liver cancer. The RNA replication machine of HCV is a multi-subunit membrane-associated complex. The non-structural protein NS5A is an active component of HCV replicase, as well as a pivotal regulator of replication and a modulator of cellular processes ranging from innate immunity to dysregulated cell growth. NS5A is a large phosphoprotein (56-58 kDa) with an amphipathic alpha-helix at its amino terminus that promotes membrane association. After this helix region, NS5A is organized into three domains. The N-terminal domain (domain I) coordinates a single zinc atom per protein molecule. Mutations disrupting either the membrane anchor or zinc binding of NS5A are lethal for RNA replication. However, probing the role of NS5A in replication has been hampered by a lack of structural information about this multifunctional protein. Here we report the structure of NS5A domain I at 2.5-A resolution, which contains a novel fold, a new zinc-coordination motif and a disulphide bond. We use molecular surface analysis to suggest the location of protein-, RNA- and membrane-interaction sites.

  • Organizational Affiliation

    Laboratory of Virology and Infectious Disease, Center for the Study of Hepatitis C, The Rockefeller University, 1230 York Avenue Box 64, New York, New York 10021, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
non-structural polyprotein
A, B
163Hepacivirus hominisMutation(s): 0 
Gene Names: Nonstructural protein 5A
EC: 3.4.22 (UniProt), (UniProt), (UniProt), (UniProt), (UniProt)
Find proteins for Q9WMX2 (Hepatitis C virus genotype 1b (isolate Con1))
Explore Q9WMX2 
Go to UniProtKB:  Q9WMX2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9WMX2
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.50 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.227 
  • Space Group: P 41 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.28α = 90
b = 55.28β = 90
c = 312.3γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
HKL-2000data reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-05-24
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance