2OIN

crystal structure of HCV NS3-4A R155K muntant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.203 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Phenotypic and structural analyses of hepatitis C virus NS3 protease Arg155 variants: sensitivity to telaprevir (VX-950) and interferon alpha.

Zhou, Y.Muh, U.Hanzelka, B.L.Bartels, D.J.Wei, Y.Rao, B.G.Brennan, D.L.Tigges, A.M.Swenson, L.Kwong, A.D.Lin, C.

(2007) J Biol Chem 282: 22619-22628

  • DOI: 10.1074/jbc.M610207200
  • Primary Citation of Related Structures:  
    2OIN

  • PubMed Abstract: 
  • Telaprevir (VX-950) is a highly selective, potent inhibitor of the hepatitis C virus (HCV) NS3.4A serine protease. It has demonstrated strong antiviral activity in patients chronically infected with genotype 1 HCV when dosed alone or in combination w ...

    Telaprevir (VX-950) is a highly selective, potent inhibitor of the hepatitis C virus (HCV) NS3.4A serine protease. It has demonstrated strong antiviral activity in patients chronically infected with genotype 1 HCV when dosed alone or in combination with peginterferon alfa-2a. Substitutions of Arg(155) of the HCV NS3 protease domain have been previously detected in HCV isolates from some patients during telaprevir dosing. In this study, Arg(155) was replaced with various residues in genotype 1a protease domain proteins and in genotype 1b HCV subgenomic replicons. Characterization of both the purified enzymes and reconstituted replicon cells demonstrated that substitutions of Arg(155) with these residues conferred low level resistance to telaprevir (<25-fold). An x-ray structure of genotype 1a HCV protease domain with the R155K mutation, in a complex with an NS4A co-factor peptide, was determined at a resolution of 2.5A. The crystal structure of the R155K protease is essentially identical to that of the wild-type apoenzyme (Protein Data Bank code 1A1R) except for the side chain of mutated residue 155. Telaprevir was docked into the x-ray structure of the R155K protease, and modeling analysis suggests that the P2 group of telaprevir loses several hydrophobic contacts with the Lys(155) side chain. It was demonstrated that replicon cells containing substitutions at NS3 protease residue 155 remain fully sensitive to interferon alpha or ribavirin. Finally, these variant replicons were shown to have reduced replication capacity compared with the wild-type HCV replicon in cells.


    Organizational Affiliation

    Vertex Pharmaceuticals Inc., Cambridge, Massachusetts 02139, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PolyproteinAB200Hepacivirus CMutation(s): 1 
Gene Names: NS3
EC: 3.4.22 (UniProt), 3.4.21.98 (UniProt), 3.6.1.15 (UniProt), 3.6.4.13 (UniProt), 2.7.7.48 (UniProt)
Find proteins for P27958 (Hepatitis C virus genotype 1a (isolate H77))
Explore P27958 
Go to UniProtKB:  P27958
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
NS4A peptideCD21N/AMutation(s): 0 
Find proteins for P27958 (Hepatitis C virus genotype 1a (isolate H77))
Explore P27958 
Go to UniProtKB:  P27958
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.203 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 225.31α = 90
b = 225.31β = 90
c = 75.66γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
CNXphasing
CNXrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2007-01-11 
  • Released Date: 2007-06-05 
  • Deposition Author(s): Wei, Y.

Revision History 

  • Version 1.0: 2007-06-05
    Type: Initial release
  • Version 1.1: 2008-01-14
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Refinement description