4B6E

Discovery of an allosteric mechanism for the regulation of HCV NS3 protein function


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.46 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.191 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Discovery of an Allosteric Mechanism for the Regulation of Hcv Ns3 Protein Function.

Saalau-Bethell, S.M.Woodhead, A.J.Chessari, G.Carr, M.G.Coyle, J.Graham, B.Hiscock, S.D.Murray, C.W.Pathuri, P.Rich, S.J.Richardson, C.J.Williams, P.A.Jhoti, H.

(2012) Nat Chem Biol 8: 920

  • DOI: 10.1038/nchembio.1081
  • Primary Citation of Related Structures:  
    4B6E, 4B6F, 4B71, 4B73, 4B74, 4B75, 4B76

  • PubMed Abstract: 
  • Here we report a highly conserved new binding site located at the interface between the protease and helicase domains of the hepatitis C virus (HCV) NS3 protein. Using a chemical lead, identified by fragment screening and structure-guided design, we demonstrate that this site has a regulatory function on the protease activity via an allosteric mechanism ...

    Here we report a highly conserved new binding site located at the interface between the protease and helicase domains of the hepatitis C virus (HCV) NS3 protein. Using a chemical lead, identified by fragment screening and structure-guided design, we demonstrate that this site has a regulatory function on the protease activity via an allosteric mechanism. We propose that compounds binding at this allosteric site inhibit the function of the NS3 protein by stabilizing an inactive conformation and thus represent a new class of direct-acting antiviral agents.


    Organizational Affiliation

    Astex Pharmaceuticals, Cambridge Science Park, Cambridge, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
NON-STRUCTURAL PROTEIN 4A, SERINE PROTEASE NS3A, B683Hepatitis C virus (isolate BK)Mutation(s): 0 
EC: 3.4.21.98 (PDB Primary Data), 3.6.1.15 (PDB Primary Data), 3.6.4.13 (PDB Primary Data), 3.4.22 (UniProt), 2.7.7.48 (UniProt)
UniProt
Find proteins for P26663 (Hepatitis C virus genotype 1b (isolate BK))
Explore P26663 
Go to UniProtKB:  P26663
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
10L
Query on 10L

Download Ideal Coordinates CCD File 
E [auth B]1H-indazol-7-amine
C7 H7 N3
OTFFCAGPSWJBDK-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
C [auth A], D [auth B]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
10L BindingDB:  4B6E IC50: 5.00e+6 (nM) from 1 assay(s)
PDBBind:  4B6E IC50: 5.00e+6 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.46 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.191 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 91.404α = 90
b = 111.309β = 90
c = 141.84γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
CSEARCHphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-10-03
    Type: Initial release
  • Version 1.1: 2012-10-31
    Changes: Database references
  • Version 1.2: 2013-02-06
    Changes: Atomic model