2BRK

Crystal structure of Hepatitis C virus polymerase in complex with an allosteric inhibitor (compound 1)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.184 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Interdomain Communication in Hepatitis C Virus Polymerase Abolished by Small-Molecule Inhibitors Bound to a Novel Allosteric Site

Di Marco, S.Volpari, C.Tomei, L.Altamura, S.Harper, S.Narjes, F.Koch, U.Rowley, M.De Francesco, R.Migliaccio, G.Carfi, A.

(2005) J.Biol.Chem. 280: 29765

  • DOI: 10.1074/jbc.M505423200
  • Primary Citation of Related Structures:  2BRL
  • Also Cited By: 2WCX

  • PubMed Abstract: 
  • The hepatitis C virus (HCV) polymerase is required for replication of the viral genome and is a key target for therapeutic intervention against HCV. We have determined the crystal structures of the HCV polymerase complexed with two indole-based allos ...

    The hepatitis C virus (HCV) polymerase is required for replication of the viral genome and is a key target for therapeutic intervention against HCV. We have determined the crystal structures of the HCV polymerase complexed with two indole-based allosteric inhibitors at 2.3- and 2.4-Angstroms resolution. The structures show that these inhibitors bind to a site on the surface of the thumb domain. A cyclohexyl and phenyl ring substituents, bridged by an indole moiety, fill two closely spaced pockets, whereas a carboxylate substituent forms a salt bridge with an exposed arginine side chain. Interestingly, in the apoenzyme, the inhibitor binding site is occupied by a small alpha-helix at the tip of the N-terminal loop that connects the fingers and thumb domains. Thus, these molecules inhibit the enzyme by preventing formation of intramolecular contacts between these two domains and consequently precluding their coordinated movements during RNA synthesis. Our structures identify a novel mechanism by which a new class of allosteric inhibitors inhibits the HCV polymerase and open the way to the development of novel antiviral agents against this clinically relevant human pathogen.


    Organizational Affiliation

    Istituto di Ricerche di Biologia Molecolare P. Angeletti, Pomezia (Rome), Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RNA-DIRECTED RNA POLYMERASE
A
536Hepatitis C virus genotype 1bEC: 3.6.1.15, 3.4.22.-, 3.6.4.13, 2.7.7.48, 3.4.21.98
Find proteins for P26663 (Hepatitis C virus genotype 1b)
Go to UniProtKB:  P26663
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download SDF File 
Download CCD File 
A
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
CMF
Query on CMF

Download SDF File 
Download CCD File 
A
3-CYCLOHEXYL-1-(2-MORPHOLIN-4-YL-2-OXOETHYL)-2-PHENYL-1H-INDOLE-6-CARBOXYLIC ACID
C27 H30 N2 O4
ZKEZEXYKYHYIMQ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.184 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 68.002α = 90.00
b = 94.488β = 90.00
c = 95.730γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
REFMACrefinement
MOSFLMdata reduction
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-06-14
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance