3ZD0 image
Entry Detail
PDB ID:
3ZD0
Title:
The Solution Structure of Monomeric Hepatitis C Virus p7 Yields Potent Inhibitors of Virion Release
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2012-11-23
Release Date:
2013-09-04
Method Details:
Experimental Method:
Conformers Calculated:
30
Conformers Submitted:
20
Selection Criteria:
ENERGY
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:P7 PROTEIN
Chain IDs:A
Chain Length:86
Number of Molecules:1
Biological Source:HEPATITIS C VIRUS
Ligand Molecules
Primary Citation
Structure-Guided Design Affirms Inhibitors of Hepatitis C Virus P7 as a Viable Class of Antivirals Targeting Virion Release
Hepatology 59 408 ? (2014)
PMID: 24022996 DOI: 10.1002/HEP.26685

Abstact

UNLABELLED Current interferon-based therapy for hepatitis C virus (HCV) infection is inadequate, prompting a shift toward combinations of direct-acting antivirals (DAA) with the first protease-targeted drugs licensed in 2012. Many compounds are in the pipeline yet primarily target only three viral proteins, namely, NS3/4A protease, NS5B polymerase, and NS5A. With concerns growing over resistance, broadening the repertoire for DAA targets is a major priority. Here we describe the complete structure of the HCV p7 protein as a monomeric hairpin, solved using a novel combination of chemical shift and nuclear Overhauser effect (NOE)-based methods. This represents atomic resolution information for a full-length virus-coded ion channel, or "viroporin," whose essential functions represent a clinically proven class of antiviral target exploited previously for influenza A virus therapy. Specific drug-protein interactions validate an allosteric site on the channel periphery and its relevance is demonstrated by the selection of novel, structurally diverse inhibitory small molecules with nanomolar potency in culture. Hit compounds represent a 10,000-fold improvement over prototypes, suppress rimantadine resistance polymorphisms at submicromolar concentrations, and show activity against other HCV genotypes. CONCLUSION This proof-of-principle that structure-guided design can lead to drug-like molecules affirms p7 as a much-needed new target in the burgeoning era of HCV DAA.

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