4A1V

Co-Complex structure of NS3-4A protease with the optimized inhibitory peptide CP5-46A-4D5E


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.188 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

High Affinity Peptide Inhibitors of the Hepatitis C Virus Ns3-4A Protease Refractory to Common Resistant Mutants.

Kugler, J.Schmelz, S.Gentzsch, J.Haid, S.Pollmann, E.Van Den Heuvel, J.Franke, R.Pietschmann, T.Heinz, D.W.Collins, J.

(2012) J Biol Chem 287: 39224

  • DOI: 10.1074/jbc.M112.393843
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Hepatitis C virus (HCV) NS3-4A protease is essential for viral replication. All current small molecular weight drugs against NS3-4A are substrate peptidomimetics that have a similar binding and resistance profile. We developed inhibitory peptides (IP ...

    Hepatitis C virus (HCV) NS3-4A protease is essential for viral replication. All current small molecular weight drugs against NS3-4A are substrate peptidomimetics that have a similar binding and resistance profile. We developed inhibitory peptides (IPs) capping the active site and binding via a novel "tyrosine" finger at an alternative NS3-4A site that is of particular interest for further HCV drug development. The peptides are not cleaved due to a combination of geometrical constraints and impairment of the oxyanion hole function. Selection and optimization through combinatorial phagemid display, protein crystallography, and further modifications resulted in a 32-amino acid peptide with a K(i) of 0.53 nm. Inhibition of viral replication in cell culture was demonstrated by fusion to a cell-penetrating peptide. Negligible susceptibility to known (A156V and R155K) resistance mutations of the NS3-4A protease was observed. This work shows for the first time that antiviral peptides can target an intracellular site and reveals a novel druggable site on the HCV protease.


    Organizational Affiliation

    Research Group Directed Evolution, Helmholtz Centre for Infection Research (HZI), 38124 Braunschweig, Germany.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NON-STRUCTURAL PROTEIN 4A, SERINE PROTEASE NS3
A, B
203Hepatitis C virus subtype 1bMutation(s): 2 
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)
Find proteins for P26662 (Hepatitis C virus genotype 1b (isolate Japanese))
Go to UniProtKB:  P26662
  • Find similar proteins by: Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CP5-46A-4D5E
C, D
20synthetic constructMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download CCD File 
A
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download CCD File 
A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.188 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.92α = 90
b = 92.92β = 90
c = 82.77γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-09-19
    Type: Initial release
  • Version 1.1: 2012-11-21
    Changes: Database references, Structure summary