4A1X

Co-Complex structure of NS3-4A protease with the inhibitory peptide CP5-46-A (Synchrotron data)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.182 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 

wwPDB Validation   3D Report Full Report


This is version 1.2 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: https://doi.org/10.1074/jbc.M112.393843
  • Primary Citation of Related Structures:  
    4A1T, 4A1V, 4A1X

  • 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 (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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
NONSTRUCTURAL 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)
UniProt
Find proteins for P26662 (Hepatitis C virus genotype 1b (isolate Japanese))
Explore P26662 
Go to UniProtKB:  P26662
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP26662
Sequence Annotations
Expand
  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
CP5-46-A PEPTIDE
C, D
21synthetic constructMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download Ideal Coordinates CCD File 
E [auth A],
M [auth B]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
F [auth A]
G [auth A]
H [auth A]
I [auth A]
J [auth A]
F [auth A],
G [auth A],
H [auth A],
I [auth A],
J [auth A],
K [auth A],
L [auth A],
N [auth B],
O [auth B],
P [auth B],
Q [auth B],
R [auth B],
S [auth B]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.182 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.32α = 90
b = 93.32β = 90
c = 82.4γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-09-19
    Type: Initial release
  • Version 1.1: 2014-02-05
    Changes: Database references, Derived calculations, Other, Source and taxonomy
  • Version 1.2: 2023-12-20
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description