7ZVV

Crystal Structure of Unlinked NS2B-NS3 Protease from Zika Virus in Complex with Inhibitor MI-2196


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.189 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 2.2 of the entry. See complete history


Literature

Synthesis and structural characterization of new macrocyclic inhibitors of the Zika virus NS2B-NS3 protease.

Huber, S.Braun, N.J.Schmacke, L.C.Murra, R.Bender, D.Hildt, E.Heine, A.Steinmetzer, T.

(2024) Arch Pharm (Weinheim) : e2400250-e2400250

  • DOI: https://doi.org/10.1002/ardp.202400250
  • Primary Citation of Related Structures:  
    7ZPD, 7ZQ1, 7ZQF, 7ZTM, 7ZUM, 7ZV4, 7ZVV, 7ZW5, 7ZYS, 8A15, 8AQA, 8AQB, 8AQK

  • PubMed Abstract: 

    Three new series of macrocyclic active site-directed inhibitors of the Zika virus (ZIKV) NS2B-NS3 protease were synthesized. First, attempts were made to replace the basic P3 lysine residue of our previously described inhibitors with uncharged and more hydrophobic residues. This provided numerous compounds with inhibition constants between 30 and 50 nM. A stronger reduction of the inhibitory potency was observed when the P2 lysine was replaced by neutral residues, all of these inhibitors possess K i values >1 µM. However, it is possible to replace the P2 lysine with the less basic 3-aminomethylphenylalanine, which provides a similarly potent inhibitor of the ZIKV protease (K i  = 2.69 nM). Crystal structure investigations showed that the P2 benzylamine structure forms comparable interactions with the protease as lysine. Twelve additional structures of these inhibitors in complex with the protease were determined, which explain many, but not all, SAR data obtained in this study. All individual modifications in the P2 or P3 position resulted in inhibitors with low antiviral efficacy in cell culture. Therefore, a third inhibitor series with combined modifications was synthesized; all of them contain a more hydrophobic  d-cyclohexylalanine in the linker segment. At a concentration of 40 µM, two of these compounds possess similar antiviral potency as ribavirin at 100 µM. Due to their reliable crystallization in complex with the ZIKV protease, these cyclic compounds are very well suited for a rational structure-based development of improved inhibitors.


  • Organizational Affiliation

    Institute of Pharmaceutical Chemistry, Philipps University of Marburg, Marburg, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Serine protease subunit NS2B53Zika virusMutation(s): 0 
UniProt
Find proteins for Q32ZE1 (Zika virus)
Explore Q32ZE1 
Go to UniProtKB:  Q32ZE1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ32ZE1
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Serine protease NS3178Zika virusMutation(s): 0 
EC: 3.4.21.91 (PDB Primary Data), 3.6.1.15 (PDB Primary Data), 3.6.4.13 (PDB Primary Data)
UniProt
Find proteins for Q32ZE1 (Zika virus)
Explore Q32ZE1 
Go to UniProtKB:  Q32ZE1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ32ZE1
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
3CF (Subject of Investigation/LOI)
Query on 3CF

Download Ideal Coordinates CCD File 
G [auth B]3-cyano-L-phenylalanine
C10 H10 N2 O2
ZHUOMTMPTNZOJE-VIFPVBQESA-N
4CF (Subject of Investigation/LOI)
Query on 4CF

Download Ideal Coordinates CCD File 
F [auth B]4-cyano-L-phenylalanine
C10 H10 N2 O2
KWIPUXXIFQQMKN-VIFPVBQESA-N
V7T (Subject of Investigation/LOI)
Query on V7T

Download Ideal Coordinates CCD File 
C [auth B](2R)-6-azanyl-2-carbamimidamido-hexanoic acid
C7 H16 N4 O2
FCYNCKFWUCHGHB-RXMQYKEDSA-N
ZAL (Subject of Investigation/LOI)
Query on ZAL

Download Ideal Coordinates CCD File 
D [auth B]3-cyclohexyl-D-alanine
C9 H17 N O2
ORQXBVXKBGUSBA-MRVPVSSYSA-N
V8N (Subject of Investigation/LOI)
Query on V8N

Download Ideal Coordinates CCD File 
E [auth B]2-[3-(aminomethyl)phenyl]ethanoic acid
C9 H11 N O2
OMILONVYAUZURK-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.189 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.635α = 90
b = 60.645β = 90
c = 80.388γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing
Cootmodel building

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Not funded--

Revision History  (Full details and data files)

  • Version 1.0: 2023-05-24
    Type: Initial release
  • Version 2.0: 2023-11-15
    Changes: Atomic model, Data collection, Derived calculations
  • Version 2.1: 2024-02-07
    Changes: Refinement description
  • Version 2.2: 2024-06-12
    Changes: Database references