9HAJ | pdb_00009haj

Structure of compound 1 bound to SARS-CoV-2 main protease


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.28 Å
  • R-Value Free: 
    0.192 (Depositor), 0.198 (DCC) 
  • R-Value Work: 
    0.164 (Depositor), 0.175 (DCC) 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

Accelerating the Hit-To-Lead Optimization of a SARS-CoV-2 Mpro Inhibitor Series by Combining High-Throughput Medicinal Chemistry and Computational Simulations.

Hazemann, J.Kimmerlin, T.Mac Sweeney, A.Bourquin, G.Lange, R.Ritz, D.Richard-Bildstein, S.Regeon, S.Czodrowski, P.

(2025) J Med Chem 

  • DOI: https://doi.org/10.1021/acs.jmedchem.4c02941
  • Primary Citation of Related Structures:  
    9HAJ, 9HAK, 9HJH

  • PubMed Abstract: 

    In this study, we performed the hit-to-lead optimization of a SARS-CoV-2 Mpro diazepane hit (identified by computational methods in a previous work) by combining computational simulations with high-throughput medicinal chemistry (HTMC). Leveraging the 3D structural information of Mpro, we refined the original hit by targeting the S1 and S2 binding pockets of the protein. Additionally, we identified a novel exit vector pointing toward the S1' pocket, which significantly enhanced the binding affinity. This strategy enabled us to transform, rapidly with a limited number of compounds synthesized, a 14 μM hit into a potent 16 nM lead compound, for which key pharmacological properties were subsequently evaluated. This result demonstrated that combining computational technologies such as machine learning, molecular docking, and molecular dynamics simulation with HTMC can efficiently accelerate hit identification and subsequent lead generation.


  • Organizational Affiliation

    Drug Discovery Chemistry, Idorsia Pharmaceuticals Limited, Hegenheimermattweg 91, 4123 Allschwil, Switzerland.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
3C-like proteinase nsp5
A, B
306Severe acute respiratory syndrome coronavirus 2Mutation(s): 0 
EC: 3.4.22.69
UniProt
Find proteins for P0DTC1 (Severe acute respiratory syndrome coronavirus 2)
Explore P0DTC1 
Go to UniProtKB:  P0DTC1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DTC1
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.28 Å
  • R-Value Free:  0.192 (Depositor), 0.198 (DCC) 
  • R-Value Work:  0.164 (Depositor), 0.175 (DCC) 
Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 68.046α = 90
b = 99.654β = 90
c = 104.145γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
autoPROCdata reduction
autoPROCdata scaling
PHASERphasing

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: 2025-03-05
    Type: Initial release
  • Version 1.1: 2025-04-16
    Changes: Database references