9HJH | pdb_00009hjh

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.20 Å
  • R-Value Free: 
    0.159 (Depositor), 0.170 (DCC) 
  • R-Value Work: 
    0.149 (Depositor), 0.164 (DCC) 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 

Created with Raphaël 2.3.0Worse 01 BetterLigand structure goodness of fit to experimental dataBest fitted A1IVKClick on this verticalbar to view details

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
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
A1IVK (Subject of Investigation/LOI)
Query on A1IVK

Download Ideal Coordinates CCD File 
C [auth A],
I [auth B]
(2~{R})-4-[(4-bromanyl-2-ethyl-phenyl)methyl]-1-(5-chloranylpyridin-3-yl)carbonyl-~{N}-ethyl-1,4-diazepane-2-carboxamide
C23 H28 Br Cl N4 O2
YIKIBEUOQMFPOE-OAQYLSRUSA-N
BR
Query on BR

Download Ideal Coordinates CCD File 
F [auth A],
G [auth A],
H [auth A]
BROMIDE ION
Br
CPELXLSAUQHCOX-UHFFFAOYSA-M
EDO
Query on EDO

Download Ideal Coordinates CCD File 
D [auth A],
E [auth A],
J [auth B],
K [auth B]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
NA
Query on NA

Download Ideal Coordinates CCD File 
L [auth B]SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.20 Å
  • R-Value Free:  0.159 (Depositor), 0.170 (DCC) 
  • R-Value Work:  0.149 (Depositor), 0.164 (DCC) 
Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.799α = 90
b = 101.274β = 90
c = 104.099γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
autoPROCdata reduction
autoPROCdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 

Created with Raphaël 2.3.0Worse 01 BetterLigand structure goodness of fit to experimental dataBest fitted A1IVKClick on this verticalbar to view details

Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Not funded--

Revision History  (Full details and data files)

  • Version 1.0: 2024-12-11
    Type: Initial release
  • Version 1.1: 2025-04-16
    Changes: Database references