9DDF | pdb_00009ddf

SARS-CoV-2 main protease with inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 
    0.251 (Depositor), 0.239 (DCC) 
  • R-Value Work: 
    0.225 (Depositor), 0.214 (DCC) 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Discovery of Highly Potent Noncovalent Inhibitors of SARS-CoV-2 Main Protease through Computer-Aided Drug Design.

Okabe, A.Carney, D.W.Tawada, M.Akther, T.Aida, J.Takagi, T.Dougan, D.R.Leffler, A.E.Bell, J.A.Frye, L.Hickey, E.R.Komandla, M.Tao, W.Selimkhanov, J.Yonemori, K.Chang, E.Saikatendu, K.Ochida, A.

(2025) J Med Chem 

  • DOI: https://doi.org/10.1021/acs.jmedchem.5c01199
  • Primary Citation of Related Structures:  
    9DDF, 9DDG, 9NU6

  • PubMed Abstract: 

    The COVID-19 pandemic has highlighted a clear need to ensure rapid and equitable global access to health interventions in preparation for future coronavirus-driven pandemics. Here, we report the discovery of highly potent noncovalent inhibitors of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) main protease (Mpro) with pan-coronavirus (pan-CoV) Mpro inhibition through computer-aided drug design. Virtual screening led to the identification of a noncovalent hit compound with a piperazine core. Structure-guided scaffold morphing provided a novel trisubstituted piperidine core. Free energy perturbation (FEP)-guided designs, with induced-fit of Met49/Met165 and Gln189, resulted in the identification of highly potent compound 30 , which exhibits pan-CoV Mpro inhibition and cellular antiviral efficacy against the SARS-CoV-2 omicron variant. The optimized lead compound 30 was characterized by in vitro ADME/Tox assays and in vivo mouse pharmacokinetics. These findings suggest that compound 30 could be an addition to the repertoire of tools used to support future pandemic preparedness.


  • Organizational Affiliation
    • Takeda Pharmaceutical Company Limited, 26-1 Muraoka-Higashi 2-chrome, Fujisawa, Kanagawa 251-8555, Japan.

Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
3C-like proteinase nsp5306Severe acute respiratory syndrome coronavirus 2Mutation(s): 0 
Gene Names: rep1a-1b
EC: 3.4.22.69
UniProt
Find proteins for P0DTD1 (Severe acute respiratory syndrome coronavirus 2)
Explore P0DTD1 
Go to UniProtKB:  P0DTD1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DTD1
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
A1A3N (Subject of Investigation/LOI)
Query on A1A3N

Download Ideal Coordinates CCD File 
B [auth A]N-{(3S,4S)-1-[(4S)-imidazo[1,5-a]pyridine-8-carbonyl]-4-phenylpiperidin-3-yl}-1H-pyrrole-2-carboxamide
C24 H23 N5 O2
HKQMQULFONPPAN-GHTZIAJQSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free:  0.251 (Depositor), 0.239 (DCC) 
  • R-Value Work:  0.225 (Depositor), 0.214 (DCC) 
Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 97.111α = 90
b = 81.942β = 117.11
c = 54.831γ = 90
Software Package:
Software NamePurpose
PRIME-Xrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data

  • Released Date: 2025-09-10 
  • Deposition Author(s): Bell, J.A.

Funding OrganizationLocationGrant Number
Not funded--

Revision History  (Full details and data files)

  • Version 1.0: 2025-09-10
    Type: Initial release
  • Version 1.1: 2025-10-08
    Changes: Derived calculations
  • Version 1.2: 2025-10-22
    Changes: Database references