8HET

Crystal structure of CTSL in complex with E64d


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 

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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

Structure-based discovery of dual pathway inhibitors for SARS-CoV-2 entry.

Wang, H.Yang, Q.Liu, X.Xu, Z.Shao, M.Li, D.Duan, Y.Tang, J.Yu, X.Zhang, Y.Hao, A.Wang, Y.Chen, J.Zhu, C.Guddat, L.Chen, H.Zhang, L.Chen, X.Jiang, B.Sun, L.Rao, Z.Yang, H.

(2023) Nat Commun 14: 7574-7574

  • DOI: https://doi.org/10.1038/s41467-023-42527-5
  • Primary Citation of Related Structures:  
    7XYD, 7Y0E, 7Y0F, 8HD8, 8HE9, 8HEI, 8HEN, 8HET, 8HFV

  • PubMed Abstract: 

    Since 2019, SARS-CoV-2 has evolved rapidly and gained resistance to multiple therapeutics targeting the virus. Development of host-directed antivirals offers broad-spectrum intervention against different variants of concern. Host proteases, TMPRSS2 and CTSL/CTSB cleave the SARS-CoV-2 spike to play a crucial role in the two alternative pathways of viral entry and are characterized as promising pharmacological targets. Here, we identify compounds that show potent inhibition of these proteases and determine their complex structures with their respective targets. Furthermore, we show that applying inhibitors simultaneously that block both entry pathways has a synergistic antiviral effect. Notably, we devise a bispecific compound, 212-148, exhibiting the dual-inhibition ability of both TMPRSS2 and CTSL/CTSB, and demonstrate antiviral activity against various SARS-CoV-2 variants with different viral entry profiles. Our findings offer an alternative approach for the discovery of SARS-CoV-2 antivirals, as well as application for broad-spectrum treatment of viral pathogenic infections with similar entry pathways.


  • Organizational Affiliation

    Shanghai Institute for Advanced Immunochemical Studies and School of Life Science and Technology, ShanghaiTech University, Shanghai, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Procathepsin L220Homo sapiensMutation(s): 0 
Gene Names: CTSL
EC: 3.4.22.15
UniProt & NIH Common Fund Data Resources
Find proteins for P07711 (Homo sapiens)
Explore P07711 
Go to UniProtKB:  P07711
PHAROS:  P07711
GTEx:  ENSG00000135047 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP07711
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
E6D (Subject of Investigation/LOI)
Query on E6D

Download Ideal Coordinates CCD File 
B [auth A]ethyl (3S)-3-hydroxy-4-({(2S)-4-methyl-1-[(3-methylbutyl)amino]-1-oxopentan-2-yl}amino)-4-oxobutanoate
C17 H32 N2 O5
FGRTVYZNNRCSAS-KBPBESRZSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.542α = 90
b = 47.705β = 90
c = 100.362γ = 90
Software Package:
Software NamePurpose
XDSdata scaling
PHENIXrefinement
XDSdata reduction
PHENIXphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China92169109

Revision History  (Full details and data files)

  • Version 1.0: 2023-12-13
    Type: Initial release
  • Version 1.1: 2024-06-19
    Changes: Database references