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Development of the Safe and Broad‐Spectrum Aldehyde and Ketoamide Mpro inhibitors Derived from the Constrained α, γ‐AA Peptide Scaffold

Journal Article · · Chemistry - A European Journal
 [1];  [2];  [3];  [1];  [1];  [1];  [3];  [4];  [1]
  1. Department of Chemistry University of South Florida 4202 E. Fowler Ave. Tampa FL 33620 USA
  2. Department of Pharmacology and Toxicology College of Pharmacy University of Arizona Tucson Arizona 85721 USA
  3. Department of Molecular Medicine Morsani College of Medicine University of South Florida 4202 E. Fowler Ave. Tampa FL 33620 USA
  4. Department of Pharmacology and Toxicology College of Pharmacy University of Arizona Tucson Arizona 85721 USA; Department of Medicinal Chemistry Ernest Mario School of Pharmacy, Rutgers University of New Jersey Piscataway NJ USA
Abstract

SARS‐CoV‐2 is still wreaking havoc all over the world with surging morbidity and high mortality. The main protease (Mpro) is essential in the replication of SARS‐CoV‐2, enabling itself an active target for antiviral development. Herein, we reported the design and synthesis of a new class of peptidomimetics‐constrained α, γ‐AA peptides, based on which a series of aldehyde and ketoamide inhibitors of the Mproof SARS‐CoV‐2 were prepared. The lead compounds showed excellent inhibitory activity in the FRET‐based Mproenzymatic assay not only for the Mproof SARS‐CoV‐2 but also for SARS‐CoV and MERS‐CoV, along with HCoVs like HCoV‐OC43, HCoV‐229E, HCoV‐NL63 and HKU1. The X‐ray crystallographic results demonstrated that our compounds form a covalent bond with the catalytic Cys145. They also demonstrated effective antiviral activity against live SARS‐CoV‐2. Overall, the results suggest that α, γ‐AA peptide could be a promising molecular scaffold in designing novel Mproinhibitors of SARS‐CoV‐2 and other coronaviruses.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC02-06CH11357
OSTI ID:
2423380
Journal Information:
Chemistry - A European Journal, Journal Name: Chemistry - A European Journal Journal Issue: 35 Vol. 29; ISSN 0947-6539
Publisher:
Wiley
Country of Publication:
United States
Language:
English

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