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Publication Abstract from PubMed

Enveloped viruses depend on the host endoplasmic reticulum (ER) quality control (QC) machinery for proper glycoprotein folding. The endoplasmic reticulum quality control (ERQC) enzyme alpha-glucosidase I (alpha-GluI) is an attractive target for developing broad-spectrum antivirals. We synthesized 28 inhibitors designed to interact with all four subsites of the alpha-GluI active site. These inhibitors are derivatives of the iminosugars 1-deoxynojirimycin (1-DNJ) and valiolamine. Crystal structures of ER alpha-GluI bound to 25 1-DNJ and three valiolamine derivatives revealed the basis for inhibitory potency. We established the structure-activity relationship (SAR) and used the Site Identification by Ligand Competitive Saturation (SILCS) method to develop a model for predicting alpha-GluI inhibition. We screened the compounds against SARS-CoV-2 in vitro to identify those with greater antiviral activity than the benchmark alpha-glucosidase inhibitor UV-4. These host-targeting compounds are candidates for investigation in animal models of SARS-CoV-2 and for testing against other viruses that rely on ERQC for correct glycoprotein folding.

Structure-Based Design of Potent Iminosugar Inhibitors of Endoplasmic Reticulum alpha-Glucosidase I with Anti-SARS-CoV-2 Activity.,Karade SS, Franco EJ, Rojas AC, Hanrahan KC, Kolesnikov A, Yu W, MacKerell AD Jr, Hill DC, Weber DJ, Brown AN, Treston AM, Mariuzza RA J Med Chem. 2023 Feb 10. doi: 10.1021/acs.jmedchem.2c01750. PMID:36762932^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.