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Free fatty acid binding pocket in the locked structure of SARS-CoV-2 spike protein #MMPMID32958580
Science 2020[Nov]; 370 (6517): 725-730 PMID32958580show ga
Coronavirus disease 2019 (COVID-19), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), represents a global crisis. Key to SARS-CoV-2 therapeutic development is unraveling the mechanisms that drive high infectivity, broad tissue tropism, and severe pathology. Our 2.85-angstrom cryo-electron microscopy structure of SARS-CoV-2 spike (S) glycoprotein reveals that the receptor binding domains tightly bind the essential free fatty acid linoleic acid (LA) in three composite binding pockets. A similar pocket also appears to be present in the highly pathogenic severe acute respiratory syndrome coronavirus (SARS-CoV) and Middle East respiratory syndrome coronavirus (MERS-CoV). LA binding stabilizes a locked S conformation, resulting in reduced angiotensin-converting enzyme 2 (ACE2) interaction in vitro. In human cells, LA supplementation synergizes with the COVID-19 drug remdesivir, suppressing SARS-CoV-2 replication. Our structure directly links LA and S, setting the stage for intervention strategies that target LA binding by SARS-CoV-2.
|Amino Acid Sequence[MESH]
|Angiotensin-Converting Enzyme 2[MESH]
|Animals[MESH]
|Betacoronavirus[MESH]
|Binding Sites[MESH]
|Chlorocebus aethiops[MESH]
|Cryoelectron Microscopy[MESH]
|Humans[MESH]
|Linoleic Acid/*metabolism[MESH]
|Middle East Respiratory Syndrome Coronavirus[MESH]