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COVID19-NMR

COVID19-NMR

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Publications

DOI

Nature Structural & Molecular Biology (2020) 27:1202–1208

Structure and drug binding of the SARS-CoV-2 envelope protein transmembrane domain in lipid bilayers

V. S. Mandala, M. J. McKay, A. A. Shcherbakov, A. J. Dregni, A. Kolocouris & M. Hong

An essential protein of the SARS-CoV-2 virus, the envelope protein E, forms a homopentameric cation channel that is important for virus pathogenicity. Here we report a 2.1-Å structure and the drug-binding site of E’s transmembrane domain (ETM), determined using solid-state NMR spectroscopy. In lipid bilayers that mimic the endoplasmic reticulum–Golgi intermediate compartment (ERGIC) membrane, ETM forms a five-helix bundle surrounding a narrow pore. The protein deviates from the ideal α-helical geometry due to three phenylalanine residues, which stack within each helix and between helices. Together with valine and leucine interdigitation, these cause a dehydrated pore compared with the viroporins of influenza viruses and HIV. Hexamethylene amiloride binds the polar amino-terminal lumen, whereas acidic pH affects the carboxy-terminal conformation. Thus, the N- and C-terminal halves of this bipartite channel may interact with other viral and host proteins semi-independently. The structure sets the stage for designing E inhibitors as antiviral drugs.

Funded by


Goethe Corona Fonds

DFG

Volkswagen Stiftung

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Coordination

Prof. Dr. Harald Schwalbe (Coordinator)
Institut für Organische Chemie und Chemische Biologie
Zentrum für Biomolekulare Magnetische Resonanz

Johann Wolfgang Goethe-Universität
N160-3.13
Max-von-Laue-Strasse 7
D-60438 Frankfurt am Main

Contact us

++49 69 798 29737
schwalbe@nmr.uni-frankfurt.de

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