Experimental and in Silico Evidence Suggests Vaccines Are Unlikely to Be Affected by D614G Mutation in SARS-CoV-2 Spike Protein

Overview

Journal NPJ Vaccines

Date 2020 Oct 21

PMID 33083031

Citations 37

Authors

Alexander J McAuley

Michael J Kuiper

Peter A Durr

Matthew P Bruce

Jennifer Barr

Shawn Todd

Gough G Au

Kim Blasdell

Mary Tachedjian

Sue Lowther

Glenn A Marsh

Sarah Edwards

Timothy Poole

Rachel Layton

Sarah-Jane Riddell

Trevor W Drew

Julian D Druce

Trevor R F Smith

Kate E Broderick

S S Vasan

Affiliations

Soon will be listed here.

Abstract

The 'D614G' mutation (Aspartate-to-Glycine change at position 614) of the SARS-CoV-2 spike protein has been speculated to adversely affect the efficacy of most vaccines and countermeasures that target this glycoprotein, necessitating frequent vaccine matching. Virus neutralisation assays were performed using sera from ferrets which received two doses of the INO-4800 COVID-19 vaccine, and Australian virus isolates (VIC01, SA01 and VIC31) which either possess or lack this mutation but are otherwise comparable. Through this approach, supported by biomolecular modelling of this mutation and the commonly-associated P314L mutation in the RNA-dependent RNA polymerase, we have shown that there is no experimental evidence to support this speculation. We additionally demonstrate that the putative elastase cleavage site introduced by the D614G mutation is unlikely to be accessible to proteases.

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