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The D614G Mutation Enhances the Lysosomal Trafficking of SARS-CoV-2 Spike.

ABSTRACT: The spike D614G mutation increases SARS-CoV-2 infectivity, viral load, and transmission but the molecular mechanism underlying these effects remains unclear. We report here that spike is trafficked to lysosomes and that the D614G mutation enhances the lysosomal sorting of spike and the lysosomal accumulation of spike-positive punctae in SARS-CoV-2-infected cells. Spike trafficking to lysosomes is an endocytosis-independent, V-ATPase-dependent process, and spike-containing lysosomes drive lysosome clustering but display poor lysotracker labeling and reduced uptake of endocytosed materials. These results are consistent with a lysosomal pathway of coronavirus biogenesis and raise the possibility that a common mechanism may underly the D614G mutation's effects on spike protein trafficking in infected cells and the accelerated entry of SARS-CoV-2 into uninfected cells.

SUBMITTER: Guo C

PROVIDER: S-EPMC7743070 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Spike mutation D614G alters SARS-CoV-2 fitness.

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Project description: Not available

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D614G mutation in the SARS-CoV-2 spike protein enhances viral fitness by desensitizing it to temperature-dependent denaturation.

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