Knowledge of SARS-CoV2 (SCoV2) human protein-protein interactions (PPIs), and host response to viral infection is key to designing new antivirals to thwart COVID-19. Yet, it remains unclear how ancestral and variants SCoV2 detected in many body parts or fluids remodel virus-host protein assemblies. Here, we performed >600 affinity-purifications by tagging and expressing 28 SCoV2 proteins, and spike protein from ancestral and four variants in eight cell lines, derived from five mammalian organs or biofluid, and identified human proteins associated with each viral protein by mass spectrometry (MS). The ensuing high-quality and previously unreported SCoV2-human PPIs were largely organ or variant-specific. Besides confirming these PPIs in COVID-19 patients saliva by MS-based co-fractionation, host PPIs were altered between variants and ancestral SCoV2. We show SCoV2 NSP3 papain-like protease is a secreted protein that binds with fibrinogen to promote abnormal blood clots, and with interferon-induced proteins to evade host innate immunity. Deep-learning aided design of peptide inhibitors impeded SCoV2 and variants replication in human liver cells, and restored PPI changes by the virus to healthy state. Our results unveil new mechanisms for human-ancestral or variants SCoV2 PPIs in various organs or biofluids, offering potential host therapeutic targets and SCoV2 inhibitors for antiviral development.
[doi:10.25345/C5CZ32H3Q]
[dataset license: CC0 1.0 Universal (CC0 1.0)]
Keywords: CF-MS ; Saliva ; Host-Viral PPI ; VoCs ; Spike variants ; DatasetType:Proteomics
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Principal Investigators: (in alphabetical order) |
Dr. Mohan Babu, Department of Biochemistry Room 232, Research and Innovation Centre University of Regina Regina, Saskatchewan S4S 0A2, Canada |
| Submitting User: | srphanse |
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