Multiple Pathways To Avoid Beta Interferon Sensitivity of HIV-1 by Mutations in Capsid
Multiple Pathways To Avoid Beta Interferon Sensitivity of HIV-1 by Mutations in Capsid
HIV-1 infection causes robust innate immune activation in virus-infected patients. This immune activation is characterized by elevated levels of type I interferons (IFNs), which can block HIV-1 replication. Recent studies suggest that the viral capsid protein (CA) is a determinant for the sensitivity of HIV-1 to IFN-mediated restriction. Specifically, it was reported that the loss of CA interactions with CPSF6 or CypA leads to higher IFN sensitivity. However, the molecular mechanism of CA adaptation to IFN sensitivity is largely unknown. Here, we experimentally evolved an IFN-β-hypersensitive CA mutant which showed decreased binding to CPSF6 and CypA in IFN-β-treated cells. The CA mutations that emerged from this adaptation indeed conferred IFN-β resistance. Our genetic assays suggest a limited contribution of known host factors to IFN-β resistance. Strikingly, one of these mutations accelerated the kinetics of reverse transcription and uncoating. Our findings suggest that HIV-1 selected multiple, known host factor-independent pathways to avoid IFN-β-mediated restriction.
- Northwestern University United States
- Nagoya University Japan
- Osaka University Japan
- Aaron Diamond AIDS Research Center United States
Myxovirus Resistance Proteins, mRNA Cleavage and Polyadenylation Factors, THP-1 Cells, HIV Infections, Interferon-beta, Reverse Transcription, Virus Replication, Virus-Cell Interactions, Capsid, HEK293 Cells, Host-Pathogen Interactions, Mutation, HIV-1, Humans, Capsid Proteins, Cyclophilin A, HeLa Cells
Myxovirus Resistance Proteins, mRNA Cleavage and Polyadenylation Factors, THP-1 Cells, HIV Infections, Interferon-beta, Reverse Transcription, Virus Replication, Virus-Cell Interactions, Capsid, HEK293 Cells, Host-Pathogen Interactions, Mutation, HIV-1, Humans, Capsid Proteins, Cyclophilin A, HeLa Cells
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