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Front Cell Infect Microbiol. 2017 Feb 7;7:27. doi: 10.3389/fcimb.2017.00027. eCollection 2017.
HA Triggers the Switch from MEK1 SUMOylation to Phosphorylation of the ERK Pathway in Influenza A Virus-Infected Cells and Facilitates Its Infection.
Wang C1, Liu H1, Luo J1, Chen L1, Li M1, Su W1, Zhao N1, Liu S2, Xie L3, Jia Y4, Ding H3, Wan X5, He H1.
Author information
Abstract
Several post-translational modifications in host cells are hijacked by pathogens to facilitate their propagation. A number of components of the influenza virus have been reported to be modified by small ubiquitin-like modifier (SUMO) proteins during infection. We hypothesized that the MAPK/ERK pathway could be modified by SUMO1 because the SUMOylation of MEK1 was quickly eliminated after influenza A virus infection. We identified host cell MEK1 as a target of SUMO1 through LC/MS/MS, and enhanced MEK1 SUMOylation inhibited the infection of the virus, while inhibition of host cell MEK1 SUMOylation facilitated virus propagation. Further investigation demonstrated that the MAPK/ERK pathway is downregulated by MEK1 SUMOylation, which is inhibited by influenza virus infection. Furthermore, membrane accumulation of hemagglutinin promoted MEK1 phosphorylation and gradually abrogated the MEK1 SUMOylation. Taken together, we report a possible mechanism in which HA may trigger the ERK pathway in influenza A virus-infected cells as the switch from MEK1 SUMOylation to phosphorylation, facilitating virus infection.
KEYWORDS:
MEK1; SUMOylation; hemagglutinin; influenza A virus; switch
PMID: 28224114 PMCID: PMC5293797 DOI: 10.3389/fcimb.2017.00027
[PubMed - in process] Free full text
HA Triggers the Switch from MEK1 SUMOylation to Phosphorylation of the ERK Pathway in Influenza A Virus-Infected Cells and Facilitates Its Infection.
Wang C1, Liu H1, Luo J1, Chen L1, Li M1, Su W1, Zhao N1, Liu S2, Xie L3, Jia Y4, Ding H3, Wan X5, He H1.
Author information
Abstract
Several post-translational modifications in host cells are hijacked by pathogens to facilitate their propagation. A number of components of the influenza virus have been reported to be modified by small ubiquitin-like modifier (SUMO) proteins during infection. We hypothesized that the MAPK/ERK pathway could be modified by SUMO1 because the SUMOylation of MEK1 was quickly eliminated after influenza A virus infection. We identified host cell MEK1 as a target of SUMO1 through LC/MS/MS, and enhanced MEK1 SUMOylation inhibited the infection of the virus, while inhibition of host cell MEK1 SUMOylation facilitated virus propagation. Further investigation demonstrated that the MAPK/ERK pathway is downregulated by MEK1 SUMOylation, which is inhibited by influenza virus infection. Furthermore, membrane accumulation of hemagglutinin promoted MEK1 phosphorylation and gradually abrogated the MEK1 SUMOylation. Taken together, we report a possible mechanism in which HA may trigger the ERK pathway in influenza A virus-infected cells as the switch from MEK1 SUMOylation to phosphorylation, facilitating virus infection.
KEYWORDS:
MEK1; SUMOylation; hemagglutinin; influenza A virus; switch
PMID: 28224114 PMCID: PMC5293797 DOI: 10.3389/fcimb.2017.00027
[PubMed - in process] Free full text