Protein function is dynamically controlled by post-translation events. A connmon regulatory mechanism is the phosphorylation and subsequent conformational rearrangement of target proteins. Viral proteins are often controlled by the same pathways that target proteins encoded by the host. The replication cycle of influenza A virus is influenced by host proteins and provides a unique system in which to study these processes. A major target of regulation is the influenza virus replication machinery containing viral RNA, nucleoprotein (NP), and the trimeric polymerase composed ofthe proteins PB1, PB2, and PA. The replication machinery controls the ordered transition from gene expression to genome replication that is essential for a productive infection. In addition, the viral polymerase is a key determinant in the host range of influenza virus and restricts the transmission of influenza virus from avian to human populations. The processes controlling the replication machinery and the interplay between the polymerase and the host are poorly understood. We propose an integrative approach using biochemical, genetic, and structural studies to determine the host proteins and molecular mechanisms that regulate the influenza replication machinery. Specifically, Aim 1 will identify sites of phosphorylation within viral proteins and examine the functional consequences of phosphorylation on virus replication and the determination of host range.
Aim 2 will build on recent genetic mapping of interactions to produce high-resolution crystal structures that characterize in detail the protein interfaces of the replication complex. Finally, Aim 3 will exploit loss-of-function screens to identify cellular proteins that regulate the influenza polymerase and control transmission of influenza from birds to humans. These studies will provide crucial insight into the viral and host factors controlling influenza replication and will provide the foundation for rational strategies to treat and prevent future influenza outbreaks in humans.
The influenza virus replication machinery is a key player in establishing infection and determining its pathogenicity. These studies will provide insight into the regulation ofthe influenza replication machinery, how it cpntrols transmission of influenza virus from birds to humans, and may ultimately identify new targets for therapeutic intervention.
|Karlsson, Erik A; Meliopoulos, Victoria A; Tran, Vy et al. (2018) Measuring Influenza Virus Infection Using Bioluminescent Reporter Viruses for In Vivo Imaging and In Vitro Replication Assays. Methods Mol Biol 1836:431-459|
|Mondal, Arindam; Dawson, Anthony R; Potts, Gregory K et al. (2017) Influenza virus recruits host protein kinase C to control assembly and activity of its replication machinery. Elife 6:|
|Mehle, Andrew (2016) The Avian Influenza Virus Polymerase Brings ANP32A Home to Roost. Cell Host Microbe 19:137-8|
|Kirui, James; Mondal, Arindam; Mehle, Andrew (2016) Ubiquitination up-regulates influenza virus polymerase function. J Virol :|
|Tran, Vy; Poole, Daniel S; Jeffery, Justin J et al. (2015) Multi-Modal Imaging with a Toolbox of Influenza A Reporter Viruses. Viruses 7:5319-27|
|Mehle, Andrew (2015) Fiat Luc: Bioluminescence Imaging Reveals In Vivo Viral Replication Dynamics. PLoS Pathog 11:e1005081|
|Mondal, Arindam; Potts, Gregory K; Dawson, Anthony R et al. (2015) Phosphorylation at the homotypic interface regulates nucleoprotein oligomerization and assembly of the influenza virus replication machinery. PLoS Pathog 11:e1004826|
|Poole, Daniel S; Yú, Shu?qìng; Caì, Yíngyún et al. (2014) Influenza A virus polymerase is a site for adaptive changes during experimental evolution in bat cells. J Virol 88:12572-85|
|Mehle, Andrew (2014) Unusual influenza A viruses in bats. Viruses 6:3438-49|
|Kirui, James; Bucci, Michael D; Poole, Daniel S et al. (2014) Conserved features of the PB2 627 domain impact influenza virus polymerase function and replication. J Virol 88:5977-86|
Showing the most recent 10 out of 13 publications