Profiling Kinase Activity during Hepatitis C Virus Replication Using a Wortmannin Probe.
To complete its life cycle, the hepatitis C virus (HCV) induces changes to numerous aspects of its host cell. As kinases act as regulators of many pathways utilized by HCV, they are likely enzyme targets for virally induced inhibition or activation. Herein, we used activity-based protein profiling (ABPP), which allows for the identification of active enzymes in complex protein samples and the quantification of their activity, to identify kinases that displayed differential activity in HCV-expressing cells. We utilized an ABPP probe, wortmannin-yne, based on the kinase inhibitor wortmannin, which contains a pendant alkyne group for bioconjugation using bioorthogonal chemistry. We observed changes in the activity of kinases involved in the mitogen-activated protein kinase pathway, apoptosis pathways, and cell cycle control. These results establish changes to the active kinome, as reported by wortmannin-yne, in the proteome of human hepatoma cells actively replicating HCV. The observed changes include kinase activity that affect viral entry, replication, assembly, and secretion, implying that HCV is regulating the pathways that it uses for its life cycle through modulation of the active kinome.
Life Sciences Division, National Research Council of Canada , 100 Sussex Drive, Ottawa, Canada.
Geneviève F
GF
Desrochers
Life Sciences Division, National Research Council of Canada , 100 Sussex Drive, Ottawa, Canada.
Allison R
AR
Sherratt
Life Sciences Division, National Research Council of Canada , 100 Sussex Drive, Ottawa, Canada.
David R
DR
Blais
Life Sciences Division, National Research Council of Canada , 100 Sussex Drive, Ottawa, Canada.
Neda
N
Nasheri
Zhibin
Z
Ning
Daniel
D
Figeys
Natalie K
NK
Goto
Life Sciences Division, National Research Council of Canada , 100 Sussex Drive, Ottawa, Canada.
John Paul
JP
Pezacki
MAPK pathway; activity-based protein profiling; hepatitis C; host−virus interactions; kinase probes; wortmannin