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Cross-regulation of viral kinases with cyclin A secures shutoff of host DNA synthesis

Item Type:Preprint
Title:Cross-regulation of viral kinases with cyclin A secures shutoff of host DNA synthesis
Creators Name:Bogdanow, B. and Schmidt, M. and Weisbach, H. and Gruska, I. and Vetter, B. and Imami, K. and Ostermann, E. and Brune, W. and Selbach, M. and Hagemeier, C. and Wiebusch, L.
Abstract:Herpesviruses encode conserved protein kinases to stimulate phosphorylation-sensitive processes during infection. How these kinases bind to cellular factors and how this impacts their regulatory functions is poorly understood. Here, we use quantitative proteomics to determine cellular interaction partners of human herpesvirus (HHV) kinases. We find that these kinases can target key regulators of transcription and replication. The interaction with Cyclin A and associated factors is identified as a specific signature of β-herpesvirus kinases. Cyclin A is recruited via RXL-motifs that overlap with nuclear localization signals (NLS) and locate in the non-catalytic N-terminal regions. This architecture is conserved for viral kinases of HHV6, HHV7 and rodent CMVs. Docking to Cyclin A competes with NLS function, enabling dynamic changes in kinase localization and substrate phosphorylation. The viral kinase redirects Cyclin A to the cytosol, which is essential for the inhibition of cellular DNA replication during infection. Our data highlight a fine-tuned and physiologically important interplay between a cellular cyclin and viral kinases.
Publisher:Cold Spring Harbor Laboratory Press
Article Number:856435
Date:26 November 2019
Official Publication:https://doi.org/10.1101/856435
Related to:
https://edoc.mdc-berlin.de/19410/Final version

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