Inhibition of protein kinase C phosphorylation of hepatitis B virus capsids inhibits virion formation and causes intracellular capsid accumulation
Capsids of hepatitis B virus and other hepadnaviruses contain a cellular protein kinase, which phosphorylates the capsid protein. Some phosphorylation sites are shown to be essential for distinct steps of viral replication as pregenome packaging or plus strand DNA synthesis. Although different prote...
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Published in | Cellular microbiology Vol. 12; no. 7; pp. 962 - 975 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Oxford, UK
Oxford, UK : Blackwell Publishing Ltd
01.07.2010
Blackwell Publishing Ltd Hindawi Limited Wiley |
Subjects | |
Online Access | Get full text |
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Summary: | Capsids of hepatitis B virus and other hepadnaviruses contain a cellular protein kinase, which phosphorylates the capsid protein. Some phosphorylation sites are shown to be essential for distinct steps of viral replication as pregenome packaging or plus strand DNA synthesis. Although different protein kinases have been reported to phosphorylate the capsid protein, varying experimental approaches do not allow direct comparison. Furthermore, the activity of a specific protein kinase has not yet been correlated to steps in the hepadnaviral life cycle. In this study we show that capsids from various sources encapsidate active protein kinase Cα, irrespective of hepatitis B virus genotype and host cell. Treatment of a virion expressing cell line with a pseudosubstrate inhibitor showed that inhibition of protein kinase C phosphorylation did not affect genome maturation but resulted in capsid accumulation and inhibited virion release to the medium. Our results imply that different protein kinases have distinct functions within the hepadnaviral life cycle. |
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Bibliography: | http://dx.doi.org/10.1111/j.1462-5822.2010.01444.x AiCuris GmbH & Co. KG, Friedrich‐Ebert‐Str. 475, D‐42117 Wuppertal, Germany. Second last author. Equal contribution. Present addresses: INSERM U897, Centre of Epidemiology and Biostatistics (ISPED), Bordeaux School of Public Health, 146 rue Leo Saignat, Université Bordeaux 2, F‐33076 Bordeaux, France ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1 |
ISSN: | 1462-5814 1462-5822 |
DOI: | 10.1111/j.1462-5822.2010.01444.x |