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The role of protein kinase activity expressed by the UL13 gene of herpes simplex virus 1: the activity is not essential for optimal expression of UL41 and ICP0.

Authors
  • Tanaka, Michiko
  • Nishiyama, Yukihiro
  • Sata, Tetsutaro
  • Kawaguchi, Yasushi
Type
Published Article
Journal
Virology
Publication Date
Oct 25, 2005
Volume
341
Issue
2
Pages
301–312
Identifiers
PMID: 16095647
Source
Medline
License
Unknown

Abstract

Herpes simplex virus 1 (HSV-1) UL13 is a viral protein kinase that is packaged into virions and regulates optimal expression of ICP0 and a subset of late (gamma) proteins, including UL41 in infected cells. In the present study, we investigated the role(s) of the protein kinase activity of UL13 in viral replication using a recombinant virus expressing enzymatically inactive UL13 after an amino acid substitution in the invariant lysine of UL13. The recombinant virus carrying this mutation formed smaller plaques yielded 10-fold less progeny than wild-type virus but could not be differentiated from wild-type virus with respect to accumulation of UL41 and ICP0 in infected cells. These results indicate that the protein kinase activity of UL13 plays a role in viral replication in cell culture, but the activity is not essential for the optimal expression of UL41 and ICP0.

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