NDLI: Analysis of Herpes Simplex Virion Tegument ICP4 Derived from Infected Cells and ICP4-Expressing Cells

Content Provider	PubMed Central
Author	Pritchard, Suzanne M. Cunha, Cristina W. Nicola, Anthony V.
Editor	Mossman, Karen L.
Copyright Year	2013
Abstract	ICP4 is the major transcriptional regulatory protein of herpes simplex virus (HSV). It is expressed in infected cells with immediate early kinetics and is essential for viral growth. ICP4 is also a structural component of the virion tegument layer. Herpesviral tegument proteins exert regulatory functions important for takeover of the host cell. Tegument ICP4 has not been well characterized. We examined the ICP4 present in HSV-1 virions that were either derived from wild type infected cells or from ICP4-expressing (E5) cells infected with ICP4 deletion virus d120. Limited proteolysis demonstrated that virion-associated ICP4 from particles derived from E5 cells was indeed an internal component of the virion. A similar subset of virion structural proteins was detected in viral particles regardless of the cellular origin of ICP4. Genotypically ICP4-negative virions complemented with tegument ICP4 entered cells via a proteasome-dependent, pH-dependent pathway similar to wild type virions. In infected cells, ICP4 was distributed predominantly in intranuclear replication compartments regardless of whether it was expressed from a transgene or from the HSV genome.
Related Links	http://dx.doi.org/10.1371/journal.pone.0070889
Starting Page	70889
File Format	PDF
ISSN	19326203
e-ISSN	19326203
Journal	PLoS ONE
Issue Number	8
Volume Number	8
Language	English
Publisher	Public Library of Science
Publisher Date	2013-08-01
Access Restriction	Open
Rights Holder	Public Library of Science
Subject Keyword	Biochemistry, Genetics and Molecular Biology(all) Agricultural and Biological Sciences(all) Medicine(all) Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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