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J. Virol., May 1996, 2684-2690, Vol 70, No. 5
PL Ward, DE Barker and B Roizman
An open reading frame mapping antisense to the UL43 gene of herpes simplex
virus 1 encodes a protein with an apparent Mr of 38,000. The protein was
detected in wild-type-infected cells with rabbit monospecific polyclonal
antibody directed against a fusion protein containing all of the sequences
encoded by the open reading frame. The antibody did not react with mutants
from which the open reading frame was deleted. Expression of this gene,
designated UL43.5, was grossly decreased or abolished in infected cells
incubated in medium containing inhibitory concentrations of phosphonoacetic
acid, suggesting that it is regulated as a gamma gene. UL43.5 is
dispensable in cell culture. UL43.5 protein colocalized with the major
capsid protein (infected cell protein 5) and the capsid scaffolding
proteins (infected cell protein 35) in nuclear structures situated at the
periphery of the nucleus. The predicted amino acid sequence indicates that
the UL43.5 protein is a highly hydrophilic protein. The colocalization of
UL43.5 protein with capsid proteins in discrete nuclear structures suggests
that the former may be involved in assembly of viral particles in an
accessory role in cells in culture.
Copyright © 1996, American Society for Microbiology
A novel herpes simplex virus 1 gene, UL43.5, maps antisense to the UL43 gene and encodes a protein which colocalizes in nuclear structures with capsid proteins
Marjorie B. Kovler Viral Oncology Laboratories, University of Chicago, Illinois 60637, USA.
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