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J Virol, July 1998, p. 6056-6064, Vol. 72, No. 7
The Marjorie B. Kovler Viral Oncology
Laboratories, The University of Chicago, Chicago, Illinois
60637,1 and
Department of Experimental
Pathology, Section on Microbiology and Virology, University of
Bologna, 40126 Bologna, Italy2
Received 17 February 1998/Accepted 17 April 1998
An antibody made against the herpes simplex virus 1 US5
gene predicted to encode glycoprotein J was found to react strongly with two proteins, one with an apparent Mr of
23,000 and mapping in the S component and one with a herpes simplex
virus protein with an apparent Mr of 43,000. The antibody also reacted with herpes simplex virus type 2 proteins
forming several bands with apparent Mrs ranging
from 43,000 to 50,000. Mapping studies based on intertypic
recombinants, analyses of deletion mutants, and ultimately, reaction of
the antibody with a chimeric protein expressed by in-frame fusion of
the glutathione S-transferase gene to an open reading frame
antisense to the gene encoding glycoprotein B led to the definitive
identification of the new open reading frame, designated
UL27.5. Sequence analyses indicate the conservation of a
short amino acid sequence common to US5 and
UL27.5. The coding sequence of the herpes simplex virus
UL27.5 open reading frame is strongly homologous to the
sequence encoding the carboxyl terminus of the herpes simplex virus 2 UL27.5 sequence. However, both open reading frames could
encode proteins predicted to be significantly larger than the mature
UL27.5 proteins accumulating in the infected cells,
indicating that these are either processed posttranslationally or
synthesized from alternate, nonmethionine-initiating codons. The
UL27.5 gene expression is blocked by phosphonoacetate,
indicating that it is a
0022-538X/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
UL27.5 Is a Novel
2 Gene
Antisense to the Herpes Simplex Virus 1 Gene Encoding
Glycoprotein B
2 gene. The product accumulated
predominantly in the cytoplasm. UL27.5 is the third open
reading frame found to map totally antisense to another gene and
suggests that additional genes mapping antisense to known genes may
exist.
*
Corresponding author. Mailing address: The Marjorie B. Kovler Viral Oncology Laboratories, The University of Chicago, 910 E. 58th St., Chicago, IL 60637. Phone: (773) 702-1898. Fax: (773) 702-1631. E-mail: bernard{at}kovler.uchicago.edu.
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