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Map of herpes virus protein suggests a new drug therapy
Date:7/6/2010

BOSTON (July 6, 2010) The mechanism by which a herpes virus invades cells has remained a mystery to scientists seeking to thwart this family of viruses. New research funded by the National Institutes of Health and published online in advance of print in Nature Structural & Molecular Biology reveals the unusual structure of the protein complex that allows a herpes virus to invade cells. This detailed map of a key piece of the herpes virus "cell-entry machinery" gives scientists a new target for antiviral drugs.

"Most viruses need cell-entry proteins called fusogens in order to invade cells. We have known that the herpes virus fusogen does not act alone and that a complex of two other viral cell-entry proteins is always required. We expected that this complex was also a fusogen, but after determining the structure of this key protein complex, we found that it does not resemble other known fusogens," said senior author Ekaterina Heldwein, PhD, assistant professor in the molecular biology and microbiology department at Tufts University School of Medicine.

"This unexpected result leads us to believe that this protein complex is not a fusogen itself but that it regulates the fusogen. We also found that certain antibodies interfere with the ability of this protein complex to bind to the fusogen, evidence that antiviral drugs that target this interaction could prevent viral infection," Heldwein continued. Heldwein is also a member of the biochemistry and molecular microbiology program faculties at the Sackler School of Graduate Biomedical Sciences at Tufts.

"Katya Heldwein's work has resulted in a map of the protein complex needed to trigger herpes virus infection. The NIH Director's New Innovator Awards are designed to support such breakthroughs. This research not only adds to what we know about how herpes viruses infect mammalian cells, but also sets the stage for new therapeutics that restrict herpes virus's access to the ce
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Contact: Siobhan Gallagher
617-636-6586
Tufts University, Health Sciences
Source:Eurekalert  

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