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A collaboration solves the herpes virus protein structure providing new drug therapy directions
Date:7/26/2010

PHILADELPHIA - The mechanism by which a herpes virus invades cells has remained a mystery to scientists, but now research from Tufts University and the University of Pennsylvania reveals the unusual structure of a key member of the protein complex that allows a herpes virus to invade cells.

The new map details an essential piece of the herpes virus "cell-entry machinery," providing scientists with a new target for antiviral drugs.

The research was published online in the journal Nature Structural & Molecular Biology.

Researchers at Tufts and Penn used X-ray crystallography along with cell microscopy techniques to study the structure and function of the cell-entry protein fusion events carried out by HSV-2. The research has resulted in a map of an important protein complex required to trigger herpes virus infection, setting the stage for new therapeutics that may prevent the virus's access to cells.

Most viruses need cell-entry proteins called fusogens in order to invade cells. Scientists have known that the herpes virus fusogen does not act alone, requiring a complex of two other viral cell-entry proteins. In this study, researchers determined the structure of this key protein complex and realized it did not resemble the structure of other known fusogens.

"This unexpected result leads us to believe that this protein complex is not a fusogen itself but that it regulates the fusogen," said senior author Ekaterina Heldwein, assistant professor of molecular and microbiology at Tufts University School of Medicine. "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."

"We hope that determining the structure of this essential piece of the herpes virus cell-entry machinery will help us answer some of the many questions about how herpes virus initiate
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Contact: Jordan Reese
jreese@upenn.edu
215-573-6604
University of Pennsylvania
Source:Eurekalert  

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