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Study reveals the proteins expressed by human cytomegalovirus
Date:11/22/2012

This release is available in Arabic.

New findings reveal the surprisingly complex protein-coding capacity of the human cytomegalovirus, or HCMV, and provide the first steps toward understanding how the virus manipulates human cells during infection. The genome of the HCMV was first sequenced over 20 years ago, but researchers have now investigated the proteomethe complete set of expressed proteinsof this common pathogen as well.

HCMV is an incredibly successful virus, and it infects most humans on the planet. Birth defects and disease, however, are only known to occur in newborn infants and adults with compromised immune systems, respectively. But, the pathogen also has one of the largest viral genomes on record, with a massive 240,000 base pairs of DNA. (For comparison, the genome of the poliovirus only contains about 7,500 base pairs.)

Noam Stern-Ginossar from the University of California in San Francisco, along with colleagues from the United States and Germany, used a combination of techniques, including ribosome profiling and mass spectrometry, to study HCMV's proteome. The method could be used to investigate proteins produced by other viruses as well, they say.

The researchers' findings appear in the 23 November issue of the journal Science, which is published by AAAS, the nonprofit science society.

"The genome of a virus is just a starting point," explained Jonathan Weissman from the University of California, a co-author of the Science report. "Understanding what proteins are encoded by that genome allows us to start thinking about what the virus does and how we can interfere with it Each of the proteins we've identified has the potential to tell us how this virus is manipulating its host cell."

Stern-Ginossar and the other researchers suspected that existing maps of HCMV's
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Contact: Natasha Pinol
npinol@aaas.org
202-326-6440
American Association for the Advancement of Science
Source:Eurekalert

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