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Immunodominant sites on spike protein of SARS coronavirus identified.

Vaccine Weekly

| December 01, 2004 | COPYRIGHT 2004 NewsRX. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

2004 DEC 1 - (NewsRx.com & NewsRx.net) -- Scientists have identified immunodominant sites on the spike protein of severe acute respiratory syndrome (SARS) coronavirus.

"The spike (S) protein of severe acute respiratory syndrome (SARS) coronavirus (SARS-CoV) is not only responsible for receptor binding and virus fusion, but also a major antigen among the SARS-CoV proteins that induces protective antibody responses. In this study, we showed that the S protein of SARS-CoV is highly immunogenic during infection and immunizations, and contains five linear immunodominant sites (sites I to V) as determined by Pepscan analysis with a set of synthetic peptides overlapping the entire S protein sequence against the convalescent sera from SARS patients and antisera from small animals immunized with inactivated SARS-CoV," investigators in the United States and China report.

"Site IV located in the middle region of the S protein (residues 528-635) is a major immunodominant epitope," said Yuxian He at the New York Blood Center in the U.S. and collaborators in the U.S. and China. "The synthetic peptide S[subscript]603-634, which overlaps the site IV sequence reacted with all the convalescent sera from 42 SARS patient, but none of the 30 serum samples from ...

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