Author for correspondence: Jürgen Müllberg. Present address: Department of Medicine, Section Pathophysiology, Obere Zahlbacher Straße 63, 55101 Mainz, Germany. Fax +49 6131 173364. e-mail mullberg@mail.uni-mainz.de.
A 45 kDa glycoprotein was purified from the culture media of human cytomegalovirus (HCMV)-infected fibroblasts. N-terminal sequencing revealed that the protein, R27080, is the translation product of the R27080 open reading frame of HCMV. R27080 is highly glycosylated and contains no cysteine or methionine residues. Proteolytic cleavage of R27080 by a furin-like enzyme was analysed in transfected COS-7 cells. R27080 is the first identified viral protein secreted from HCMV-infected cells.
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