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Journal of Virology, December 2003, p. 13418-13424, Vol. 77, No. 24
0022-538X/03/$08.00+0 DOI: 10.1128/JVI.77.24.13418-13424.2003
Copyright © 2003, American
Society for
Microbiology. All Rights Reserved.
Expression of Unmodified Hepatitis C Virus Envelope Glycoprotein-Coding Sequences Leads to Cryptic Intron Excision and Cell Surface Expression of E1/E2 Heterodimers Comprising Full-Length and Partially Deleted E1
Julie Dumonceaux ,1,
,
Emmanuel G. Cormier,1,2,
Francis Kajumo,1,2 Gerald P. Donovan,2 Jayanta Roy-Chowdhury,1 Ira J. Fox,3 Jason P. Gardner,2 and Tatjana Dragic1*
Albert
Einstein College of Medicine, Bronx, New York
10461,1
Progenics Pharmaceuticals,
Inc., Tarrytown, New York 10591,2
Department of Surgery,
Nebraska Medical Center, Omaha, Nebraska
981983
Received 22 July 2003/
Accepted 12 September 2003
Hepatitis
C virus (HCV) is a positive-strand RNA virus that replicates
exclusively in the cytoplasm of infected cells. The viral envelope
glycoproteins, E1 and E2, appear to be retained in the endoplasmic
reticulum, where viral budding is thought to occur. Surprisingly, we
found that the expression system used to generate HCV envelope
glycoproteins influences their subcellular localization and processing.
These findings have important implications for optimizing novel HCV
fusion and entry assays as well as for budding and virus particle
formation.
* Corresponding
author. Mailing address: Albert Einstein College of Medicine, 1300
Morris Park Ave., Bronx, NY 10461. Phone: (718) 430-3282. Fax: (718)
430-8711. E-mail:
tdragic{at}aecom.yu.edu.
J.D.
and E.G.C. contributed equally to this
work.
Present address:
Généthon, Groupe Cellules Souches, 91002 Evry Cedex,
France.
Journal of Virology, December 2003, p. 13418-13424, Vol. 77, No. 24
0022-538X/03/$08.00+0 DOI: 10.1128/JVI.77.24.13418-13424.2003
Copyright © 2003, American
Society for
Microbiology. All Rights Reserved.
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