Characterization of EBV gB indicates properties of both class I and class II viral fusion proteins
- Department of Biochemistry, Molecular Biology, Cell Biology, Northwestern University, Evanston, IL 60208 (United States)
- Department of Microbiology and Immunology, The Feinberg School of Medicine, Northwestern University, Chicago, IL 60611 (United States)
To gain insight into Epstein-Barr virus (EBV) glycoprotein B (gB), recombinant, secreted variants were generated. The role of putative transmembrane regions, the proteolytic processing and the oligomerization state of the gB variants were investigated. Constructs containing 2 of 3 C-terminal hydrophobic regions were secreted, indicating that these do not act as transmembrane anchors. The efficiency of cleavage of the gB furin site was found to depend on the nature of C-terminus. All of the gB constructs formed rosette structures reminiscent of the postfusion aggregates formed by other viral fusion proteins. However, substitution of putative fusion loop residues, WY{sup 112-113} and WLIY{sup 193-196}, with less hydrophobic amino acids from HSV-1 gB, produced trimeric protein and abrogated the ability of the EBV gB ectodomains to form rosettes. These data demonstrate biochemical features of EBV gB that are characteristic of other class I and class II viral fusion proteins, but not of HSV-1 gB.
- OSTI ID:
- 21077991
- Journal Information:
- Virology, Journal Name: Virology Journal Issue: 1 Vol. 368; ISSN VIRLAX; ISSN 0042-6822
- Country of Publication:
- United States
- Language:
- English
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