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Medientyp:
E-Artikel
Titel:
Hydrophobic Residues That Form Putative Fusion Loops of Epstein-Barr Virus Glycoprotein B Are Critical for Fusion Activity
Beteiligte:
Backovic, Marija;
Jardetzky, Theodore S.;
Longnecker, Richard
Erschienen:
American Society for Microbiology, 2007
Erschienen in:
Journal of Virology, 81 (2007) 17, Seite 9596-9600
Sprache:
Englisch
DOI:
10.1128/jvi.00758-07
ISSN:
0022-538X;
1098-5514
Entstehung:
Anmerkungen:
Beschreibung:
ABSTRACT To test the importance of the hydrophobic residues within the putative Epstein-Barr virus (EBV) glycoprotein B (gB) fusion loops in membrane fusion, WY 112-113 and WLIW 193-196 were mutated into alanine, glutamic acid, or the analogous residues from herpes simplex virus type 1 (HSV-1) gB (HR and RVEA). All gB variants exhibited cell surface expression, demonstrating that the substitutions did not perturb gB trafficking. None of six gB variants was, however, capable of mediating fusion with either epithelial or B cells. These data demonstrate that the bulky and hydrophobic EBV loop residues, which differ from the more hydrophilic HSV-1 residues and appear more compatible with membrane insertion, are essential for EBV gB-dependent fusion.