1. Bovine herpesvirus 1 (BHV-1) envelope protein gE subcellular trafficking is contributed by two separate YXXL/Φ motifs within the cytoplasmic tail which together promote efficient virus cell-to-cell spread.
- Author
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Yezid H, Pannhorst K, Wei H, and Chowdhury SI
- Subjects
- Amino Acid Motifs, Animals, Cattle, Endocytosis, Herpesviridae Infections virology, Herpesvirus 1, Bovine genetics, Viral Proteins genetics, trans-Golgi Network virology, Cattle Diseases virology, Cytoplasm virology, Herpesviridae Infections veterinary, Herpesvirus 1, Bovine metabolism, Viral Proteins chemistry, Viral Proteins metabolism
- Abstract
Bovine herpesvirus envelope glycoprotein E (gE) and, in particular, the gE cytoplasmic tail (CT) is a virulence determinant in cattle. Also, the gE CT contributes to virus cell-to-cell spread and anterograde neuronal transport. In this study, our goal was to map the gE CT sub-domains that contribute to virus cell-to-cell spread property. A panel of gE-CT specific mutant viruses was constructed and characterized, in vitro, with respect to their plaque phenotypes, gE recycling and gE basolateral membrane targeting. The results revealed that disruption of the tyrosine-based motifs,
467 YTSL470 and563 YTVV566 , individually produced smaller plaque phenotypes than the wild type. However, they were slightly larger than the gE CT-null virus plaques. The Y467A mutation affected the gE endocytosis, gE trans-Golgi network (TGN) recycling, and gE virion incorporation properties. However, the Y563A mutation affected only the gE basolateral cell-surface redistribution function. Notably, the simultaneous Y467A/Y563A mutations produced gE CT-null virus-like plaque phenotypes., (Copyright © 2020 Elsevier Inc. All rights reserved.)- Published
- 2020
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