Intercellular trafficking and protein delivery by a herpesvirus structural protein
- PMID: 9008163
- DOI: 10.1016/s0092-8674(00)81843-7
Intercellular trafficking and protein delivery by a herpesvirus structural protein
Abstract
We show that the HSV-1 structural protein VP22 has the remarkable property of intercellular transport, which is so efficient that following expression in a subpopulation the protein spreads to every cell in a monolayer, where it concentrates in the nucleus and binds chromatin. VP22 movement was observed both after delivery of DNA by transfection or microinjection and during virus infection. Moreover, we demonstrate that VP22 trafficking occurs via a nonclassical Golgi-independent mechanism. Sensitivity to cytochalasin D treatment suggests that VP22 utilizes a novel trafficking pathway that involves the actin cytoskeleton. In addition, we demonstrate intercellular transport of a VP22 fusion protein after endogenous synthesis or exogenous application, indicating that VP22 may have potential in the field of protein delivery.
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