The Nef-Infectivity Enigma: Mechanisms of Enhanced Lentiviral Infection
Jolien Vermeire, Griet Vanbillemont, Wojciech Witkowski and Bruno Verhasselt
Pages 474-489 (16)
The Nef protein is an essential factor for lentiviral pathogenesis in humans and other simians. Despite a multitude of functions attributed to this protein, the exact role of Nef in disease progression remains unclear. One of its most intriguing functions is the ability of Nef to enhance the infectivity of viral particles. In this review we will discuss current insights in the mechanism of this well-known, yet poorly understood Nef effect. We will elaborate on effects of Nef, on both virion biogenesis and the early stage of the cellular infection, that might be involved in infectivity enhancement. In addition, we provide an overview of different HIV-1 Nef domains important for optimal infectivity and briefly discuss some possible sources of the frequent discrepancies in the field. Hereby we aim to contribute to a better understanding of this highly conserved and therapeutically attractive Nef function.
Nef, HIV, infectivity, viral replication, mutation analysis, envelope protein, cholesterol, proteasome, NEF PROTEIN, Domain Mutations
Department of Clinical Chemistry, Microbiology and Immunology, Ghent University, De Pintelaan 185, UZ Gent, B-9000 Gent, Belgium.