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The HERV-K(HML-2) family is the most recent addition to the collection of human endogenous retroviruses. It comprises proviruses that encode functional proteins that can assemble into replication defective particles carrying the envelope protein. Using a reconstituted HERV-K113 envelope sequence, we have analyzed its ability to mediate entry into a set of 33 cell lines from 10 species. Of these, 30...
Enveloped virus entry occurs when viral and cellular membranes fuse releasing particle contents into the target cell. Human immunodeficiency virus (HIV) entry occurs by cell-free virus or virus transferred between infected and uninfected cells through structures called virological synapses. We developed a high-throughput cell-based assay to identify small molecule inhibitors of cell-free or virological...
Influenza virus has two major structural modules, an external lipid envelope and an internal ribonucleocapsid containing the genomic RNA in the form of the ribonucleoprotein (RNP) complex, both of which are interlinked by the matrix protein M1. Here we studied M1-RNP cohesion within virus exposed to acidic pH in vitro. The effect of acidification was dependent on the cleavage of the surface glycoprotein...
Bacteriophages use most frequently a tail apparatus to create a channel across the entire bacterial cell envelope to transfer the viral genome to the host cell cytoplasm, initiating infection. Characterization of this critical step remains a major challenge due to the difficulty to monitor DNA entry in the bacterium and its requirements. In this work we developed a new method to study phage DNA entry...
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