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The viroporin activity of the E protein from murine hepatitis virus (MHV), a member of the coronaviruses, was analyzed. Viroporins are a growing family of viral proteins able to enhance membrane permeability, promoting virus budding. Initially, the MHV E gene was inducibly expressed in Escherichia coli cells, leading to the arrest of bacterial growth, cell lysis and permeabilization to different compounds...
The vast majority of animal viruses enhance membrane permeability at two moments of infection. Herein, we describe that the entry of Sindbis virus (SV) in BHK cells promotes the co-entry of the macromolecule alpha-sarcin into the cytoplasm, thereby blocking translation. At a later stage, this protein toxin cannot enter the cell, while low molecular weight compounds, such as hygromycin B, readily pass...
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