The entry of a symbiont into a host cell, following endocytosis, via permeabilization of the endosomal membrane by membrane penetration protein(s) of the symbiont. This process mediates the entry of some non-enveloped virus into eukaryotic cells. In some cases, viral membrane-penetration protein requires to be activated to display its membrane penetrating activity. Activation can be due to receptor binding or the acidic pH of the endosomal lumen.
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narrow_synonym:
viral entry via permeabilization of endosomal membrane