viroidin has been researched along with viroisin* in 2 studies
2 other study(ies) available for viroidin and viroisin
Article | Year |
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Virotoxins polymerize actin and induce membrane fragmentation in cytoplasmic preparations of Amoeba proteus.
Virotoxins and phalloidin are peptides that induce actin polymerization in vitro. We have compared the effect of five virotoxins and phalloidin on the ultrastructure of spread preparations of Amoeba proteus cytoplasm. Like phalloidin, the five virotoxins induce polymerization of cytoplasmic actin. Moreover, the virotoxins, but not phalloidin, induce membrane fragmentation in small spherical vesicles. We, therefore, conclude that these virotoxins may have another membrane-bound target besides actin. Topics: Actins; Amoeba; Animals; Cell Membrane; Peptides, Cyclic; Phalloidine; Polymers | 1992 |
[Amanita virosa peptides: viroidin and viroisin are more effective than phalloidin for the in vitro protection of actin against the effects of osmic acid].
Virotoxins are a group of monocyclic peptides recently identified in the deadly mushroom Amanita virosa by Faulstich and coll. We found that two of these peptides, which have a methyl sulfonyl group, namely viroidin and viroisin are very effective to protect F-actin against oxidative degradation by osmium tetroxide in vitro. Their desoxo analogs, which have a methyl sulfoxyde group instead of methyl sulfonyl are less active, therefore there exists a relationship between the chemistry of the sulfur group and the activity of the peptides. Topics: Actins; Agaricales; Amanita; Animals; In Vitro Techniques; Osmium; Osmium Tetroxide; Peptides, Cyclic; Phalloidine; Rabbits | 1983 |