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- W1964033236 abstract "Mastoparan (MP), a wasp venom peptide, is known both to interact with G-proteins and to alter membrane structure and function. To determine the structural requirements for these two aspects of MP action, we constructed several analogs of the peptide and characterized them using Swiss 3T3 cell membranes. The effects of these peptides were measured on: i) G-protein-mediated stimulation of phospholipase-C activity by GTPγS and bombesin and ii) the membrane enzyme activities, calcium-activated phospholipase-C and Na,K-ATPase. MP strongly inhibited all the above activities and caused membrane permeabilization. Substitution of one Lys residue by Gly at either the N- or C-terminal of the MP molecule resulted in peptides which selectively inhibited G-protein stimulated phospholipase-C with no or very slight membrane-perturbing effects. Introduction of additional Lys residues to MP led to the opposite effect. Thus, G-protein modulating and membrane disrupting actions of MP appear to be not necessarily linked, and may be separated." @default.
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- W1964033236 date "1993-11-01" @default.
- W1964033236 modified "2023-10-17" @default.
- W1964033236 title "Selective Effects of Mastoparan Analogs: Separation of G-Protein-Directed and Membrane-Perturbing Activities" @default.
- W1964033236 doi "https://doi.org/10.1006/bbrc.1993.2393" @default.
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