Gramicidin S is a cationic cyclic peptide antibiotic that primarily targets bacterial cell membranes. It exhibits potent antibacterial activity by disrupting membrane integrity and inhibiting critical membrane protein functions, leading to cell death. The compound inserts into the phospholipid bilayer, specifically binding to negatively charged lipids, which interferes with cell division and wall synthesis. Additionally, Gramicidin S has been shown to inhibit ion channels, with IC50 values of 41 μM for Na+/K+-ATPase, 24 μM for tobacco leaf plasma membrane Mg2+/K+-ATPase, and 3 μM for rat heart plasma membrane Ca2+-ATPase, making it a valuable tool for research in microbiology and cell biology.
Gramicidin S is a cationic cyclic peptide antibiotic that primarily targets bacterial cell membranes. It exhibits potent antibacterial activity by disrupting membrane integrity and inhibiting critical membrane protein functions, leading to cell death. The compound inserts into the phospholipid bilayer, specifically binding to negatively charged lipids, which interferes with cell division and wall synthesis. Additionally, Gramicidin S has been shown to inhibit ion channels, with IC50 values of 41 μM for Na+/K+-ATPase, 24 μM for tobacco leaf plasma membrane Mg2+/K+-ATPase, and 3 μM for rat heart plasma membrane Ca2+-ATPase, making it a valuable tool for research in microbiology and cell biology.
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