Search results for "Staphylococcus aureus α-toxin"

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Regulation of phospholipase D activity in synaptosomes permeabilized with Staphylococcus aureus alpha-toxin.

1998

In order to investigate the regulation of presynaptic phospholipase D (PLD) activity by calcium and G proteins, we established a permeabilization procedure for rat cortical synaptosomes using Staphylococcus aureus alpha-toxin (30-100 microg/ml). In permeabilized synaptosomes, PLD activity was significantly stimulated when the concentration of free calcium was increased from 0.1 microM to 1 microM. This activation was inhibited in the presence of KN-62 (1 microM), an inhibitor of calcium/calmodulin-dependent kinase II (CaMKII), but not by the protein kinase C inhibitor, Ro 31-8220 (1-10 microM). Synaptosomal PLD activity was also stimulated in the presence of 1 microM GTPgammaS. When Rho pro…

MaleStaphylococcus aureusCell Membrane PermeabilityG proteinBacterial ToxinsBiophysicschemistry.chemical_elementCalciumBiologyIn Vitro TechniquesBiochemistryClostridium difficile toxin Bchemistry.chemical_compoundHemolysin ProteinsStructural BiologyStaphylococcus aureus α-toxinCa2+/calmodulin-dependent protein kinaseSynaptosomeGeneticsPhospholipase DPhospholipase D activityAnimalsRats WistarMolecular BiologyProtein kinase CSynaptosomePhospholipase DRho proteinCalcium/calmodulin-dependent protein kinase IICell BiologyBrefeldin AMolecular biologyRatsEnzyme Activationenzymes and coenzymes (carbohydrates)BiochemistrychemistryGuanosine 5'-O-(3-Thiotriphosphate)lipids (amino acids peptides and proteins)CalciumSynaptosomesFEBS letters
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