Abstract
We describe the reconstitution and purification of a membrane-associated phosphoinositide-specific phospholipase C (PIC) from turkey erythrocyte ghosts. This PIC is responsive to a G-protein coupled to P 2y purinergic receptors which are expressed in turkey erythrocytes. Reconstitution is achieved by adding partially purified PIC to [ 3H]inositol-prelabelled turkey erythrocyte membranes depleted of their endogenous PIC (acceptor membranes). PIC activity is associated with a 52 kDa polypeptide on SDS-polyacrylamide gel electrophoresis. Addition of a 307-fold purified enzyme to the acceptor membranes has no effect on basal PIC activity, but markedly increases the response to GTPγS and P 2y-purinergic receptor activation.
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