CMP-dependent phosphatidylinositol:myo-inositol exchange activity in isolated nerve-endings.
Greatly enhanced manganese-dependent phosphatidylinositol:myo-inositol exchange activity was observed when isolated, intact nerve-endings were incubated with the nucleotide, CMP, suggesting that the enzyme, CDP-diglyceride:inositol phosphatidyl transferase, catalyzes this exchange. CMP, at 10 microM, produced as much myo-[2-3H] inositol incorporation into phosphatidylinositol as did 1 mM. This CMP-stimulated exchange activity may reside on the plasma membrane.
D000818:Animals; D003568:Cytidine Monophosphate / Q000494:pharmacology*; D003597:Cytosine Nucleotides / Q000494:pharmacology*; D066298:In Vitro Techniques; D007294:Inositol / Q000378:metabolism*; D009411:Nerve Endings / Q000378:metabolism*; D010716:Phosphatidylinositols / Q000378:metabolism*; D051381:Rats; D011919:Rats, Inbred Strains; D013570:Synaptic Membranes / Q000378:metabolism; D013574:Synaptosomes / Q000378:metabolism
D003597:Cytosine Nucleotides; D010716:Phosphatidylinositols; D007294:Inositol; D003568:Cytidine Monophosphate