Activation of partially purified rat liver lipid methyltransferase by phosphorylation.
Incubation of partially purified rat liver lipid methyltransferase with MgATP and the catalytic subunit of the cyclic AMP dependent protein kinase results in up to 4-fold activation of the methylation reaction. When (gamma-32p) MgATP is included in the assay mixture, the analysis of the phosphoprotein products by electrophoresis shows the incorporation of 32p into a single protein band of about 50K and pI 4.75. It is concluded that rat liver lipid methyltransferase can be converted from a low activity dephosphorylated form to a high activity phosphorylated form.
D000255:Adenosine Triphosphate / Q000378:metabolism; D000818:Animals; D002352:Carrier Proteins / Q000378:metabolism*; D004789:Enzyme Activation; D047908:Intracellular Signaling Peptides and Proteins; D007700:Kinetics; D008745:Methylation; D008780:Methyltransferases / Q000302:isolation & purification / Q000378:metabolism*; D008862:Microsomes, Liver / Q000201:enzymology*; D008970:Molecular Weight; D050918:Phosphatidylethanolamine N-Methyltransferase; D010766:Phosphorylation; D011494:Protein Kinases / Q000378:metabolism*; D051381:Rats
D002352:Carrier Proteins; D047908:Intracellular Signaling Peptides and Proteins; C015482:protein kinase modulator; D000255:Adenosine Triphosphate; D008780:Methyltransferases; D050918:Phosphatidylethanolamine N-Methyltransferase; D011494:Protein Kinases