PEMT-L and PEMT-S expression increase the cellular phosphatidylcholine content, whereas the phosphatidylethanolamine content is decreased by PEMT-S expression, but is hardly affected by PEMT-L expression. The cellular content of phosphatidylserine is also reduced by the expression of PEMT-L or PEMT-S
although the accumulation of the PLMT substrates phosphatidyl-N-monomethylethanolamine and phosphatidyl-N,N-dimethylethanolamine is considerably elevated in the plmt knock-out line, phosphatidylcholine levels remain normal, and no obvious differences are observed in plant morphology or development under standard growth conditions
Tanaka, Y.; Amano, F.; Maeda, M.; Nishijima, M.; Akamatsu, Y.
Purification and properties of phosphatidyl-N-monomethylethanolamine N-methyltransferase, the enzyme catalyzing the second and the third steps in the phosphatidylethanolamine N-methyltransferase system, from mouse liver microsomes