Jost, Ricarda; Berkowitz, Oliver; Shaw, John; Masle, Josette
In plants the triple methylation of phosphoethanolamine to phosphocholine catalyzed by phosphoethanolamine N-methyltransferase (PEAMT) is considered a rate-limiting step in the de novo synthesis of phosphatidylcholine. Besides being a major membrane phospholipid, phosphatidylcholine can be hydrolyzed into choline and phosphatidic acid. Phosphatidic acid is widely recognized as a second messenger in stress signaling, and choline can be oxidized within the chloroplast to yield the putative...[Show more]
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