Phosphatidylcholine in Plants: Functional Diversity of
Living reference work entry
Zwitterion – also called a dipolar ion – is a neutral molecule with both positive and negative electrical charges which can exist in both anionic and cationic states.
Tonoplast – a membrane surrounding vacuole.
Structure and Occurrence
Phosphatidylcholine (PC, also termed “lecithin”) is one of the key phospholipids that build cellular membranes of plants and animals, but it is not ubiquitously found in bacteria. The molecule was originally isolated from animal tissues as “lecithin” (Gobley 1874). Structurally, PC is composed of an aminoalcohol polar head group (choline) and two fatty acids esterified to its glycerol backbone, as well as a phosphodiester bond linking the third hydroxyl group to choline (Fig. 1). The complete structure of PC is 1,2-diacyl-sn-glycerol-3-phosphocholine PC is structurally related to two other phospholipids – phosphatidylethanolamine (PE)...
KeywordsPhosphatidic Acid Phosphatidic Acid Lysophosphatidic Acid Amino Alcohol Negative Electrical Charge
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