Phosphatidylethanolamine N-methyltransferase

Catalyzes the three sequential steps of the methylation pathway for the biosynthesis of phosphatidylcholine, a critical and essential component for membrane structure. Uses S-adenosylmethionine (S-adenosyl-L-methionine, SAM or AdoMet) as the methyl group donor for the methylation of phosphatidylethanolamine (1,2-diacyl-sn-glycero-3-phosphoethanolamine, PE) to phosphatidylmonomethylethanolamine (1,2-diacyl-sn-glycero-3-phospho-N-methylethanolamine, PMME), PMME to phosphatidyldimethylethanolamine (1,2-diacyl-sn-glycero-3-phospho-N,N-dimethylethanolamine, PDME), and PDME to phosphatidylcholine (1,2-diacyl-sn-glycero-3-phosphocholine, PC), producing S-adenosyl-L-homocysteine in each step. Responsible for approximately 30% of hepatic PC with the CDP-choline pathway accounting for the other 70% (Probable).; [Isoform 1]: Catalyzes the three sequential steps of the methylation of 1,2-diacyl-sn-glycero-3-phospho-N-methylethanolamine (PMME) to 1,2-diacyl-sn-glycero-3-phospho-N,N-dimethylethanolamine (PDME) more efficiently than isoform 2. Induces increase in PC species with longer polyunsaturated chains than isoform 2.; [Isoform 2]: Produces a higher increase in the level of PC species containing long chains with three double bonds than isoform 1. {ECO:0000269|}.

PDB Code:
Native
Stable
Pure
Active protein
Recombinant protein
Human Origin
Entry name:
PEMT_HUMAN
Gene name:
PEMT
Uniprot accession:
Q9UBM1
Origin:
Homo sapiens (Human)
Protein family:
Class VI-like SAM-binding methyltransferase superfamily, PEMT/PEM2 methyltransferase
Full-length:
199
Mass:
22134
Sequence:
MTRLLGYVDPLDPSFVAAVITITFNPLYWNVVARWEHKTRKLSRAFGSPYLACYSLSVTILLLNFLRSHCFTQAMLSQPRMESLDTPAAYSLGLALLGLGVVLVLSSFFALGFAGTFLGDYFGILKEARVTVFPFNILDNPMYWGSTANYLGWAIMHASPTGLLLTVLVALTYIVALLYEEPFTAEIYRQKASGSHKRS
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Expression systems: bacteria, yeast, insect cells, HEK & CHO mammalian cells
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