2.1.1.17: phosphatidylethanolamine N-methyltransferase
This is an abbreviated version!
For detailed information about phosphatidylethanolamine N-methyltransferase, go to the full flat file.
Word Map on EC 2.1.1.17
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2.1.1.17
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phosphatidylcholine
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choline
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homocysteine
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cytidylyltransferase
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cdp-choline
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betaine
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s-adenosylhomocysteine
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ctp:phosphocholine
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cdp-diacylglycerol
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phosphatidyl-n,n-dimethylethanolamine
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phosphatidyl-n-monomethylethanolamine
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choline-deficient
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transmethylation
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n-methyltransferases
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kennedy
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adomet
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vance
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phosphatidylmonomethylethanolamine
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medicine
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ptdcho
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analysis
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phosphatidyldimethylethanolamine
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mthfd1
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remethylation
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cholinephosphotransferase
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adohcy
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choline-supplemented
- 2.1.1.17
- phosphatidylcholine
- choline
- homocysteine
- cytidylyltransferase
- cdp-choline
- betaine
- s-adenosylhomocysteine
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ctp:phosphocholine
- cdp-diacylglycerol
- phosphatidyl-n,n-dimethylethanolamine
- phosphatidyl-n-monomethylethanolamine
-
choline-deficient
-
transmethylation
- n-methyltransferases
-
kennedy
- adomet
-
vance
- phosphatidylmonomethylethanolamine
- medicine
-
ptdcho
- analysis
- phosphatidyldimethylethanolamine
- mthfd1
-
remethylation
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cholinephosphotransferase
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adohcy
-
choline-supplemented
Reaction
Synonyms
lipid methyl transferase, LMTase, methyltransferase, phosphatidylethanolamine, PE N-MTase, PE-NMT, PEMT, PEMT shorter isoform, phosphatidylethanolamine methyltransferase, phosphatidylethanolamine N-methyltransferase, phosphatidylethanolamine-N-methylase, phosphatidylethanolamine-N-methyltransferase, phosphatidylethanolamine-S-adenosylmethionine methyltransferase, phospholipid N-methyltransferase, PmtA, PmtX1, PmtX3
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Specific Activity
Specific Activity on EC 2.1.1.17 - phosphatidylethanolamine N-methyltransferase
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additional information
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phosphatidylethanolamine N-methyltransferase activity is significantly lower in Mdr2 (+/-) compared to Mdr2 (+/+) mice: 1.20 nmol/mg/min vs. 1.98 nmol/mg/min. After 7 days on methionine and choline deficient diet enzyme activity is: Mdr2 (+/-) = 1.31 nmol/mg/min vs. Mdr2 (+/+) = 1.96 nmol/mg/min. After 30 days on methionine and choline deficient diet enzyme activity is: Mdr2 (+/-) = 1.60 nmol/mg/min vs. Mdr2 (+/+) = 1.99 nmol/mg/min
additional information
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the activity of phosphatidylethanolamine N-methyltransferase increases (58% higher on day 5, 72% higher on day 7) over 7 d following the injection of streptozotocin (injection of 60 mg/kg on day 0). Diabetes increases the phosphatidylethanolamine N-methyltransferase activity and abundance. Administration of all-trans-retinoic acid alone or in combination with streptozotocin has no effect on phosphatidylethanolamine N-methyltransferase activity. Phosphatidylethanolamine N-methyltransferase activity and abundance in the streptozotocin + insulin group is not significantly different from control values. The enzymatic activity of phosphatidylethanolamine N-methyltransferase is determined by measuring the incorporation of radiolabled methyl groups from S-adenosyl-L-[methyl-3H]methionine into phospholipids.
additional information
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there is a significant positive linear relationship between phosphatidylethanolamine N-methyltransferase activity and S-adenosylmethionine:S-adenosylhomocysteine ratio (r = 0.45). There is a significant inverse relationship between phosphatidylethanolamine N-methyltransferase activity and triglycerids. The metabolic conversion of radiolabeled phosphatidylethanolamine to phosphatidylcholine over 3 h incubation period is taken as a measure of phosphatidylethanolamine N-methyltransferase.
additional information
there is a significant positive linear relationship between phosphatidylethanolamine N-methyltransferase activity and S-adenosylmethionine:S-adenosylhomocysteine ratio (r = 0.45). There is a significant inverse relationship between phosphatidylethanolamine N-methyltransferase activity and triglycerids. The metabolic conversion of radiolabeled phosphatidylethanolamine to phosphatidylcholine over 3 h incubation period is taken as a measure of phosphatidylethanolamine N-methyltransferase.