engineering

Phosphatidyl-N-methylethanolamine N-methyltransferase

Phosphatidyl-N-methylethanolamine N-methyltransferase is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Phosphatidyl-N-methylethanolamine N-methyltransferase rather than just read about it. In short: In enzymology, a phosphatidyl-N-methylethanolamine N-methyltransferase (EC 2.1.1.71) is an enzyme that catalyzes the chemical reaction S-adenosyl-L-methionine + phosphatidyl-N-methylethanolamine ⇌ {\displaystyle \rightleftharpoons } S-adenosyl-L-homocysteine + phosphatidyl-N-dimethylethanolamine Thus, the two substrates of this enzyme are S-adenosyl methionine and phosphatidyl-N-methylethanolamine, whereas its two p…

Key takeaways

Phosphatidyl-N-methylethanolamine N-methyltransferase belongs to engineering; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Phosphatidyl-N-methylethanolamine N-methyltransferase to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Phosphatidyl-N-methylethanolamine N-methyltransferase from memory before moving on to harder problems.

Reference excerpt

In enzymology, a phosphatidyl-N-methylethanolamine N-methyltransferase (EC 2.1.1.71) is an enzyme that catalyzes the chemical reaction

S-adenosyl-L-methionine + phosphatidyl-N-methylethanolamine ⇌ {\displaystyle \rightleftharpoons } S-adenosyl-L-homocysteine + phosphatidyl-N-dimethylethanolamine Thus, the two substrates of this enzyme are S-adenosyl methionine and phosphatidyl-N-methylethanolamine, whereas its two products are S-adenosylhomocysteine and phosphatidyl-N-dimethylethanolamine. This enzyme belongs to the family of transferases, specifically those transferring one-carbon group methyltransferases. The systematic name of this enzyme class is S-adenosyl-L-methionine:phosphatidyl-N-methylethanolamine N-methyltransferase. Other names in common use include phosphatidylmonomethylethanolamine methyltransferase, methyltransferase II, phospholipid methyltransferase, PLMT, phosphatidyl-N-methylethanolamine methyltransferase, phosphatidyl-N-monomethylethanolamine methyltransferase, phosphatidylethanolamine methyltransferase I, and phosphatidylmonomethylethanolamine methyltransferase. This enzyme participates in glycine, serine and threonine metabolism and glycerophospholipid metabolism.

References

Hirata F, Viveros OH, Diliberto EJ, Axelrod J (1978). "Identification and properties of two methyltransferases in conversion of phosphatidylethanolamine to phosphatidylcholine". Proc. Natl. Acad. Sci. U.S.A. 75 (4): 1718–21. Bibcode:1978PNAS...75.1718H. doi:10.1073/pnas.75.4.1718. PMC 392410. PMID 25437. Schneider WJ, Vance DE (1979). "Conversion of phosphatidylethanolamine to phosphatidylcholine in rat liver. Partial purification and characterization of the enzymatic activities". J. Biol. Chem. 254 (10): 3886–91. doi:10.1016/S0021-9258(18)50670-0. PMID 438165.

Worked examples

Example 1 — a first encounter with Phosphatidyl-N-methylethanolamine N-methyltransferase

Start with the simplest possible case. Write down what Phosphatidyl-N-methylethanolamine N-methyltransferase claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Phosphatidyl-N-methylethanolamine N-methyltransferase before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Phosphatidyl-N-methylethanolamine N-methyltransferase ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Phosphatidyl-N-methylethanolamine N-methyltransferase

In research: Phosphatidyl-N-methylethanolamine N-methyltransferase appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Phosphatidyl-N-methylethanolamine N-methyltransferase in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Phosphatidyl-N-methylethanolamine N-methyltransferase is common in secondary-school and first-year university syllabi. It links to neighbouring topics EC 2.1.1, EC 2.1 stubs, Enzymes of unknown structure, so understanding it makes those chapters shorter.
In everyday life: Look for Phosphatidyl-N-methylethanolamine N-methyltransferase outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Phosphatidyl-N-methylethanolamine N-methyltransferase in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Phosphatidyl-N-methylethanolamine N-methyltransferase means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Phosphatidyl-N-methylethanolamine N-methyltransferase out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Phosphatidyl-N-methylethanolamine N-methyltransferase in simple terms?

In enzymology, a phosphatidyl-N-methylethanolamine N-methyltransferase (EC 2.1.1.71) is an enzyme that catalyzes the chemical reaction S-adenosyl-L-methionine + phosphatidyl-N-methylethanolamine ⇌ {\displaystyle \rightleftharpoons } S-adenosyl-L-homocysteine + phosphatidyl-N-dimethylethanolamine Th…

Why does Phosphatidyl-N-methylethanolamine N-methyltransferase matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Phosphatidyl-N-methylethanolamine N-methyltransferase?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Phosphatidyl-N-methylethanolamine N-methyltransferase.