engineering

Putrescine N-methyltransferase

Putrescine 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 Putrescine N-methyltransferase rather than just read about it. In short: Putrescine N-methyltransferase (EC 2.1.1.53) is an enzyme that catalyzes the chemical reaction This is a methylation reaction in which putrescine is converted to N-methylputrescine. The methyl group comes from the cofactor, S-adenosyl methionine (SAM), which becomes S-adenosyl-L-homocysteine (SAH).

Key takeaways

Putrescine 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 Putrescine N-methyltransferase to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Putrescine N-methyltransferase from memory before moving on to harder problems.

Reference excerpt

Putrescine N-methyltransferase (EC 2.1.1.53) is an enzyme that catalyzes the chemical reaction

This is a methylation reaction in which putrescine is converted to N-methylputrescine. The methyl group comes from the cofactor, S-adenosyl methionine (SAM), which becomes S-adenosyl-L-homocysteine (SAH). 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:putrescine N-methyltransferase. This enzyme is also called putrescine methyltransferase. This enzyme participates in alkaloid biosynthesis ii. This enzyme is important in the synthesis of many plant alkaloids. It evolved from spermidine synthase.

References

Illustrations

Worked examples

Example 1 — a first encounter with Putrescine N-methyltransferase

Start with the simplest possible case. Write down what Putrescine 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 Putrescine 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 Putrescine 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 Putrescine N-methyltransferase

In research: Putrescine 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 Putrescine 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: Putrescine 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 Putrescine 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 Putrescine N-methyltransferase in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Putrescine 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 Putrescine N-methyltransferase out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Putrescine N-methyltransferase in simple terms?

Putrescine N-methyltransferase (EC 2.1.1.53) is an enzyme that catalyzes the chemical reaction This is a methylation reaction in which putrescine is converted to N-methylputrescine. The methyl group comes from the cofactor, S-adenosyl methionine (SAM), which becomes S-adenosyl-L-homocysteine (SAH).

Why does Putrescine 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 Putrescine 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 Putrescine N-methyltransferase.