engineering

Putrescine N-hydroxycinnamoyltransferase

Putrescine N-hydroxycinnamoyltransferase 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-hydroxycinnamoyltransferase rather than just read about it. In short: In enzymology, a putrescine N-hydroxycinnamoyltransferase (EC 2.3.1.138) is an enzyme that catalyzes the chemical reaction caffeoyl-CoA + putrescine ⇌ {\displaystyle \rightleftharpoons } CoA + N-caffeoylputrescine Thus, the two substrates of this enzyme are caffeoyl-CoA and putrescine, whereas its two products are CoA and N-caffeoylputrescine. This enzyme belongs to the family of transferases, specifically those acy…

Key takeaways

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

Reference excerpt

In enzymology, a putrescine N-hydroxycinnamoyltransferase (EC 2.3.1.138) is an enzyme that catalyzes the chemical reaction

caffeoyl-CoA + putrescine ⇌ {\displaystyle \rightleftharpoons } CoA + N-caffeoylputrescine Thus, the two substrates of this enzyme are caffeoyl-CoA and putrescine, whereas its two products are CoA and N-caffeoylputrescine. This enzyme belongs to the family of transferases, specifically those acyltransferases transferring groups other than aminoacyl groups. The systematic name of this enzyme class is caffeoyl-CoA:putrescine N-(3,4-dihydroxycinnamoyl)transferase. Other names in common use include caffeoyl-CoA putrescine N-caffeoyl transferase, PHT, putrescine hydroxycinnamoyl transferase, hydroxycinnamoyl-CoA:putrescine hydroxycinnamoyltransferase, and putrescine hydroxycinnamoyltransferase.

References

Negrel J (1989). "The biosynthesis of cinnamoylputrescines in callus-tissue cultures of Nicotiana tabacum". Phytochemistry. 28 (2): 477–481. Bibcode:1989PChem..28..477N. doi:10.1016/0031-9422(89)80035-4.

Worked examples

Example 1 — a first encounter with Putrescine N-hydroxycinnamoyltransferase

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

In research: Putrescine N-hydroxycinnamoyltransferase 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-hydroxycinnamoyltransferase 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-hydroxycinnamoyltransferase is common in secondary-school and first-year university syllabi. It links to neighbouring topics EC 2.3.1, EC 2.3 stubs, Enzymes of unknown structure, so understanding it makes those chapters shorter.
In everyday life: Look for Putrescine N-hydroxycinnamoyltransferase 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-hydroxycinnamoyltransferase in 20 minutes

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

Frequently asked questions

What is Putrescine N-hydroxycinnamoyltransferase in simple terms?

In enzymology, a putrescine N-hydroxycinnamoyltransferase (EC 2.3.1.138) is an enzyme that catalyzes the chemical reaction caffeoyl-CoA + putrescine ⇌ {\displaystyle \rightleftharpoons } CoA + N-caffeoylputrescine Thus, the two substrates of this enzyme are caffeoyl-CoA and putrescine, whereas its…

Why does Putrescine N-hydroxycinnamoyltransferase 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-hydroxycinnamoyltransferase?

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-hydroxycinnamoyltransferase.