engineering

Tropinone reductase I

Tropinone reductase I 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 Tropinone reductase I rather than just read about it. In short: In enzymology, a tropinone reductase I (EC 1.1.1.206) is an enzyme that catalyzes the chemical reaction tropine + NADP+ ⇌ {\displaystyle \rightleftharpoons } tropinone + NADPH + H+ Thus, the two substrates of this enzyme are tropine and NADP+, whereas its 3 products are tropinone, NADPH, and H+. This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD+ or N…

Key takeaways

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

Reference excerpt

In enzymology, a tropinone reductase I (EC 1.1.1.206) is an enzyme that catalyzes the chemical reaction

tropine + NADP+ ⇌ {\displaystyle \rightleftharpoons } tropinone + NADPH + H+ Thus, the two substrates of this enzyme are tropine and NADP+, whereas its 3 products are tropinone, NADPH, and H+. This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is tropine:NADP+ 3alpha-oxidoreductase. Other names in common use include tropine dehydrogenase, tropinone reductase (ambiguous), and TR-I. This enzyme participates in alkaloid biosynthesis ii.

References

Koelen KJ; Gross, GG (1982). "Partial purification and properties of tropine dehydrogenase from root cultures of Datura stramonium". Planta Med. 44 (4): 227–230. Bibcode:1982PlMed..44..227K. doi:10.1055/s-2007-971454. PMID 17402126. Couladis MM, Friesen JB, Landgrebe ME, Leete E (1991). "Enzymes catalysing the reduction of tropinone to tropine and ψ-tropine isolated from the roots of Datura innoxia'". Phytochemistry. 30 (3): 801–805. Bibcode:1991PChem..30..801C. doi:10.1016/0031-9422(91)85255-X. Nakajima K, Hashimoto T, Yamada Y (1993). "Two tropinone reductases with different stereospecificities are short-chain dehydrogenases evolved from a common ancestor". Proc. Natl. Acad. Sci. U.S.A. 90 (20): 9591–5. Bibcode:1993PNAS...90.9591N. doi:10.1073/pnas.90.20.9591. PMC 47615. PMID 8415746. Drager B (2006). "Tropinone reductases, enzymes at the branch point of tropane alkaloid metabolism". Phytochemistry. 67 (4): 327–37. Bibcode:2006PChem..67..327D. doi:10.1016/j.phytochem.2005.12.001. PMID 16426652.

Worked examples

Example 1 — a first encounter with Tropinone reductase I

Start with the simplest possible case. Write down what Tropinone reductase I 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 Tropinone reductase I 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 Tropinone reductase I 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 Tropinone reductase I

In research: Tropinone reductase I 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 Tropinone reductase I 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: Tropinone reductase I is common in secondary-school and first-year university syllabi. It links to neighbouring topics EC 1.1.1, EC 1.1.1 stubs, Enzymes of known structure, so understanding it makes those chapters shorter.
In everyday life: Look for Tropinone reductase I 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 Tropinone reductase I in 20 minutes

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

Frequently asked questions

What is Tropinone reductase I in simple terms?

In enzymology, a tropinone reductase I (EC 1.1.1.206) is an enzyme that catalyzes the chemical reaction tropine + NADP+ ⇌ {\displaystyle \rightleftharpoons } tropinone + NADPH + H+ Thus, the two substrates of this enzyme are tropine and NADP+, whereas its 3 products are tropinone, NADPH, and H+. Th…

Why does Tropinone reductase I 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 Tropinone reductase I?

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 Tropinone reductase I.