chemistry

Quinate O-hydroxycinnamoyltransferase

Quinate O-hydroxycinnamoyltransferase is a chemistry 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 Quinate O-hydroxycinnamoyltransferase rather than just read about it. In short: In enzymology, a quinate O-hydroxycinnamoyltransferase (EC 2.3.1.99) is an enzyme that catalyzes the chemical reaction feruloyl-CoA + quinate ⇌ {\displaystyle \rightleftharpoons } CoA + O-feruloylquinate Thus, the two substrates of this enzyme are feruloyl-CoA and quinate, whereas its two products are CoA and O-feruloylquinate. This enzyme belongs to the family of transferases, specifically those acyltransferases tr…

Key takeaways

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

Reference excerpt

In enzymology, a quinate O-hydroxycinnamoyltransferase (EC 2.3.1.99) is an enzyme that catalyzes the chemical reaction

feruloyl-CoA + quinate ⇌ {\displaystyle \rightleftharpoons } CoA + O-feruloylquinate

Thus, the two substrates of this enzyme are feruloyl-CoA and quinate, whereas its two products are CoA and O-feruloylquinate. 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 feruloyl-CoA:quinate O-(hydroxycinnamoyl)transferase. This enzyme is also called hydroxycinnamoyl coenzyme A-quinate transferase. This enzyme participates in phenylpropanoid biosynthesis.

References

Strack D, Gross W, Wray V, Grotjahn L (1987). "Enzymic Synthesis of Caffeoylglucaric Acid from Chlorogenic Acid and Glucaric Acid by a Protein Preparation from Tomato Cotyledons". Plant Physiol. 83 (3): 475–478. doi:10.1104/pp.83.3.475. PMC 1056389. PMID 16665274. Strack D, Keller H, Weissenbock G (1987). "Enzymatic-synthesis of hydroxycinnamic acid-esters of sugar acids and hydroaromatic acids by protein preparations from rye (Secale cereale) primary leaves". J. Plant Physiol. 131 (1–2): 61–73. Bibcode:1987JPPhy.131...61S. doi:10.1016/s0176-1617(87)80268-7. Villegas RJ, Kojima M (1986). "Purification and characterization of hydroxycinnamoyl D-glucose Quinate hydroxycinnamoyl transferase in the root of sweet potato, Ipomoea batatas Lam". J. Biol. Chem. 261 (19): 8729–33. doi:10.1016/S0021-9258(19)84441-1. PMID 3722170.

Worked examples

Example 1 — a first encounter with Quinate O-hydroxycinnamoyltransferase

Start with the simplest possible case. Write down what Quinate O-hydroxycinnamoyltransferase claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, 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 Quinate O-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 Quinate O-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 Quinate O-hydroxycinnamoyltransferase

In research: Quinate O-hydroxycinnamoyltransferase appears in chemistry 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 Quinate O-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: Quinate O-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 Quinate O-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 Quinate O-hydroxycinnamoyltransferase in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Quinate O-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.
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Frequently asked questions

What is Quinate O-hydroxycinnamoyltransferase in simple terms?

In enzymology, a quinate O-hydroxycinnamoyltransferase (EC 2.3.1.99) is an enzyme that catalyzes the chemical reaction feruloyl-CoA + quinate ⇌ {\displaystyle \rightleftharpoons } CoA + O-feruloylquinate Thus, the two substrates of this enzyme are feruloyl-CoA and quinate, whereas its two products…

Why does Quinate O-hydroxycinnamoyltransferase matter?

Because it connects several chemistry 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 Quinate O-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 Quinate O-hydroxycinnamoyltransferase.