engineering

Tryptophan 2'-dioxygenase

Tryptophan 2'-dioxygenase 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 Tryptophan 2'-dioxygenase rather than just read about it. In short: In enzymology, a tryptophan 2'-dioxygenase (EC 1.13.99.3) is an enzyme that catalyzes the chemical reaction Thus, the 3 substrates of this enzyme are L-tryptophan, O2 and H+, whereas its 3 products are (indol-3-yl)glycolaldehyde, CO2, and NH+4. Classification This enzyme belongs to the family of oxidoreductases, specifically those acting on single donors with O2 as oxidant and incorporation of two atoms of oxygen in…

Key takeaways

Tryptophan 2'-dioxygenase belongs to engineering; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Tryptophan 2'-dioxygenase to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Tryptophan 2'-dioxygenase from memory before moving on to harder problems.

Reference excerpt

In enzymology, a tryptophan 2'-dioxygenase (EC 1.13.99.3) is an enzyme that catalyzes the chemical reaction

Thus, the 3 substrates of this enzyme are L-tryptophan, O2 and H+, whereas its 3 products are (indol-3-yl)glycolaldehyde, CO2, and NH+4.

Classification This enzyme belongs to the family of oxidoreductases, specifically those acting on single donors with O2 as oxidant and incorporation of two atoms of oxygen into the substrate (oxygenases). The oxygen incorporated need not be derived from O miscellaneous.

Nomenclature The systematic name of this enzyme class is L-tryptophan:oxygen 2'-oxidoreductase (side-chain-cleaving). Other names in common use include indole-3-alkane alpha-hydroxylase, tryptophan side-chain alpha,beta-oxidase, tryptophan side chain oxidase II, tryptophan side-chain oxidase, TSO, indolyl-3-alkan alpha-hydroxylase, tryptophan side chain oxidase type I, TSO I, TSO II, and tryptophan side chain oxidase.

Biological role This enzyme participates in tryptophan metabolism. It employs one cofactor, heme.

References

Roberts J, Rosenfeld HJ (1977). "Isolation, crystallization, and properties of indolyl-3-alkane alpha-hydroxylase. A novel tryptophan-metabolizing enzyme". J. Biol. Chem. 252 (8): 2640–7. doi:10.1016/S0021-9258(17)40506-0. PMID 15994. Takai K, Ushiro H, Noda Y, Narumiya S, Tokuyama T (1977). "Crystalline hemoprotein from Pseudomonas that catalyzes oxidation of side chain of tryptophan and other indole derivatives". J. Biol. Chem. 252 (8): 2648–56. doi:10.1016/S0021-9258(17)40507-2. PMID 15995.

Illustrations

Worked examples

Example 1 — a first encounter with Tryptophan 2'-dioxygenase

Start with the simplest possible case. Write down what Tryptophan 2'-dioxygenase 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 Tryptophan 2'-dioxygenase 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 Tryptophan 2'-dioxygenase 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 Tryptophan 2'-dioxygenase

In research: Tryptophan 2'-dioxygenase 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 Tryptophan 2'-dioxygenase 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: Tryptophan 2'-dioxygenase is common in secondary-school and first-year university syllabi. It links to neighbouring topics EC 1.13.99, Enzymes of unknown structure, Heme enzymes, so understanding it makes those chapters shorter.
In everyday life: Look for Tryptophan 2'-dioxygenase 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 Tryptophan 2'-dioxygenase in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Tryptophan 2'-dioxygenase 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 Tryptophan 2'-dioxygenase out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Tryptophan 2'-dioxygenase in simple terms?

In enzymology, a tryptophan 2'-dioxygenase (EC 1.13.99.3) is an enzyme that catalyzes the chemical reaction Thus, the 3 substrates of this enzyme are L-tryptophan, O2 and H+, whereas its 3 products are (indol-3-yl)glycolaldehyde, CO2, and NH+4. Classification This enzyme belongs to the family of ox…

Why does Tryptophan 2'-dioxygenase 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 Tryptophan 2'-dioxygenase?

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 Tryptophan 2'-dioxygenase.