engineering

Tyrosine phenol-lyase

Tyrosine phenol-lyase 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 Tyrosine phenol-lyase rather than just read about it. In short: The enzyme tyrosine phenol-lyase (EC 4.1.99.2) catalyzes the chemical reaction L-tyrosine + H2O ⇌ {\displaystyle \rightleftharpoons } phenol + pyruvate + NH3 This enzyme belongs to the family of lyases, specifically in the "catch-all" class of carbon-carbon lyases. The systematic name of this enzyme class is L-tyrosine phenol-lyase (deaminating; pyruvate-forming).

Key takeaways

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

Reference excerpt

The enzyme tyrosine phenol-lyase (EC 4.1.99.2) catalyzes the chemical reaction

L-tyrosine + H2O ⇌ {\displaystyle \rightleftharpoons } phenol + pyruvate + NH3 This enzyme belongs to the family of lyases, specifically in the "catch-all" class of carbon-carbon lyases. The systematic name of this enzyme class is L-tyrosine phenol-lyase (deaminating; pyruvate-forming). Other names in common use include beta-tyrosinase, and L-tyrosine phenol-lyase (deaminating). This enzyme participates in tyrosine metabolism and nitrogen metabolism. It employs one cofactor, pyridoxal phosphate.

Structural studies As of late 2007, five structures have been solved for this class of enzyme, with PDB accession codes PDB: 1C7G, PDB: 1TPL, PDB: 2EZ1, PDB: 2EZ2, and PDB: 2TPL.

References

Kumagai H, Yamada H, Matsui H, Ohkishi H, Ogata K (1970). "Tyrosine phenol lyase. I. Purification, crystallization, and properties". J. Biol. Chem. 245 (7): 1767–72. doi:10.1016/S0021-9258(19)77158-0. PMID 4908868. Kumagai H, Yamada H, Matsui H, Ohkishi H, Ogata K (1970). "Tyrosine phenol lyase. II. Cofactor requirements". J. Biol. Chem. 245 (7): 1773–7. doi:10.1016/S0021-9258(19)77159-2. PMID 4908869.

Worked examples

Example 1 — a first encounter with Tyrosine phenol-lyase

Start with the simplest possible case. Write down what Tyrosine phenol-lyase 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 Tyrosine phenol-lyase 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 Tyrosine phenol-lyase 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 Tyrosine phenol-lyase

In research: Tyrosine phenol-lyase 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 Tyrosine phenol-lyase 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: Tyrosine phenol-lyase is common in secondary-school and first-year university syllabi. It links to neighbouring topics EC 4.1.99, EC 4.1 stubs, Enzymes of known structure, so understanding it makes those chapters shorter.
In everyday life: Look for Tyrosine phenol-lyase 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Tyrosine phenol-lyase” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Tyrosine phenol-lyase in 20 minutes

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

Frequently asked questions

What is Tyrosine phenol-lyase in simple terms?

The enzyme tyrosine phenol-lyase (EC 4.1.99.2) catalyzes the chemical reaction L-tyrosine + H2O ⇌ {\displaystyle \rightleftharpoons } phenol + pyruvate + NH3 This enzyme belongs to the family of lyases, specifically in the "catch-all" class of carbon-carbon lyases. The systematic name of this enzym…

Why does Tyrosine phenol-lyase 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 Tyrosine phenol-lyase?

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 Tyrosine phenol-lyase.