engineering

Precorrin-4 C11-methyltransferase

Precorrin-4 C11-methyltransferase 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 Precorrin-4 C11-methyltransferase rather than just read about it. In short: Precorrin-4 C11-methyltransferase (EC 2.1.1.133) is an enzyme that catalyzes the chemical reaction This is a methylation reaction in which the cobalamin precursor, precorrin-4, is converted to precorrin-4. The methyl group comes from the cofactor, S-adenosyl methionine (SAM), which becomes S-adenosyl-L-homocysteine (SAH).

Key takeaways

Precorrin-4 C11-methyltransferase belongs to engineering; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Precorrin-4 C11-methyltransferase to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Precorrin-4 C11-methyltransferase from memory before moving on to harder problems.

Reference excerpt

Precorrin-4 C11-methyltransferase (EC 2.1.1.133) is an enzyme that catalyzes the chemical reaction

This is a methylation reaction in which the cobalamin precursor, precorrin-4, is converted to precorrin-4. The methyl group comes from the cofactor, S-adenosyl methionine (SAM), which becomes S-adenosyl-L-homocysteine (SAH). The enzyme was characterised from Pseudomonas denitrificans and Salmonella typhimurium. This enzyme belongs to the family of transferases, specifically those transferring one-carbon group methyltransferases. The systematic name of this enzyme class is S-adenosyl-L-methionine:precorrin-4 C11 methyltransferase. Other names in common use include precorrin-3 methylase, and CobM. It is part of the biosynthetic pathway to vitamin B12 in aerobic bacteria.

Illustrations

Worked examples

Example 1 — a first encounter with Precorrin-4 C11-methyltransferase

Start with the simplest possible case. Write down what Precorrin-4 C11-methyltransferase 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 Precorrin-4 C11-methyltransferase 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 Precorrin-4 C11-methyltransferase 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 Precorrin-4 C11-methyltransferase

In research: Precorrin-4 C11-methyltransferase 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 Precorrin-4 C11-methyltransferase 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: Precorrin-4 C11-methyltransferase is common in secondary-school and first-year university syllabi. It links to neighbouring topics EC 2.1.1, EC 2.1 stubs, Enzymes of known structure, so understanding it makes those chapters shorter.
In everyday life: Look for Precorrin-4 C11-methyltransferase 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.

Affiliate

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

How to study Precorrin-4 C11-methyltransferase in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Precorrin-4 C11-methyltransferase 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 Precorrin-4 C11-methyltransferase out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Precorrin-4 C11-methyltransferase in simple terms?

Precorrin-4 C11-methyltransferase (EC 2.1.1.133) is an enzyme that catalyzes the chemical reaction This is a methylation reaction in which the cobalamin precursor, precorrin-4, is converted to precorrin-4. The methyl group comes from the cofactor, S-adenosyl methionine (SAM), which becomes S-adenos…

Why does Precorrin-4 C11-methyltransferase 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 Precorrin-4 C11-methyltransferase?

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 Precorrin-4 C11-methyltransferase.