biology

Low-density-lipoprotein receptor kinase

Low-density-lipoprotein receptor kinase is a biology 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 Low-density-lipoprotein receptor kinase rather than just read about it. In short: In enzymology, a low-density-lipoprotein receptor kinase (EC 2.7.11.29) is an enzyme that catalyzes the chemical reaction ATP + [low-density-lipoprotein receptor]-L-serine ⇌ {\displaystyle \rightleftharpoons } ADP + [low-density-lipoprotein receptor]-O-phospho-L-serine Thus, the two substrates of this enzyme are ATP and [[[low-density-lipoprotein receptor]-L-serine]], whereas its two products are ADP and [[[low-dens…

Key takeaways

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

Reference excerpt

In enzymology, a low-density-lipoprotein receptor kinase (EC 2.7.11.29) is an enzyme that catalyzes the chemical reaction

ATP + [low-density-lipoprotein receptor]-L-serine ⇌ {\displaystyle \rightleftharpoons } ADP + [low-density-lipoprotein receptor]-O-phospho-L-serine Thus, the two substrates of this enzyme are ATP and [[[low-density-lipoprotein receptor]-L-serine]], whereas its two products are ADP and [[[low-density-lipoprotein receptor]-O-phospho-L-serine]]. This enzyme belongs to the family of transferases, specifically those transferring a phosphate group to the sidechain oxygen atom of serine or threonine residues in proteins (protein-serine/threonine kinases). The systematic name of this enzyme class is ATP:[low-density-lipoprotein receptor]-L-serine O-phosphotransferase. Other names in common use include ATP:low-density-lipoprotein-L-serine O-phosphotransferase, LDL receptor kinase, [low-density-lipoprotein] kinase, low-density lipoprotein kinase, low-density-lipoprotein receptor kinase (phosphorylating), and STK7.

References

Kishimoto A, Brown MS, Slaughter CA, Goldstein JL (1987). "Phosphorylation of serine 833 in cytoplasmic domain of low density lipoprotein receptor by a high molecular weight enzyme resembling casein kinase II". J. Biol. Chem. 262 (3): 1344–51. doi:10.1016/S0021-9258(19)75792-5. PMID 3100530. Kishimoto A, Goldstein JL, Brown MS (1987). "Purification of catalytic subunit of low density lipoprotein receptor kinase and identification of heat-stable activator protein". J. Biol. Chem. 262 (19): 9367–73. doi:10.1016/S0021-9258(18)48089-1. PMID 3597414.

Worked examples

Example 1 — a first encounter with Low-density-lipoprotein receptor kinase

Start with the simplest possible case. Write down what Low-density-lipoprotein receptor kinase claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 Low-density-lipoprotein receptor kinase 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 Low-density-lipoprotein receptor kinase 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 Low-density-lipoprotein receptor kinase

In research: Low-density-lipoprotein receptor kinase appears in biology 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 Low-density-lipoprotein receptor kinase 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: Low-density-lipoprotein receptor kinase is common in secondary-school and first-year university syllabi. It links to neighbouring topics EC 2.7.11, EC 2.7 stubs, Enzymes of unknown structure, so understanding it makes those chapters shorter.
In everyday life: Look for Low-density-lipoprotein receptor kinase 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 Low-density-lipoprotein receptor kinase in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Low-density-lipoprotein receptor kinase 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 Low-density-lipoprotein receptor kinase out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Low-density-lipoprotein receptor kinase in simple terms?

In enzymology, a low-density-lipoprotein receptor kinase (EC 2.7.11.29) is an enzyme that catalyzes the chemical reaction ATP + [low-density-lipoprotein receptor]-L-serine ⇌ {\displaystyle \rightleftharpoons } ADP + [low-density-lipoprotein receptor]-O-phospho-L-serine Thus, the two substrates of t…

Why does Low-density-lipoprotein receptor kinase matter?

Because it connects several biology 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 Low-density-lipoprotein receptor kinase?

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 Low-density-lipoprotein receptor kinase.