biology

Prokineticin receptor 2

Prokineticin receptor 2 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 Prokineticin receptor 2 rather than just read about it. In short: Prokineticin receptor 2 (PKR2), is a dimeric G protein-coupled receptor encoded by the PROKR2 gene in humans. Function Prokineticins are secreted proteins that can promote angiogenesis and induce strong gastrointestinal smooth muscle contraction.

Key takeaways

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

Reference excerpt

Prokineticin receptor 2 (PKR2), is a dimeric G protein-coupled receptor encoded by the PROKR2 gene in humans.

Function Prokineticins are secreted proteins that can promote angiogenesis and induce strong gastrointestinal smooth muscle contraction. The protein encoded by this gene is an integral membrane protein and G protein-coupled receptor for prokineticins. PKR2 is composed of 384 amino acids. Asparagine residues at position 7 and 27 undergo N-linked glycosylation. Cysteine residues at position 128 and 208 form a disulfide bond. The encoded protein is similar in sequence to GPR73, another G protein-coupled receptor for prokineticins. PKR2 is also linked to mammalian circadian rhythm. Levels of PKR2 mRNA fluctuate in the suprachiasmatic nucleus, increasing during the day and decreasing at night. Mutations in the PROKR2 (also known as KAL3) gene have been implicated in hypogonadotropic hypogonadism and gynecomastia. Total loss of PKR2 in mice leads to spontaneous torpor usually beginning at dusk and lasting for 8 hours on average. PKR2 functions as a G protein-coupled receptor, thus it has a signaling cascade when it's ligand binds. PKR2 is a Gq-coupled protein, so when the ligand binds, beta-type phospholipase C is activated which creates inositol triphosphate. This then triggers calcium release inside the cell.

See also Prokineticin receptor Kallmann syndrome

References

Illustrations

Worked examples

Example 1 — a first encounter with Prokineticin receptor 2

Start with the simplest possible case. Write down what Prokineticin receptor 2 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 Prokineticin receptor 2 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 Prokineticin receptor 2 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 Prokineticin receptor 2

In research: Prokineticin receptor 2 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 Prokineticin receptor 2 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: Prokineticin receptor 2 is common in secondary-school and first-year university syllabi. It links to neighbouring topics G protein-coupled receptors, Genes on human chromosome 20, Transmembrane receptor stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Prokineticin receptor 2 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 Prokineticin receptor 2 in 20 minutes

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

Frequently asked questions

What is Prokineticin receptor 2 in simple terms?

Prokineticin receptor 2 (PKR2), is a dimeric G protein-coupled receptor encoded by the PROKR2 gene in humans. Function Prokineticins are secreted proteins that can promote angiogenesis and induce strong gastrointestinal smooth muscle contraction.

Why does Prokineticin receptor 2 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 Prokineticin receptor 2?

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 Prokineticin receptor 2.