science

Ure2

Ure2 is a science 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 Ure2 rather than just read about it. In short: Ure2, or Ure2p, is a yeast protein encoded by a gene known as URE2 (systematic designation YNL229C). The Ure2 protein can also form a yeast prion known as [URE3].

Key takeaways

Ure2 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Ure2 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Ure2 from memory before moving on to harder problems.

Reference excerpt

Ure2, or Ure2p, is a yeast protein encoded by a gene known as URE2 (systematic designation YNL229C). The Ure2 protein can also form a yeast prion known as [URE3]. When Ura2p is expressed at high levels in yeast, it will readily convert from its native protein conformation into an aggregate known as an amyloid. [URE3], along with [PSI+], were both determined by Wickner (1994) to meet the genetic definition of a yeast prion. The gene prefix "URE" stands for ureidosuccinate transport, as the Ure2 protein in its native state is responsible for repressing nitrogen catabolism of glutamine by controlling the GLN3 transcription factor. Gln3p is retained in the cytoplasm by Ure2p when a preferred nitrogen source like ammonium sulfate is present in the growth media, but enters the nucleus when the cells are shifted to a nonpreferred source of nitrogen such as proline. Ure2 protein also plays a role in responding to oxidative stress. Ure2p is a protein composed of 354 amino acids and has a molecular weight of 40,226. Its gene, URE2, been mapped to chromosome XIV, 5 map units from KEX2.

References

External links URE2 at the Saccharomyces Genome Database

Worked examples

Example 1 — a first encounter with Ure2

Start with the simplest possible case. Write down what Ure2 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Ure2 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 Ure2 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 Ure2

In research: Ure2 appears in science 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 Ure2 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: Ure2 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bacteriology, Digestive system, so understanding it makes those chapters shorter.
In everyday life: Look for Ure2 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 Ure2 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Ure2 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 Ure2 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Ure2 in simple terms?

Ure2, or Ure2p, is a yeast protein encoded by a gene known as URE2 (systematic designation YNL229C). The Ure2 protein can also form a yeast prion known as [URE3].

Why does Ure2 matter?

Because it connects several science 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 Ure2?

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 Ure2.