biology

PIAS4

PIAS4 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 PIAS4 rather than just read about it. In short: E3 SUMO-protein ligase PIAS4 is one of several protein inhibitor of activated STAT (PIAS) proteins. It is also known as a protein inhibitor of activated STAT protein gamma (PIASg or PIASy), and is an enzyme that in humans is encoded by the PIAS4 gene.

Key takeaways

PIAS4 belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect PIAS4 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of PIAS4 from memory before moving on to harder problems.

Reference excerpt

E3 SUMO-protein ligase PIAS4 is one of several protein inhibitor of activated STAT (PIAS) proteins. It is also known as a protein inhibitor of activated STAT protein gamma (PIASg or PIASy), and is an enzyme that in humans is encoded by the PIAS4 gene.

Interactions PIAS4 has been shown to interact with Mothers against decapentaplegic homolog 6, Mothers against decapentaplegic homolog 7 and Lymphoid enhancer-binding factor 1. PIAS4 has been shown to be responsible for the SUMOylation of inhibited Werner syndrome helicase (WRN) trapped on DNA in microsatellite unstable cancer cells.

References

Illustrations

Worked examples

Example 1 — a first encounter with PIAS4

Start with the simplest possible case. Write down what PIAS4 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 PIAS4 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 PIAS4 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 PIAS4

In research: PIAS4 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 PIAS4 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: PIAS4 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Genes on human chromosome 19, Human chromosome 19 gene stubs, so understanding it makes those chapters shorter.
In everyday life: Look for PIAS4 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 PIAS4 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what PIAS4 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 PIAS4 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is PIAS4 in simple terms?

Why does PIAS4 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 PIAS4?

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 PIAS4.