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biology

PARD3

PARD3 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 PARD3 rather than just read about it. In short: Partitioning defective 3 homolog is a protein that in humans is encoded by the PARD3 gene. Function PARD proteins, which were first identified in C. elegans, are essential for asymmetric cell division and polarized growth, whereas CDC42 (MIM 116952) mediates the establishment of cell polarity.

PARD3 — main illustration
PARD3 — illustration

Key takeaways

  • PARD3 belongs to biology; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect PARD3 to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of PARD3 from memory before moving on to harder problems.

Reference excerpt

Partitioning defective 3 homolog is a protein that in humans is encoded by the PARD3 gene.

Function PARD proteins, which were first identified in C. elegans, are essential for asymmetric cell division and polarized growth, whereas CDC42 (MIM 116952) mediates the establishment of cell polarity. The CDC42 GTPase, which is controlled by nucleotide exchange factors (GEFs; see MIM 606057) and GTPase-activating proteins (GAPs; see MIM 604980), interacts with a large set of effector proteins that typically contain a CDC42/RAC (MIM 602048)-interactive binding (CRIB) domain.[supplied by OMIM]

Interactions PARD3 has been shown to interact with:

JAM2, JAM3, PRKCI, and PVRL3.

References

Further reading

Illustrations

PARD3 illustration
PARD3 illustration
PARD3 illustration
PARD3 illustration
PARD3 illustration

Worked examples

Example 1 — a first encounter with PARD3

Start with the simplest possible case. Write down what PARD3 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 PARD3 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 PARD3 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 PARD3

In research
PARD3 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 PARD3 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
PARD3 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Genes on human chromosome 10, Human chromosome 10 gene stubs, so understanding it makes those chapters shorter.
In everyday life
Look for PARD3 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 PARD3 in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what PARD3 means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain PARD3 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is PARD3 in simple terms?

Partitioning defective 3 homolog is a protein that in humans is encoded by the PARD3 gene. Function PARD proteins, which were first identified in C. elegans, are essential for asymmetric cell division and polarized growth, whereas CDC42 (MIM 116952) mediates the establishment of cell polarity.

Why does PARD3 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 PARD3?

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 PARD3.

Tags

  • Genes on human chromosome 10
  • Human chromosome 10 gene stubs

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