biology

PARD6A

PARD6A 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 PARD6A rather than just read about it. In short: Partitioning defective 6 homolog alpha is a protein that in humans is encoded by the PARD6A gene. Function This gene is a member of the PAR6 family and encodes a protein with a PSD95/Discs-large/ZO1 (PDZ) domain and a semi-Cdc42/Rac interactive binding (CRIB) domain.

Key takeaways

PARD6A belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect PARD6A to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of PARD6A from memory before moving on to harder problems.

Reference excerpt

Partitioning defective 6 homolog alpha is a protein that in humans is encoded by the PARD6A gene.

Function This gene is a member of the PAR6 family and encodes a protein with a PSD95/Discs-large/ZO1 (PDZ) domain and a semi-Cdc42/Rac interactive binding (CRIB) domain. This cell membrane protein is involved in asymmetrical cell division and cell polarization processes as a member of a multi-protein complex. The protein also has a role in the epithelial-to-mesenchymal transition (EMT) that characterizes the invasive phenotype associated with metastatic carcinomas. Alternate transcriptional splice variants, encoding different isoforms, have been characterized. A recent study shows that Par6 associates with PKC-ι but not with PKC-zeta in melanoma. Oncogenic PKC-iota can promote melanoma cell invasion by up-regulating PKC-ι/Par6 pathway during EMT. PKC-ι inhibition or knockdown resulted an increase E-cadherin and RhoA levels while decreasing total Vimentin, phophorylated Vimentin (S39) and Par6 in metastatic melanoma cells. These results suggested that PKC-ι is involved in signaling pathways which upregulate EMT in melanoma.

Interactions PARD6A has been shown to interact with:

CDC42, ECT2 Protein kinase Mζ, and RAC1. Protein kinase C-ι.

References

Illustrations

Worked examples

Example 1 — a first encounter with PARD6A

Start with the simplest possible case. Write down what PARD6A 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 PARD6A 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 PARD6A 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 PARD6A

In research: PARD6A 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 PARD6A 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: PARD6A is common in secondary-school and first-year university syllabi. It links to neighbouring topics Genes on human chromosome 16, Human chromosome 16 gene stubs, so understanding it makes those chapters shorter.
In everyday life: Look for PARD6A 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 PARD6A in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what PARD6A 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 PARD6A out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is PARD6A in simple terms?

Partitioning defective 6 homolog alpha is a protein that in humans is encoded by the PARD6A gene. Function This gene is a member of the PAR6 family and encodes a protein with a PSD95/Discs-large/ZO1 (PDZ) domain and a semi-Cdc42/Rac interactive binding (CRIB) domain.

Why does PARD6A 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 PARD6A?

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 PARD6A.