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RAB8A

RAB8A 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 RAB8A rather than just read about it. In short: Ras-related protein Rab-8A is a protein that in humans is encoded by the RAB8A gene. Function The protein encoded by this gene is a member of the RAS superfamily which are small GTP/GDP-binding proteins with an average size of 200 amino acids.

RAB8A — main illustration
RAB8A — illustration

Key takeaways

  • RAB8A belongs to biology; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect RAB8A to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of RAB8A from memory before moving on to harder problems.

Reference excerpt

Ras-related protein Rab-8A is a protein that in humans is encoded by the RAB8A gene.

Function The protein encoded by this gene is a member of the RAS superfamily which are small GTP/GDP-binding proteins with an average size of 200 amino acids. The RAS-related proteins of the RAB/YPT family may play a role in the transport of proteins from the endoplasmic reticulum to the Golgi and the plasma membrane. This protein shares 97%, 96%, and 51% similarity with the dog RAB8, mouse MEL, and mouse YPT1 proteins, respectively and contains the 4 GTP/GDP-binding sites that are present in all the RAS proteins. The putative effector-binding site of this protein is similar to that of the RAB/YPT proteins. However, this protein contains a C-terminal CAAX motif that is characteristic of many RAS superfamily members but which is not found in YPT1 and the majority of RAB proteins. Although this gene was isolated as a transforming gene from a melanoma cell line, no link between MEL and melanoma has been demonstrated. This oncogene is located 800 kb distal to MY09B on chromosome 19p13.1.

Interactions RAB8A has been shown to interact with Optineurin and MAP4K2.

References

Further reading

Illustrations

RAB8A illustration
RAB8A illustration
RAB8A illustration
RAB8A illustration
RAB8A illustration

Worked examples

Example 1 — a first encounter with RAB8A

Start with the simplest possible case. Write down what RAB8A 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 RAB8A 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 RAB8A 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 RAB8A

In research
RAB8A 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 RAB8A 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
RAB8A 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 RAB8A 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 RAB8A in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what RAB8A 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 RAB8A out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is RAB8A in simple terms?

Ras-related protein Rab-8A is a protein that in humans is encoded by the RAB8A gene. Function The protein encoded by this gene is a member of the RAS superfamily which are small GTP/GDP-binding proteins with an average size of 200 amino acids.

Why does RAB8A 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 RAB8A?

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 RAB8A.

Tags

  • Genes on human chromosome 19
  • Human chromosome 19 gene stubs

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