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biology

OPA3

OPA3 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 OPA3 rather than just read about it. In short: Optic atrophy 3 protein is a protein that in humans is encoded by the OPA3 gene. Clinical significance Costeff syndrome, or 3-methylglutaconic aciduria type III, is a genetic disorder caused by mutations in the OPA3 gene.

OPA3 — main illustration
OPA3 — illustration

Key takeaways

  • OPA3 belongs to biology; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect OPA3 to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of OPA3 from memory before moving on to harder problems.

Reference excerpt

Optic atrophy 3 protein is a protein that in humans is encoded by the OPA3 gene.

Clinical significance Costeff syndrome, or 3-methylglutaconic aciduria type III, is a genetic disorder caused by mutations in the OPA3 gene. In addition these mutations disrupt the production of non-shivering heat, as indicated by the dramatic decrease in surface body temperature.

See also 3-Methylglutaconic aciduria

References

Further reading

External links GeneReviews/NCBI/NIH/UW entry on 3-Methylglutaconic Aciduria Type 3 OMIM entries on 3-Methylglutaconic Aciduria Type 3

Illustrations

OPA3 illustration
OPA3 illustration
OPA3 illustration
OPA3 illustration
OPA3 illustration

Worked examples

Example 1 — a first encounter with OPA3

Start with the simplest possible case. Write down what OPA3 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 OPA3 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 OPA3 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 OPA3

In research
OPA3 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 OPA3 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
OPA3 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 OPA3 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 OPA3 in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what OPA3 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 OPA3 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is OPA3 in simple terms?

Optic atrophy 3 protein is a protein that in humans is encoded by the OPA3 gene. Clinical significance Costeff syndrome, or 3-methylglutaconic aciduria type III, is a genetic disorder caused by mutations in the OPA3 gene.

Why does OPA3 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 OPA3?

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 OPA3.

Tags

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

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