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S100A3

S100A3 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 S100A3 rather than just read about it. In short: S100 calcium-binding protein A3 (S100A3) is a protein that in humans is encoded by the S100A3 gene. The protein encoded by this gene is a member of the S100 family of proteins containing 2 EF-hand calcium-binding motifs.

S100A3 — main illustration
S100A3 — illustration

Key takeaways

  • S100A3 belongs to biology; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect S100A3 to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of S100A3 from memory before moving on to harder problems.

Reference excerpt

S100 calcium-binding protein A3 (S100A3) is a protein that in humans is encoded by the S100A3 gene. The protein encoded by this gene is a member of the S100 family of proteins containing 2 EF-hand calcium-binding motifs. S100 proteins are localized in the cytoplasm and/or nucleus of a wide range of cells, and involved in the regulation of a number of cellular processes such as cell cycle progression and differentiation. S100 genes include at least 13 members which are located as a cluster on chromosome 1q21. This protein has the highest content of cysteines of all S100 proteins, has a high affinity for Zinc, and is highly expressed in human hair cuticle. The precise function of this protein is unknown.

References

Further reading

Illustrations

S100A3 illustration
S100A3 illustration
S100A3 illustration
S100A3 illustration
S100A3 illustration

Worked examples

Example 1 — a first encounter with S100A3

Start with the simplest possible case. Write down what S100A3 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 S100A3 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 S100A3 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 S100A3

In research
S100A3 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 S100A3 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
S100A3 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Genes on human chromosome 1, Human chromosome 1 gene stubs, S100 proteins, so understanding it makes those chapters shorter.
In everyday life
Look for S100A3 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 S100A3 in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what S100A3 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 S100A3 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is S100A3 in simple terms?

S100 calcium-binding protein A3 (S100A3) is a protein that in humans is encoded by the S100A3 gene. The protein encoded by this gene is a member of the S100 family of proteins containing 2 EF-hand calcium-binding motifs.

Why does S100A3 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 S100A3?

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 S100A3.

Tags

  • Genes on human chromosome 1
  • Human chromosome 1 gene stubs
  • S100 proteins

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