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PTP4A1

PTP4A1 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 PTP4A1 rather than just read about it. In short: Protein tyrosine phosphatase type IVA 1 is an enzyme that in humans is encoded by the PTP4A1 gene. The protein encoded by this gene belongs to a small class of prenylated protein tyrosine phosphatases (PTPs), which contains a PTP domain and a characteristic C-terminal prenylation motif.

PTP4A1 — main illustration
PTP4A1 — illustration

Key takeaways

  • PTP4A1 belongs to biology; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect PTP4A1 to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of PTP4A1 from memory before moving on to harder problems.

Reference excerpt

Protein tyrosine phosphatase type IVA 1 is an enzyme that in humans is encoded by the PTP4A1 gene. The protein encoded by this gene belongs to a small class of prenylated protein tyrosine phosphatases (PTPs), which contains a PTP domain and a characteristic C-terminal prenylation motif. PTPs are cell signaling molecules that play regulatory roles in a variety of cellular processes. This tyrosine phosphatase is a nuclear protein, but may primarily associate with plasma membrane. The surface membrane association of this protein depends on its C-terminal prenylation. Overexpression of this gene in mammalian cells conferred a transformed phenotype, which implicated its role in the tumorigenesis. Studies in rat suggested that this gene may be an immediate-early gene in mitogen-stimulated cells.

Interactions PTP4A1 has been shown to interact with ATF7.

References

Further reading

Illustrations

PTP4A1 illustration
PTP4A1 illustration
PTP4A1 illustration
PTP4A1 illustration
PTP4A1 illustration

Worked examples

Example 1 — a first encounter with PTP4A1

Start with the simplest possible case. Write down what PTP4A1 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 PTP4A1 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 PTP4A1 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 PTP4A1

In research
PTP4A1 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 PTP4A1 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
PTP4A1 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Genes on human chromosome 6, Human chromosome 6 gene stubs, so understanding it makes those chapters shorter.
In everyday life
Look for PTP4A1 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 PTP4A1 in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what PTP4A1 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 PTP4A1 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is PTP4A1 in simple terms?

Protein tyrosine phosphatase type IVA 1 is an enzyme that in humans is encoded by the PTP4A1 gene. The protein encoded by this gene belongs to a small class of prenylated protein tyrosine phosphatases (PTPs), which contains a PTP domain and a characteristic C-terminal prenylation motif.

Why does PTP4A1 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 PTP4A1?

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 PTP4A1.

Tags

  • Genes on human chromosome 6
  • Human chromosome 6 gene stubs

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