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biology

VPS25

VPS25 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 VPS25 rather than just read about it. In short: Vacuolar protein-sorting-associated protein 25 is a protein that in humans is encoded by the VPS25 gene. It is a component of the endosome-associated complex ESCRT-II (Endosomal Sorting Complexes Required for Transport protein II).

VPS25 — main illustration
VPS25 — illustration

Key takeaways

  • VPS25 belongs to biology; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect VPS25 to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of VPS25 from memory before moving on to harder problems.

Reference excerpt

Vacuolar protein-sorting-associated protein 25 is a protein that in humans is encoded by the VPS25 gene. It is a component of the endosome-associated complex ESCRT-II (Endosomal Sorting Complexes Required for Transport protein II). ESCRT (ESCRT-I, -II, -III) complexes orchestrate efficient sorting of ubiquitinated transmembrane receptors to lysosomes via multivesicular bodies (MVBs). ESCRT-II recruits the transport machinery for protein sorting at MVB. In addition, the human ESCRT-II has been shown to form a complex with RNA polymerase II elongation factor ELL in order to exert transcriptional control activity. ESCRT-II transiently associates with the endosomal membrane and thereby initiates the formation of ESCRT-III, a membrane-associated protein complex that functions immediately downstream of ESCRT-II during sorting of MVB cargo. ESCRT-II in turn functions downstream of ESCRT-I, a protein complex that binds to ubiquitinated endosomal cargo. ESCRT-II is a trilobal complex composed of two copies of vps25, one copy of vps22 and the C-terminal region of vps36. The crystal structure of vps25 revealed two winged-helix domains, the N-terminal domain of vps25 interacting with vps22 and vps36.

References

Further reading

Illustrations

VPS25 illustration
VPS25 illustration
VPS25 illustration
VPS25 illustration
VPS25 illustration

Worked examples

Example 1 — a first encounter with VPS25

Start with the simplest possible case. Write down what VPS25 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 VPS25 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 VPS25 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 VPS25

In research
VPS25 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 VPS25 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
VPS25 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Genes on human chromosome 17, Human chromosome 17 gene stubs, Protein families, so understanding it makes those chapters shorter.
In everyday life
Look for VPS25 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 VPS25 in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what VPS25 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 VPS25 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is VPS25 in simple terms?

Vacuolar protein-sorting-associated protein 25 is a protein that in humans is encoded by the VPS25 gene. It is a component of the endosome-associated complex ESCRT-II (Endosomal Sorting Complexes Required for Transport protein II).

Why does VPS25 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 VPS25?

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 VPS25.

Tags

  • Genes on human chromosome 17
  • Human chromosome 17 gene stubs
  • Protein families

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