biology

GYF domain

GYF domain 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 GYF domain rather than just read about it. In short: In molecular biology, the GYF domain (glycine-tyrosine-phenylalanine domain) is an approximately 60-amino acid protein domain which contains a conserved GP[YF]xxxx[MV]xxWxxx[GN]YF motif. It was identified in the human intracellular protein termed CD2 binding protein 2 (CD2BP2), which binds to a site containing two tandem PPPGHR segments within the cytoplasmic region of CD2.

Key takeaways

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

Reference excerpt

In molecular biology, the GYF domain (glycine-tyrosine-phenylalanine domain) is an approximately 60-amino acid protein domain which contains a conserved GP[YF]xxxx[MV]xxWxxx[GN]YF motif. It was identified in the human intracellular protein termed CD2 binding protein 2 (CD2BP2), which binds to a site containing two tandem PPPGHR segments within the cytoplasmic region of CD2. Binding experiments and mutational analyses have demonstrated the critical importance of the GYF tripeptide in ligand binding. A GYF domain is also found in several other eukaryotic proteins of unknown function. It has been proposed that the GYF domain found in these proteins could also be involved in proline-rich sequence recognition. Resolution of the structure of the CD2BP2 GYF domain by NMR spectroscopy revealed a compact domain with a beta-beta-alpha-beta-beta topology, where the single alpha-helix is tilted away from the twisted, anti-parallel beta-sheet. The conserved residues of the GYF domain create a contiguous patch of predominantly hydrophobic nature which forms an integral part of the ligand-binding site. There is limited homology within the C-terminal 20-30 amino acids of various GYF domains, supporting the idea that this part of the domain is structurally but not functionally important.

References

External links Eukaryotic Linear Motif resource motif class LIG_GYF

Illustrations

Worked examples

Example 1 — a first encounter with GYF domain

Start with the simplest possible case. Write down what GYF domain 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 GYF domain 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 GYF domain 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 GYF domain

In research: GYF domain 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 GYF domain 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: GYF domain is common in secondary-school and first-year university syllabi. It links to neighbouring topics Protein domains, so understanding it makes those chapters shorter.
In everyday life: Look for GYF domain 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 GYF domain in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what GYF domain means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain GYF domain out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is GYF domain in simple terms?

Why does GYF domain 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 GYF domain?

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 GYF domain.