biology

MAGEL2

MAGEL2 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 MAGEL2 rather than just read about it. In short: MAGE family member L2 (MAGEL2) is a protein that in human is encoded by the MAGEL2 gene. This protein is a ubuquitin ligase enhancer which is necessary for endsomal protein recycling.

Key takeaways

MAGEL2 belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect MAGEL2 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of MAGEL2 from memory before moving on to harder problems.

Reference excerpt

MAGE family member L2 (MAGEL2) is a protein that in human is encoded by the MAGEL2 gene. This protein is a ubuquitin ligase enhancer which is necessary for endsomal protein recycling. This protein is a part of MUST complex (which consists of MAGEL2-USP7-TRIM27 complex).

Gene The MAGEL2 gene is located on the long(q) arm of chromosome 15 on position 11.2, from base pair 23,643,549 to base pair 23,647,867. This gene is expressed from the paternal chromosome 15.

Function This protein is known to regulate AMPA receptors in hypothalamus. Also it can regualte secretion of hormones such as: oxytocin, arginine vasopressin, somatostatin, TSH, somatotropin, LH. Loss of that protein showed decreased neuoronal activity in hypothalamus and hippocampus of mice via AMPA receptor trafficking defects, consequently neuronal activity gets disrupted and synaptic excitation/inhibition balance is lost. MAGEL2 is required for balance of serotonin, dopamine and noradrenaline concentrations, in Magel2-null mice concentrations of that neurotransmitters had been decreased. As mentioned above MAGEL2 participates in MUST complex, which promotes endosomal F-actin polymerization.

Clinical significance

Prader-Willi syndrome Prader-Willi syndrome (PWS) is a rare genetic disorder that is caused by maternal UPD(15) or deletions/epimutations on paternal chromosome 15. PWS can cause variety of symptoms from hypotoniain infancy to behavioural problems in early childhood. Some symptoms can be found in infants aside from hypotonia, are a poor eye coordination, almond-shaped eyes, thin upper lip, also, due to hypotonia, problems with sucking reflex. Their cries are weak and they have difficulty of waking up. Deletion of MAGEL2 (and other genes that are located on the same region) contributes to symptoms in PWS.

Schaaf-Yang syndrome

Schaaf-Yang syndrome (SYS) is a rare genetic disorder that is caused by a mutation in a paternally expressed gene MAGEL2. The signs of this disease are: hypotonia, developmental delay and contractures of joints, also another signs of that disease are unique facial features, small hands, problems with eye and short stature. As mentioned above, SYS is caused by LoF variants of the paternal copy of MAGEL2.

References

Illustrations

Worked examples

Example 1 — a first encounter with MAGEL2

Start with the simplest possible case. Write down what MAGEL2 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 MAGEL2 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 MAGEL2 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 MAGEL2

In research: MAGEL2 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 MAGEL2 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: MAGEL2 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Genes on human chromosome 15, Human genetics, Human proteins, so understanding it makes those chapters shorter.
In everyday life: Look for MAGEL2 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 MAGEL2 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what MAGEL2 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 MAGEL2 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is MAGEL2 in simple terms?

MAGE family member L2 (MAGEL2) is a protein that in human is encoded by the MAGEL2 gene. This protein is a ubuquitin ligase enhancer which is necessary for endsomal protein recycling.

Why does MAGEL2 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 MAGEL2?

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 MAGEL2.