biology

Nuclear pore glycoprotein p62

Nuclear pore glycoprotein p62 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 Nuclear pore glycoprotein p62 rather than just read about it. In short: Nuclear pore glycoprotein p62 is a protein complex associated with the nuclear envelope. The p62 protein remains associated with the nuclear pore complex-lamina fraction. p62 is synthesized as a soluble cytoplasmic precursor of 61 kDa followed by modification that involve addition of N-acetylglucosamine residues, followed by association with other complex proteins.

Key takeaways

Nuclear pore glycoprotein p62 belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Nuclear pore glycoprotein p62 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Nuclear pore glycoprotein p62 from memory before moving on to harder problems.

Reference excerpt

Nuclear pore glycoprotein p62 is a protein complex associated with the nuclear envelope. The p62 protein remains associated with the nuclear pore complex-lamina fraction. p62 is synthesized as a soluble cytoplasmic precursor of 61 kDa followed by modification that involve addition of N-acetylglucosamine residues, followed by association with other complex proteins. In humans it is encoded by the NUP62 gene. The nuclear pore complex is a massive structure that extends across the nuclear envelope, forming a gateway that regulates the flow of macromolecules between the nucleus and the cytoplasm. Nucleoporins are the main components of the nuclear pore complex in eukaryotic cells. The protein encoded by this gene is a member of the FG repeat containing nucleoporins and is localized to the nuclear pore central plug. This protein associates with the importin alpha/beta complex which is involved in the import of proteins containing nuclear localization signals. Multiple transcript variants of this gene encode a single protein isoform.

Structure P62 is a serine/threonine rich protein of ~520 amino acids, with tetrapeptide repeats on the amino terminus and a series of alpha-helical regions with hydrophobic heptad repeats forming beta-propeller domain. P62 assembles into a complex containing 3 addition proteins, p60, p54 and p45 forming the p62 complex of ~235 kDa. O-GlcNAcylation appears to be involved in the assembly and disassembly of p62 into higher order complexes, and a serine/threonine rich linker region between Ser270 to Thr294 appear to be regulatory. The p62 complex is localized to both the nucleoplasmic and cytoplasmic sides of the pore complex and the relative diameter of p62 complex relative to the nuclear pore complex suggests it interacts in pore gating.

Function P62 appears to interact with mRNA during transport out of the nucleus. P62 also interacts with a nuclear transport factor (NTF2) protein that is involved in trafficking proteins between cytoplasm and nucleus. Another protein, importin (beta) binds to the helical rod section of p62, which also binds NTF2 suggesting the formation of a higher order gating complex. Karyopherin beta2 (transportin), a riboprotein transporter also interacts with p62. P62 also interacts with Nup93, and when Nup98 is depleted p62 fails to assemble with nuclear pore complexes. Mutant pores could not dock/transport proteins with nuclear localization signals or M9 import signals.

Pathology Antibodies to p62 complex are involved in one or more autoimmune diseases. P62 glycosylation is increased in diabetes and may influence its association with other diseases. p62 is also more frequent in Stage IV primary biliary cirrhosis and is prognostic for severe disease.

Interactions Nucleoporin 62 has been shown to interact with:

HSF2, KPNB1, NUTF2, TRAF3, and XPO1, Nup93.

References

Illustrations

Worked examples

Example 1 — a first encounter with Nuclear pore glycoprotein p62

Start with the simplest possible case. Write down what Nuclear pore glycoprotein p62 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 Nuclear pore glycoprotein p62 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 Nuclear pore glycoprotein p62 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 Nuclear pore glycoprotein p62

In research: Nuclear pore glycoprotein p62 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 Nuclear pore glycoprotein p62 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: Nuclear pore glycoprotein p62 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Autoantigens, Genes on human chromosome 19, Glycoproteins, so understanding it makes those chapters shorter.
In everyday life: Look for Nuclear pore glycoprotein p62 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 Nuclear pore glycoprotein p62 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Nuclear pore glycoprotein p62 means in your own words.
Compare your version with the excerpt and mark what you missed.
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Frequently asked questions

What is Nuclear pore glycoprotein p62 in simple terms?

Why does Nuclear pore glycoprotein p62 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 Nuclear pore glycoprotein p62?

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 Nuclear pore glycoprotein p62.