biology

Retinoid X receptor alpha

Retinoid X receptor alpha 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 Retinoid X receptor alpha rather than just read about it. In short: Retinoid X receptor alpha (RXR-alpha), also known as NR2B1 (nuclear receptor subfamily 2, group B, member 1) is a nuclear receptor that in humans is encoded by the RXRA gene. Function Retinoid X receptors (RXRs) are nuclear receptors which form heterodimers with many different nuclear receptors, allowing them to bind to specific sequences in the promoters of target genes and regulate their transcription.

Key takeaways

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

Reference excerpt

Retinoid X receptor alpha (RXR-alpha), also known as NR2B1 (nuclear receptor subfamily 2, group B, member 1) is a nuclear receptor that in humans is encoded by the RXRA gene.

Function Retinoid X receptors (RXRs) are nuclear receptors which form heterodimers with many different nuclear receptors, allowing them to bind to specific sequences in the promoters of target genes and regulate their transcription. For example, RXRA combines with the retinoic acid receptors RARA and RARB, allowing them to mediate the biological effects of retinoids, and in particular enabling retinoic acid-mediated gene activation. In the absence of ligand, the RXR-RAR heterodimers associate with a multiprotein complex containing transcription corepressors that induce histone deacetylation, chromatin condensation and transcriptional suppression. After ligand binding, the corepressors dissociate from the receptors and associate with the coactivators leading to transcriptional activation. Aside from RARs, RXRA is also known to bind to PPARA, and the RXRA/PPARA heterodimer is required for PPARA transcriptional activity on fatty acid oxidation genes such as ACOX1 and the cytochrome P450 system genes.

Interactive pathway map

Interactions Retinoid X receptor alpha has been shown to interact with:

Nuclear Receptor Heterodimeric Partners

Other Transcription Factors

Transcription Coactivators

Others Proteins

Illustrations

Worked examples

Example 1 — a first encounter with Retinoid X receptor alpha

Start with the simplest possible case. Write down what Retinoid X receptor alpha 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 Retinoid X receptor alpha 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 Retinoid X receptor alpha 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 Retinoid X receptor alpha

In research: Retinoid X receptor alpha 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 Retinoid X receptor alpha 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: Retinoid X receptor alpha is common in secondary-school and first-year university syllabi. It links to neighbouring topics Genes on human chromosome 9, Intracellular receptors, Transcription factors, so understanding it makes those chapters shorter.
In everyday life: Look for Retinoid X receptor alpha 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 Retinoid X receptor alpha in 20 minutes

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

Frequently asked questions

What is Retinoid X receptor alpha in simple terms?

Retinoid X receptor alpha (RXR-alpha), also known as NR2B1 (nuclear receptor subfamily 2, group B, member 1) is a nuclear receptor that in humans is encoded by the RXRA gene. Function Retinoid X receptors (RXRs) are nuclear receptors which form heterodimers with many different nuclear receptors, al…

Why does Retinoid X receptor alpha 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 Retinoid X receptor alpha?

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 Retinoid X receptor alpha.