biology

RE1-silencing transcription factor

RE1-silencing transcription factor 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 RE1-silencing transcription factor rather than just read about it. In short: RE1-Silencing Transcription factor (REST), also known as Neuron-Restrictive Silencer Factor (NRSF), is a protein which in humans is encoded by the REST gene, and acts as a transcriptional repressor. REST is expressly involved in the repression of neural genes in non-neuronal cells.

Key takeaways

RE1-silencing transcription factor belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect RE1-silencing transcription factor to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of RE1-silencing transcription factor from memory before moving on to harder problems.

Reference excerpt

RE1-Silencing Transcription factor (REST), also known as Neuron-Restrictive Silencer Factor (NRSF), is a protein which in humans is encoded by the REST gene, and acts as a transcriptional repressor. REST is expressly involved in the repression of neural genes in non-neuronal cells. Many genetic disorders have been tied to alterations in the REST expression pattern, including colon and small-cell lung carcinomas found with truncated versions of REST. In addition to these cancers, defects in REST have also been attributed a role in Huntington's disease, neuroblastomas, and the effects of epileptic seizures and ischemia.

Function This gene encodes a transcriptional repressor which represses neuronal genes in non-neuronal tissues. It is a member of the Kruppel-type zinc finger transcription factor family. It represses transcription by binding a DNA sequence element called the neuron-restrictive silencer element (NRSE, also known as RE1). The protein is also found in undifferentiated neuronal progenitor cells, and it is thought that this repressor may act as a master negative regulator of neurogenesis. Alternatively spliced transcript variants have been described; however, their full length nature has not been determined. REST is found to be down-regulated in elderly people with Alzheimer's disease. REST contains 8 Cys2His2 zinc fingers and mediates gene repression by recruiting several chromatin-modifying enzymes.

REST is also responsible for ischaemia induced neuronal cell death, in mouse models of brain ischaemia. Ischaemia, which results from reduced blood perfusion of tissues, decreasing nutrient and oxygen supply, induces REST transcription and nuclear accumulation, leading to the epigenetic repression of neuronal genes leading to cell death. The mechanism beyond REST induction in ischaemia, might be tightly linked to its oxygen-dependent nuclear translocation and repression of target genes in hypoxia (low oxygen) where REST fulfils the functions of a master regulator of gene repression in hypoxia.

Interactions RE1-silencing transcription factor has been shown to interact with RCOR1.

References

Illustrations

Worked examples

Example 1 — a first encounter with RE1-silencing transcription factor

Start with the simplest possible case. Write down what RE1-silencing transcription factor 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 RE1-silencing transcription factor 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 RE1-silencing transcription factor 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 RE1-silencing transcription factor

In research: RE1-silencing transcription factor 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 RE1-silencing transcription factor 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: RE1-silencing transcription factor is common in secondary-school and first-year university syllabi. It links to neighbouring topics Genes on human chromosome 4, Transcription factors, so understanding it makes those chapters shorter.
In everyday life: Look for RE1-silencing transcription factor 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 RE1-silencing transcription factor in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what RE1-silencing transcription factor 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 RE1-silencing transcription factor out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is RE1-silencing transcription factor in simple terms?

Why does RE1-silencing transcription factor 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 RE1-silencing transcription factor?

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 RE1-silencing transcription factor.