biology

Isocitrate/isopropylmalate dehydrogenase family

Isocitrate/isopropylmalate dehydrogenase family 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 Isocitrate/isopropylmalate dehydrogenase family rather than just read about it. In short: In molecular biology, the isocitrate/isopropylmalate dehydrogenase family is a protein family consisting of the evolutionary related enzymes isocitrate dehydrogenase, 3-isopropylmalate dehydrogenase and tartrate dehydrogenase. Isocitrate dehydrogenase (IDH), is an important enzyme of carbohydrate metabolism which catalyses the oxidative decarboxylation of isocitrate into alpha-ketoglutarate.

Key takeaways

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

Reference excerpt

In molecular biology, the isocitrate/isopropylmalate dehydrogenase family is a protein family consisting of the evolutionary related enzymes isocitrate dehydrogenase, 3-isopropylmalate dehydrogenase and tartrate dehydrogenase. Isocitrate dehydrogenase (IDH), is an important enzyme of carbohydrate metabolism which catalyses the oxidative decarboxylation of isocitrate into alpha-ketoglutarate. IDH is either dependent on NAD+ EC 1.1.1.41 or on NADP+ EC 1.1.1.42. In eukaryotes there are at least three isozymes of IDH: two are located in the mitochondrial matrix (one NAD+-dependent, the other NADP+-dependent), while the third one (also NADP+-dependent) is cytoplasmic. In Escherichia coli the activity of a NADP+-dependent form of the enzyme is controlled by the phosphorylation of a serine residue; the phosphorylated form of IDH is completely inactivated. 3-isopropylmalate dehydrogenase EC 1.1.1.85 (IMDH) catalyses the third step in the biosynthesis of leucine in bacteria and fungi, the oxidative decarboxylation of 3-isopropylmalate into 2-oxo-4-methylvalerate. Tartrate dehydrogenase EC 1.1.1.93 catalyses the reduction of tartrate to oxaloglycolate.

References

Illustrations

Worked examples

Example 1 — a first encounter with Isocitrate/isopropylmalate dehydrogenase family

Start with the simplest possible case. Write down what Isocitrate/isopropylmalate dehydrogenase family 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 Isocitrate/isopropylmalate dehydrogenase family 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 Isocitrate/isopropylmalate dehydrogenase family 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 Isocitrate/isopropylmalate dehydrogenase family

In research: Isocitrate/isopropylmalate dehydrogenase family 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 Isocitrate/isopropylmalate dehydrogenase family 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: Isocitrate/isopropylmalate dehydrogenase family 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 Isocitrate/isopropylmalate dehydrogenase family 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 Isocitrate/isopropylmalate dehydrogenase family in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Isocitrate/isopropylmalate dehydrogenase family means in your own words.
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Work through the three examples above with pen and paper.
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Frequently asked questions

What is Isocitrate/isopropylmalate dehydrogenase family in simple terms?

Why does Isocitrate/isopropylmalate dehydrogenase family 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 Isocitrate/isopropylmalate dehydrogenase family?

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 Isocitrate/isopropylmalate dehydrogenase family.