biology

Monolysocardiolipin acyltransferase

Monolysocardiolipin acyltransferase 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 Monolysocardiolipin acyltransferase rather than just read about it. In short: Monolysocardiolipin acyltransferase (MLCL AT-1) is a mitochondrial acyltransferase that facilitates the remodeling of monolysocardiolipin (MLCL) into cardiolipin. History In 1990, biologists Michael Schlame and Bernd Rustow observed the deacylation of cardiolipin into MLCL, which was then converted back into cardiolipin by a protein using linoleoyl coenzyme A, derived from phosphatidylcholine.

Key takeaways

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

Reference excerpt

Monolysocardiolipin acyltransferase (MLCL AT-1) is a mitochondrial acyltransferase that facilitates the remodeling of monolysocardiolipin (MLCL) into cardiolipin.

History In 1990, biologists Michael Schlame and Bernd Rustow observed the deacylation of cardiolipin into MLCL, which was then converted back into cardiolipin by a protein using linoleoyl coenzyme A, derived from phosphatidylcholine. However, acyltransferase activities involved in the reacylation of MLCL had not been identified or characterized in any mammalian tissue until 1999, by the Hatch lab at the University of Manitoba, in rat heart mitochondria. In 2003, the same lab purified and characterized an MLCL acyltransferase in pig liver mitochondria, and by comparing this protein against a human protein database, they identified a sequenced but uncharacterized human protein as the enzyme responsible in 2009.

Function MLCL AT-1 catalyzes the transfer of the fatty acid chain attached to a coenzyme A molecule to an available hydroxyl group on MLCL, producing cardiolipin. This lipid remodeling is separate from the cardiolipin synthesis pathway, and is essential to maintain its unique unsaturated fatty acyl composition. MLCL AT-1 typically utilizes linoleoyl coenzyme A, preferred to oleoyl coenzyme A, which is preferred to palmitoyl coenzyme A.

Activity during apoptosis MLCL AT-1 activity increases in cells cardiac myoblast cells exposed to 2-deoxyglucose-induced apoptosis. MLCL AT-1 activity also increases in a rat model of spontaneously hypertensive heart failure. Since cardiolipin content is significantly diminished in the inner mitochondrial membrane during apoptosis, the increase of lipid remodeling by MLCL AT-1 may be an effort of the cell to maintain normal cardiolipin levels.

Similarity to mitochondrial trifunctional protein MLCL AT-1 is completely identical to the 59-kDa C-terminal end of mitochondrial trifunctional protein HADHA, suggesting the possibility that the two proteins may be the product of alternative splicing of the same gene. MLCL AT-1 is likely a splice variant of the alpha subunit of MTP.

Hormone interaction Treatment with thyroxine, a thyroid hormone, can produce an almost two-fold increase in MLCL AT-1 activity in rats.

References

Worked examples

Example 1 — a first encounter with Monolysocardiolipin acyltransferase

Start with the simplest possible case. Write down what Monolysocardiolipin acyltransferase 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 Monolysocardiolipin acyltransferase 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 Monolysocardiolipin acyltransferase 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 Monolysocardiolipin acyltransferase

In research: Monolysocardiolipin acyltransferase 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 Monolysocardiolipin acyltransferase 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: Monolysocardiolipin acyltransferase is common in secondary-school and first-year university syllabi. It links to neighbouring topics Enzymes, Genes on human chromosome 2, so understanding it makes those chapters shorter.
In everyday life: Look for Monolysocardiolipin acyltransferase 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 Monolysocardiolipin acyltransferase in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Monolysocardiolipin acyltransferase 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.
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Frequently asked questions

What is Monolysocardiolipin acyltransferase in simple terms?

Monolysocardiolipin acyltransferase (MLCL AT-1) is a mitochondrial acyltransferase that facilitates the remodeling of monolysocardiolipin (MLCL) into cardiolipin. History In 1990, biologists Michael Schlame and Bernd Rustow observed the deacylation of cardiolipin into MLCL, which was then converted…

Why does Monolysocardiolipin acyltransferase 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 Monolysocardiolipin acyltransferase?

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 Monolysocardiolipin acyltransferase.