engineering

Phospholipid-hydroperoxide glutathione peroxidase

Phospholipid-hydroperoxide glutathione peroxidase is a engineering 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 Phospholipid-hydroperoxide glutathione peroxidase rather than just read about it. In short: In enzymology, a phospholipid-hydroperoxide glutathione peroxidase (EC 1.11.1.12) is an enzyme that catalyzes the chemical reaction 2 glutathione + a lipid hydroperoxide ⇌ {\displaystyle \rightleftharpoons } glutathione disulfide + lipid + 2 H2O Thus, the two substrates of this enzyme are glutathione and lipid hydroperoxide, whereas its 3 products are glutathione disulfide, lipid, and H2O. This enzyme belongs to the…

Key takeaways

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

Reference excerpt

In enzymology, a phospholipid-hydroperoxide glutathione peroxidase (EC 1.11.1.12) is an enzyme that catalyzes the chemical reaction

2 glutathione + a lipid hydroperoxide ⇌ {\displaystyle \rightleftharpoons } glutathione disulfide + lipid + 2 H2O Thus, the two substrates of this enzyme are glutathione and lipid hydroperoxide, whereas its 3 products are glutathione disulfide, lipid, and H2O. This enzyme belongs to the family of oxidoreductases, to be specific those acting on a peroxide as acceptor (peroxidases). The systematic name of this enzyme class is glutathione:lipid-hydroperoxide oxidoreductase. Other names in common use include peroxidation-inhibiting protein, PHGPX, peroxidation-inhibiting protein: peroxidase, glutathione, (phospholipid hydroperoxide-reducing), phospholipid hydroperoxide glutathione peroxidase, hydroperoxide glutathione peroxidase, or glutathione peroxidase 4 (GPX4). This enzyme participates in glutathione metabolism.

Structural studies As of late 2007, two structures have been solved for this class of enzymes, with PDB accession codes PDB: 2GS3 and PDB: 2OBI.

References

Ursini F, Maiorino M, Gregolin C (1985). "The selenoenzyme phospholipid hydroperoxide glutathione peroxidase". Biochim. Biophys. Acta. 839 (1): 62–70. doi:10.1016/0304-4165(85)90182-5. PMID 3978121.

Worked examples

Example 1 — a first encounter with Phospholipid-hydroperoxide glutathione peroxidase

Start with the simplest possible case. Write down what Phospholipid-hydroperoxide glutathione peroxidase claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, 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 Phospholipid-hydroperoxide glutathione peroxidase 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 Phospholipid-hydroperoxide glutathione peroxidase 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 Phospholipid-hydroperoxide glutathione peroxidase

In research: Phospholipid-hydroperoxide glutathione peroxidase appears in engineering 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 Phospholipid-hydroperoxide glutathione peroxidase 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: Phospholipid-hydroperoxide glutathione peroxidase is common in secondary-school and first-year university syllabi. It links to neighbouring topics EC 1.11.1, Enzymes of known structure, Oxidoreductase stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Phospholipid-hydroperoxide glutathione peroxidase 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Phospholipid-hydroperoxide glutathione peroxidase” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Phospholipid-hydroperoxide glutathione peroxidase in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Phospholipid-hydroperoxide glutathione peroxidase 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 Phospholipid-hydroperoxide glutathione peroxidase out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Phospholipid-hydroperoxide glutathione peroxidase in simple terms?

In enzymology, a phospholipid-hydroperoxide glutathione peroxidase (EC 1.11.1.12) is an enzyme that catalyzes the chemical reaction 2 glutathione + a lipid hydroperoxide ⇌ {\displaystyle \rightleftharpoons } glutathione disulfide + lipid + 2 H2O Thus, the two substrates of this enzyme are glutathio…

Why does Phospholipid-hydroperoxide glutathione peroxidase matter?

Because it connects several engineering 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 Phospholipid-hydroperoxide glutathione peroxidase?

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 Phospholipid-hydroperoxide glutathione peroxidase.