engineering

Hydrogensulfite reductase

Hydrogensulfite reductase 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 Hydrogensulfite reductase rather than just read about it. In short: In enzymology, a hydrogensulfite reductase (EC 1.8.99.3) is an enzyme that catalyzes the chemical reaction trithionate + acceptor + 2 H2O + OH- ⇌ {\displaystyle \rightleftharpoons } 3 bisulfite + reduced acceptor The 4 substrates of this enzyme are trithionate, acceptor, H2O, and OH-, whereas its two products are bisulfite and reduced acceptor. This enzyme belongs to the family of oxidoreductases, specifically those…

Key takeaways

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

Reference excerpt

In enzymology, a hydrogensulfite reductase (EC 1.8.99.3) is an enzyme that catalyzes the chemical reaction

trithionate + acceptor + 2 H2O + OH- ⇌ {\displaystyle \rightleftharpoons } 3 bisulfite + reduced acceptor The 4 substrates of this enzyme are trithionate, acceptor, H2O, and OH-, whereas its two products are bisulfite and reduced acceptor. This enzyme belongs to the family of oxidoreductases, specifically those acting on a sulfur group of donors with other acceptors. The systematic name of this enzyme class is trithionate:acceptor oxidoreductase. Other names in common use include bisulfite reductase, dissimilatory sulfite reductase, desulfoviridin, desulforubidin, desulfofuscidin, dissimilatory-type sulfite reductase, and trithionate:(acceptor) oxidoreductase. It has 4 cofactors: iron, sulfur, siroheme, and iron-sulfur.

References

Hatchikian EC, Zeikus JG (1983). "Characterization of a new type of dissimilatory sulfite reductase present in Thermodesulfobacterium commune". J. Bacteriol. 153 (3): 1211–20. doi:10.1128/jb.153.3.1211-1220.1983. PMC 221765. PMID 6826522. Lee JP, Yi CS, LeGall J, Peck HD Jr (1973). "Isolation of a new pigment, desulforubidin, from Desulfovibrio desulfuricans (Norway strain) and its role in sulfite reduction". J. Bacteriol. 115 (1): 453–5. doi:10.1128/jb.115.1.453-455.1973. PMC 246260. PMID 4717523. Trudinger PA (1970). "Carbon monoxide-reacting pigment from Desulfotomaculum nigrificans and its possible relevance to sulfite reduction". J. Bacteriol. 104 (1): 158–70. doi:10.1128/jb.104.1.158-170.1970. PMC 248196. PMID 5473884.

Worked examples

Example 1 — a first encounter with Hydrogensulfite reductase

Start with the simplest possible case. Write down what Hydrogensulfite reductase 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 Hydrogensulfite reductase 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 Hydrogensulfite reductase 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 Hydrogensulfite reductase

In research: Hydrogensulfite reductase 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 Hydrogensulfite reductase 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: Hydrogensulfite reductase is common in secondary-school and first-year university syllabi. It links to neighbouring topics EC 1.8.99, Enzymes of unknown structure, Iron-sulfur enzymes, so understanding it makes those chapters shorter.
In everyday life: Look for Hydrogensulfite reductase 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 Hydrogensulfite reductase in 20 minutes

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

Frequently asked questions

What is Hydrogensulfite reductase in simple terms?

In enzymology, a hydrogensulfite reductase (EC 1.8.99.3) is an enzyme that catalyzes the chemical reaction trithionate + acceptor + 2 H2O + OH- ⇌ {\displaystyle \rightleftharpoons } 3 bisulfite + reduced acceptor The 4 substrates of this enzyme are trithionate, acceptor, H2O, and OH-, whereas its t…

Why does Hydrogensulfite reductase 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 Hydrogensulfite reductase?

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 Hydrogensulfite reductase.