engineering

Vitamin B12-transporting ATPase

Vitamin B12-transporting ATPase 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 Vitamin B12-transporting ATPase rather than just read about it. In short: In enzymology, a vitamin B12-transporting ATPase (EC 3.6.3.33) is an enzyme that catalyzes the chemical reaction ATP + H2O + vitamin B12out ⇌ {\displaystyle \rightleftharpoons } ADP + phosphate + vitamin B12in The 3 substrates of this enzyme are ATP, H2O, and vitamin B12, whereas its 3 products are ADP, phosphate, and vitamin B12. This enzyme belongs to the family of hydrolases, specifically those acting on acid anh…

Key takeaways

Vitamin B12-transporting ATPase belongs to engineering; place it in that map before memorising details.
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Connect Vitamin B12-transporting ATPase to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Vitamin B12-transporting ATPase from memory before moving on to harder problems.

Reference excerpt

In enzymology, a vitamin B12-transporting ATPase (EC 3.6.3.33) is an enzyme that catalyzes the chemical reaction

ATP + H2O + vitamin B12out ⇌ {\displaystyle \rightleftharpoons } ADP + phosphate + vitamin B12in The 3 substrates of this enzyme are ATP, H2O, and vitamin B12, whereas its 3 products are ADP, phosphate, and vitamin B12. This enzyme belongs to the family of hydrolases, specifically those acting on acid anhydrides to catalyse transmembrane movement of substances. The systematic name of this enzyme class is ATP phosphohydrolase (vitamin B12-importing). This enzyme participates in abc transporters - general.

Structural studies As of late 2007, two structures have been solved for this class of enzymes, with PDB accession codes PDB: 1L7V and PDB: 2QI9.

References

Kuan G, Dassa E, Saurin W, Hofnung M, Saier MH (1995). "Phylogenetic analyses of the ATP-binding constituents of bacterial extracytoplasmic receptor-dependent ABC-type nutrient uptake permeases". Res. Microbiol. 146 (4): 271–8. doi:10.1016/0923-2508(96)81050-3. PMID 7569321. Saier MH Jr (1998). "Molecular phylogeny as a basis for the classification of transport proteins from bacteria, archaea and eukarya". Adv. Microb. Physiol. Advances in Microbial Physiology. 40: 81–136. doi:10.1016/S0065-2911(08)60130-7. ISBN 978-0-12-027740-7. PMID 9889977.{{cite journal}}: CS1 maint: periodical has ISBN (link) Friedrich MJ, de Veaux LC, Kadner RJ (1986). "Nucleotide sequence of the btuCED genes involved in vitamin B12 transport in Escherichia coli and homology with components of periplasmic-binding-protein-dependent transport systems". J. Bacteriol. 167 (3): 928–34. doi:10.1128/JB.167.3.928-934.1986. PMC 215960. PMID 3528129.

Worked examples

Example 1 — a first encounter with Vitamin B12-transporting ATPase

Start with the simplest possible case. Write down what Vitamin B12-transporting ATPase 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 Vitamin B12-transporting ATPase 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 Vitamin B12-transporting ATPase 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 Vitamin B12-transporting ATPase

In research: Vitamin B12-transporting ATPase 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 Vitamin B12-transporting ATPase 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: Vitamin B12-transporting ATPase is common in secondary-school and first-year university syllabi. It links to neighbouring topics EC 3.6.3, EC 3.6 stubs, Enzymes of known structure, so understanding it makes those chapters shorter.
In everyday life: Look for Vitamin B12-transporting ATPase 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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Frequently asked questions

What is Vitamin B12-transporting ATPase in simple terms?

In enzymology, a vitamin B12-transporting ATPase (EC 3.6.3.33) is an enzyme that catalyzes the chemical reaction ATP + H2O + vitamin B12out ⇌ {\displaystyle \rightleftharpoons } ADP + phosphate + vitamin B12in The 3 substrates of this enzyme are ATP, H2O, and vitamin B12, whereas its 3 products are…

Why does Vitamin B12-transporting ATPase 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 Vitamin B12-transporting ATPase?

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 Vitamin B12-transporting ATPase.