biology

Meiothermus

Meiothermus 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 Meiothermus rather than just read about it. In short: Meiothermus is a genus of Deinococcota bacteria. Members of Meiothermus can be reliably distinguished from other genera in the family Thermaceae as well as all other bacteria by the presence of three conserved signature indels (CSIs) found in the proteins: 5-methyltetrahydrofolate–homocysteine methyltransferase, cadmium transporter and polynucleotide phosphorylase and are exclusively shared by species of this genus.

Key takeaways

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

Reference excerpt

Meiothermus is a genus of Deinococcota bacteria. Members of Meiothermus can be reliably distinguished from other genera in the family Thermaceae as well as all other bacteria by the presence of three conserved signature indels (CSIs) found in the proteins: 5-methyltetrahydrofolate–homocysteine methyltransferase, cadmium transporter and polynucleotide phosphorylase and are exclusively shared by species of this genus. Meiothermus is also different than the Thermus genus, which it was originally a member of, in their optimum growth temperatures, with Meiothermus being able to grow in colder environments. Meiothermus was first isolated with Thermus in alkaline and neutral hot springs in Kamchatka, Russia and Yellowstone National Park, USA.

Characteristics Meiothermus species of bacteria are gram-negative and are primarily chemoorganoheterotrophs, and some species can use nitrate as an electron acceptor. The Meiothermus genus was originally proposed to group together several moderately thermophilic organisms that were in the Thermus genus. It was later differentiated and made its own genus. Meiothermus are mostly distinguishable from Thermus by the lower bound of their optimum growth temperatures, 50-60 °C for Meiothermus and 70 °C for Thermus. Also, in Meiothermus, the presence of two glycolipid bands is seen whereas Thermus species only contain one. Thermus also contains eight conserved signature indels (CSIs) compared to the three that Meiothermus has. The optimal pH range for Meiothermus growth is in the range of 7.5–9.5. Meiothermus is a genus of bacteria that can only exist in aerobic environments. Most Meiothermus species have a red pigmentation with the exception of M. chilarophilus which has a yellow color. Some Meiothermus species can also form biofilms and stick to surfaces using specific adhesion organelles.

Habitats Meiothermus is a thermophilic genus of bacteria. Thermophiles are strains of bacteria that exist in environments that range from 45 °C to around 80 °C. Meiothermus in particular is best suited to ranges of 50–60 °C. Meiothermus is a strictly aerobic bacteria, needing oxygen for many of its processes. They also live inside the gut of some Antarctic polychaete worms (Leitoscoloplos geminus, Aphelochaeta palmeri, and Aglaophamus trissophyllus), where they make up a significant part of the worms' microbiome and produce antifreeze proteins that prevents ice formation within their cells and tissues.

Metabolism Some species of Meiothermus have the ability to break down keratin at much a rate much higher than natural rates. These keratinolytic processes performed by Meiothermus species like the common M. ruber lead to production of amino acids that can be used by the environment. Meiothermus can use other organic substrates like starch, disaccharides, amino acids and others as a carbon and energy source.

Phylogeny

The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnology Information (NCBI). Species incertae sedis:

"Meiothermus rosaceus" Chen et al. 2002

See also List of bacteria genera List of bacterial orders

References

Illustrations

Worked examples

Example 1 — a first encounter with Meiothermus

Start with the simplest possible case. Write down what Meiothermus 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 Meiothermus 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 Meiothermus 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 Meiothermus

In research: Meiothermus 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 Meiothermus 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: Meiothermus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bacteria genera, Deinococcota, Gram-negative bacteria, so understanding it makes those chapters shorter.
In everyday life: Look for Meiothermus 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 Meiothermus in 20 minutes

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

Frequently asked questions

What is Meiothermus in simple terms?

Why does Meiothermus 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 Meiothermus?

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 Meiothermus.