science

Thermocrinis jamiesonii

Thermocrinis jamiesonii is a science 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 Thermocrinis jamiesonii rather than just read about it. In short: Thermocrinis jamiesonii is a Gram-negative bacterium that is thermophilic, growing at temperatures ranging from 70 to 85°C. It grows as a chemolithoautotroph or chemolithoheterotroph, using thiosulfate as its sole electron donor, and is obligately microaerophilic.

Key takeaways

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

Reference excerpt

Thermocrinis jamiesonii is a Gram-negative bacterium that is thermophilic, growing at temperatures ranging from 70 to 85°C. It grows as a chemolithoautotroph or chemolithoheterotroph, using thiosulfate as its sole electron donor, and is obligately microaerophilic. The strain GBS1T was isolated from Great Boiling Spring, Nevada, USA.

Physiology Thermocrinis jamiesonii is a chemoautotrophic and chemolithoheterotrophic bacterium from the family Aquificaceae. It requires thiosulfate as an electron donor. It cannot use sulfur or hydrogen like others within this genus. This species can tolerate a higher NaCl concentration (1.17%) than other species within the genus, which includes Thermocrinis albus (0.7%), Thermocrinis minervae (0.5%), and Thermocrinis ruber (0.5%). T. jamiesonii is an obligate microaerophile, with a growth range of 0.5-8% oxygen, growing optimally at 1-2%, and cannot grow anaerobically. A neutral pH is preferred, ranging between 6.50 and 7.75, with optimal growth at 7.25. Thermocrinis jamiesonii can use peptone, Casamino acids, and acetate as carbon sources for chemolithoheterotrophic growth. It cannot use yeast extract, glucose, formate, or formamide.

Morphology Thermocrinis jamiesonii is a rod-shaped bacterium that was observed as individual or pairs. The length of cells ranges from 1.4 to 2.4 μm, with width ranging from 0.4 to 0.6 μm. Flagella have not been observed through electron microscopy, and motility has not been observed. However, genes encoding flagella were found in the genome, suggesting that motility may be expressed in situ. Spores did not form.

Phylogeny A phylogenetic analysis of the 16S rRNA gene sequence showed that Thermocrinis jamiesonii is most closely related to Thermocrinis ruber, within the family Aquificaceae. Other genera in the family include Aquifex and Hydrogenobacter.

Genomic analysis The draft genome of Thermocrinis jamiesonii is 1,315,625 bp long in 10 contigs. It encodes for 1,463 genes, 1,415 of which are protein-coding, 43 tRNA genes, and one rRNA operon. 36 carbohydrate-active enzymes (CAZymes) were found, including glycoside hydrolases (GHs), which suggests that T. jamiesonii may be able to grow on polymers, such as starch, like Thermocrinis minervae. A sox gene cluster (soxABXYZ) was present, which is required for thiosulfate oxidation. It lacks NiFe hydrogenase (hyaB) and formate dehydrogenase genes (fdhA), indicating that it cannot grow with H2 or formate, distinguishing it from other Thermocrinis species. It lacks the 2-oxoglutarate-ferredoxin oxidoreductase gene, which is required for the rTCA cycle to fix CO2 but does encode for other enzymes present in this cycle. All genes essential to flagellar assembly were present. Genes encoding signature lipids C20-22 found in the family Aquificaceae were present.

Ecology Thermocrinis jamiesonii was isolated from the water column on the north side of Great Boiling Spring near Gerlach, Nevada, USA. The abundance of Thermocrinis species in the spring water was estimated by 16S rRNA gene surveys as 91.5%.

Etymology Thermocrinis jamiesonii was named after David and Sandy Jamieson who provided logistical support during the sampling process and allowed research access to many scientists to Great Boiling Spring in Nevada, USA.

References

External links Species: Thermocrinis jamiesonii - List of Prokaryotic names with Standing in Nomenclature Type strain of Thermocrinis jamiesonii at BacDive – the Bacterial Diversity Metadatabase

Worked examples

Example 1 — a first encounter with Thermocrinis jamiesonii

Start with the simplest possible case. Write down what Thermocrinis jamiesonii claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Thermocrinis jamiesonii 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 Thermocrinis jamiesonii 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 Thermocrinis jamiesonii

In research: Thermocrinis jamiesonii appears in science 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 Thermocrinis jamiesonii 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: Thermocrinis jamiesonii is common in secondary-school and first-year university syllabi. It links to neighbouring topics Aquificota, so understanding it makes those chapters shorter.
In everyday life: Look for Thermocrinis jamiesonii 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 Thermocrinis jamiesonii in 20 minutes

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

Frequently asked questions

What is Thermocrinis jamiesonii in simple terms?

Why does Thermocrinis jamiesonii matter?

Because it connects several science 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 Thermocrinis jamiesonii?

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 Thermocrinis jamiesonii.