science

Redondoviridae

Redondoviridae 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 Redondoviridae rather than just read about it. In short: Redondoviruses (members of the Redondoviridae) are a family of human-associated DNA viruses. Their name derives from the inferred circular structure of the viral genome (“redondo” means round in Spanish).

Key takeaways

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

Reference excerpt

Redondoviruses (members of the Redondoviridae) are a family of human-associated DNA viruses. Their name derives from the inferred circular structure of the viral genome (“redondo” means round in Spanish). Redondoviruses have been identified in DNA sequence based surveys of samples from humans, primarily samples from the oral cavity and upper airway.

Virology

Taxonomy Redondoviruses are assigned by the International Committee on Taxonomy of Viruses (ICTV) to the Redondoviridae.

Classification The family Redondoviridae contains one genus, Torbevirus, which contains two species, Brisavirus (Torbevirus brisa) and Vientovirus (Torbevirus viento). The names derive from the words for breeze and wind in Spanish (“brisa” and “viento”), denoting the association with the human airway. The redondoviruses are members of the Circular Rep-Containing Single Stranded (CRESS) DNA Virus group.

Phylum: Cressdnaviricota Class: Arfiviricetes (Ar from arginine; fi from finger; describes a feature of the Rep protein conserved among viruses in this class) Order: Recrevirales (Re from redondoviruses; cre from CRESS)

Genome The redondovirus genome is circular, and by analogy to other CRESS viruses likely single stranded. Genomes are about 3.0 kilobases in size. The genome encodes three inferred proteins:

A Rep protein that likely initiates rolling-circle DNA replication A capsid protein An ORF3 protein of unknown function. ORF3 is entirely encoded within the Cap coding region in a different reading frame.

Epidemiology

Distribution Redondovirus genomes have been reported primarily from human samples surveyed using metagenomic DNA sequencing. They have been found primarily in oral and airway specimens. In some human populations, oral samples can show up to 80% Redondovirus positivity. Analysis of a variety of human-derived sample types showed a strong positive correlation of Redondovirus DNA and DNA of the oral amoeba Entamoeba gingivalis. Follow up studies showed that a xenic culture containing Entamoeba gingivalis and feeder bacteria was also positive for redondovirus DNA and RNA. Analysis using intracellular cross linking (Hi-C) showed crosslinking of redondovirus DNA to Entamoeba DNA, supporting Entamoeba gingivalis as the host.

Disease associations It is unknown whether redondoviruses cause human disease. Some CRESS viruses are known pathogens, such as porcine circovirus type 2. Redondoviruses have been reported associated with periodontitis. In one study, the levels fell with successful treatment. Abundance of redondovirus genomes has also been found to be high in some intensive care unit patients, and in patients with severe COVID-19. At present the basis of these disease associations is unclear.

References

External links Data related to Redondoviridae at Wikispecies

ICTV Report: Redondoviridae

Illustrations

Worked examples

Example 1 — a first encounter with Redondoviridae

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

In research: Redondoviridae 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 Redondoviridae 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: Redondoviridae is common in secondary-school and first-year university syllabi. It links to neighbouring topics DNA viruses, Virus families, so understanding it makes those chapters shorter.
In everyday life: Look for Redondoviridae 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.

Affiliate

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

How to study Redondoviridae in 20 minutes

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

Frequently asked questions

What is Redondoviridae in simple terms?

Why does Redondoviridae 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 Redondoviridae?

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 Redondoviridae.