biology

Interolog

Interolog 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 Interolog rather than just read about it. In short: An interolog is a conserved interaction between a pair of proteins which have interacting homologs in another organism. The term was introduced in a 2000 paper by Walhout et al.

Key takeaways

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

Reference excerpt

An interolog is a conserved interaction between a pair of proteins which have interacting homologs in another organism. The term was introduced in a 2000 paper by Walhout et al.

Example

Suppose that A and B are two different interacting human proteins, and A' and B' are two different interacting dog proteins. Then the interaction between A and B is an interolog of the interaction between A' and B' if the following conditions all hold:

A is a homolog of A'. (Protein homologs have similar amino acid sequences and derive from a common ancestral sequence). B is a homolog of B'. A and B interact. A' and B' interact. Thus, interologs are homologous pairs of protein interactions across different organisms.

See also Homology (biology) Systems biology Bioinformatics

References

External links Interactome.org Archived 2008-08-20 at the Wayback Machine: Interactome portal site. Interactomics.org: Interactomics portal site. [1]: Cross-species interaction prediction site.

Worked examples

Example 1 — a first encounter with Interolog

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

In research: Interolog 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 Interolog 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: Interolog is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bioinformatics, Bioinformatics stubs, Protein complexes, so understanding it makes those chapters shorter.
In everyday life: Look for Interolog 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 Interolog in 20 minutes

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

Frequently asked questions

What is Interolog in simple terms?

An interolog is a conserved interaction between a pair of proteins which have interacting homologs in another organism. The term was introduced in a 2000 paper by Walhout et al.

Why does Interolog 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 Interolog?

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 Interolog.