biology

LRRC23

LRRC23 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 LRRC23 rather than just read about it. In short: Leucine-rich repeat-containing protein 23 is a protein that in humans is encoded by the LRRC23 gene. Function The function of LRRC23 is unknown.

Key takeaways

LRRC23 belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect LRRC23 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of LRRC23 from memory before moving on to harder problems.

Reference excerpt

Leucine-rich repeat-containing protein 23 is a protein that in humans is encoded by the LRRC23 gene.

Function The function of LRRC23 is unknown. It is a member of the leucine-rich repeat family of proteins, which are known for participating in protein-protein interactions. Experimental evidence suggests that LRRC23 interacts with the CD28 protein in a pathway related to the immune system and development of regulatory T cells that control spontaneous autoimmune disease.

Protein sequence LRRC23 spans 343 residues containing two varieties of internally repeating sequence. Detected and aligned by RADAR, the most abundant repeat is the leucine-rich repeat, repeating 9 times in bases 89-287. The other repeated sequence occurs twice in bases 3-36. The RADAR program output, below, summarizes the composition and location of all the repeats and aligns them for comparison against each other.

The human genome produces three known variants of LRRC23. The largest splice variant, variant 3, contains 8 exons. Variants 1 and 2 use alternative first exons, and variant 2 excludes the seventh exon, giving it a total of seven exons making up the mRNA.

Protein structure Although the actual structure of LRRC23 is unknown, comparison to the crystal structures of various similar proteins such as 2OMW A (e-value 1.00e-17) reveals a structure typical of other leucine-rich repeat proteins. Alternating beta sheets and coils create a spiraled peptide chain forming an arch shape with beta-sheets occupying the concave surface. The aligned structure of 2OMW_A with LRRC23 spans acids 72-272 of the LRRC23 protein. Conserved asparagines are highlighted in yellow, showing the regularity of spacing and repeat structure within. This model was generated using Cn3D software provided by NCBI.

References

Illustrations

Worked examples

Example 1 — a first encounter with LRRC23

Start with the simplest possible case. Write down what LRRC23 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 LRRC23 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 LRRC23 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 LRRC23

In research: LRRC23 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 LRRC23 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: LRRC23 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Genes on human chromosome 12, Human chromosome 12 gene stubs, LRR proteins, so understanding it makes those chapters shorter.
In everyday life: Look for LRRC23 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 LRRC23 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what LRRC23 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 LRRC23 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is LRRC23 in simple terms?

Leucine-rich repeat-containing protein 23 is a protein that in humans is encoded by the LRRC23 gene. Function The function of LRRC23 is unknown.

Why does LRRC23 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 LRRC23?

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 LRRC23.