biology

NDUFA4L2

NDUFA4L2 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 NDUFA4L2 rather than just read about it. In short: NADH dehydrogenase (ubiquinone) 1 alpha subcomplex, 4-like 2 is a protein that in humans is encoded by the NDUFA4L2 gene. The NDUFA4L2 protein is a subunit of NADH dehydrogenase (ubiquinone), which is located in the mitochondrial inner membrane and is the largest of the five complexes of the electron transport chain.

Key takeaways

NDUFA4L2 belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect NDUFA4L2 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NDUFA4L2 from memory before moving on to harder problems.

Reference excerpt

NADH dehydrogenase (ubiquinone) 1 alpha subcomplex, 4-like 2 is a protein that in humans is encoded by the NDUFA4L2 gene. The NDUFA4L2 protein is a subunit of NADH dehydrogenase (ubiquinone), which is located in the mitochondrial inner membrane and is the largest of the five complexes of the electron transport chain.

Structure The NDUFA4L2 gene is located on the long q arm of chromosome 12 at position 13.3 and it spans 5,860 base pairs. NDUFA4L2 is a subunit of the enzyme NADH dehydrogenase (ubiquinone), the largest of the respiratory complexes. The structure is L-shaped with a long, hydrophobic transmembrane domain and a hydrophilic domain for the peripheral arm that includes all the known redox centers and the NADH binding site. It has been noted that the N-terminal hydrophobic domain has the potential to be folded into an alpha helix spanning the inner mitochondrial membrane with a C-terminal hydrophilic domain interacting with globular subunits of Complex I. The highly conserved two-domain structure suggests that this feature is critical for the protein function and that the hydrophobic domain acts as an anchor for the NADH dehydrogenase (ubiquinone) complex at the inner mitochondrial membrane.

Function The human NDUFA4L2 gene codes for a subunit of Complex I of the respiratory chain, which transfers electrons from NADH to ubiquinone. Initially, NADH binds to Complex I and transfers two electrons to the isoalloxazine ring of the flavin mononucleotide (FMN) prosthetic arm to form FMNH2. The electrons are transferred through a series of iron-sulfur (Fe-S) clusters in the prosthetic arm and finally to coenzyme Q10 (CoQ), which is reduced to ubiquinol (CoQH2). The flow of electrons changes the redox state of the protein, resulting in a conformational change and pK shift of the ionizable side chain, which pumps four hydrogen ions out of the mitochondrial matrix.

References

This article incorporates text from the United States National Library of Medicine, which is in the public domain.

Illustrations

Worked examples

Example 1 — a first encounter with NDUFA4L2

Start with the simplest possible case. Write down what NDUFA4L2 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 NDUFA4L2 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 NDUFA4L2 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 NDUFA4L2

In research: NDUFA4L2 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 NDUFA4L2 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: NDUFA4L2 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Genes on human chromosome 12, Proteins, so understanding it makes those chapters shorter.
In everyday life: Look for NDUFA4L2 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 NDUFA4L2 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NDUFA4L2 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 NDUFA4L2 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NDUFA4L2 in simple terms?

Why does NDUFA4L2 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 NDUFA4L2?

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 NDUFA4L2.