biology

KIF15

KIF15 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 KIF15 rather than just read about it. In short: Kinesin family member 15 is a protein that in humans is encoded by the KIF15 gene. This gene encodes a motor protein that is part of the kinesin superfamily.

Key takeaways

KIF15 belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect KIF15 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of KIF15 from memory before moving on to harder problems.

Reference excerpt

Kinesin family member 15 is a protein that in humans is encoded by the KIF15 gene. This gene encodes a motor protein that is part of the kinesin superfamily. KIF15 maintains half spindle separation by opposing forces generated by other motor proteins. KIF15 co-localizes with microtubules and actin filaments in both dividing cells and in postmitotic neurons.

Function KIF15 (also known as Kinesin-12 and HKLP2) is a motor protein expressed in all cells during mitosis and in postmitotic neurons undergoing axon growth. KIF15 maintains bipolar microtubule spindle apparatus in dividing cells and shares redundant functions with KIF11. KIF15 is thought to promote spindle assembly by cross-linking and sliding along microtubules creating a separation between centrosomes. The microtubule localization of Kif15 is being regulated by Kinesin binding protein (KBP). HeLa cells depleted of KIF11, with reduced microtubule dynamics, are able to form bipolar spindles from acentrosomal asters in a KIF15 dependent manner. Hence, inhibition of KIF15 function will be a vital therapeutic approach in cancer chemotherapy. Since KIF11 and KIF15 are functionally redundant, drugs targeting both the proteins will be more potent.

Function in neurons KIF15 restricts the movement of short microtubules into growing axons by generating forces on microtubules which counteract those generated by cytoplasmic dynein. KIF15, together with KIF23 become enriched in dendrites as neurons mature to promote the transport of minus-end distal microtubules into nascent dendrites.

Interactions KIF15 has been shown to interact with TPX2. Both these dimers cooperate to slide along microtubules and maintain bipolar spindles.

References

Illustrations

Worked examples

Example 1 — a first encounter with KIF15

Start with the simplest possible case. Write down what KIF15 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 KIF15 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 KIF15 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 KIF15

In research: KIF15 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 KIF15 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: KIF15 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Genes on human chromosome 3, Human chromosome 3 gene stubs, so understanding it makes those chapters shorter.
In everyday life: Look for KIF15 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 KIF15 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what KIF15 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 KIF15 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is KIF15 in simple terms?

Kinesin family member 15 is a protein that in humans is encoded by the KIF15 gene. This gene encodes a motor protein that is part of the kinesin superfamily.

Why does KIF15 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 KIF15?

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 KIF15.