biology

PFKFB4

PFKFB4 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 PFKFB4 rather than just read about it. In short: 6-phosphofructo-2-kinase/fructose-2,6-biphosphatase 4 also known as PFKFB4 is an enzyme which in humans is encoded by the PFKFB4 gene. Function The bifunctional 6-phosphofructo-2-kinase (EC 2.7.1.105)/fructose-2,6-bisphosphatase (EC 3.1.3.46) (PFKFB) regulates the steady-state concentration of fructose 2,6-bisphosphate, an activator of a key regulatory enzyme of glycolysis, phosphofructokinase.

Key takeaways

PFKFB4 belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect PFKFB4 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of PFKFB4 from memory before moving on to harder problems.

Reference excerpt

6-phosphofructo-2-kinase/fructose-2,6-biphosphatase 4 also known as PFKFB4 is an enzyme which in humans is encoded by the PFKFB4 gene.

Function The bifunctional 6-phosphofructo-2-kinase (EC 2.7.1.105)/fructose-2,6-bisphosphatase (EC 3.1.3.46) (PFKFB) regulates the steady-state concentration of fructose 2,6-bisphosphate, an activator of a key regulatory enzyme of glycolysis, phosphofructokinase. In 2012 research by scientists at Cancer Research UK’s London Research Institute show that an enzyme called PFKFB4 is essential for balancing these two processes – making sure the cell’s energy needs are met without allowing free radicals to build up and trigger cell death. Study leader Dr. Almut Schulze, said: “Our study suggests that PFKFB4 acts to fine-tune the process by which cells convert glucose into energy. Blocking this enzyme in prostate cancer cells grown in the lab stalled growth and triggered a catastrophic build-up of free-radicals, suggesting that it could be a suitable drug target. Importantly, this route to energy production is common to many different types of cancer, suggesting that drugs to target it could potentially be used to treat a variety of cancers.”

References

Illustrations

Worked examples

Example 1 — a first encounter with PFKFB4

Start with the simplest possible case. Write down what PFKFB4 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 PFKFB4 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 PFKFB4 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 PFKFB4

In research: PFKFB4 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 PFKFB4 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: PFKFB4 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 PFKFB4 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “PFKFB4” →

Affiliate

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

How to study PFKFB4 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what PFKFB4 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 PFKFB4 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is PFKFB4 in simple terms?

6-phosphofructo-2-kinase/fructose-2,6-biphosphatase 4 also known as PFKFB4 is an enzyme which in humans is encoded by the PFKFB4 gene. Function The bifunctional 6-phosphofructo-2-kinase (EC 2.7.1.105)/fructose-2,6-bisphosphatase (EC 3.1.3.46) (PFKFB) regulates the steady-state concentration of fruc…

Why does PFKFB4 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 PFKFB4?

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 PFKFB4.