Energy and Metabolism

ID #1672

What does the phosphofructokinase do in general?

It is the enzyme that catalyzes the third step in glycolysis. Breaking down the parts of the name makes its function fairly clear. Kinases phosphorylate molecules. "Fructo" suggests that this has something to do with fructose, and "Phospho" suggests that the molecule in question (fructose) already has a phosphate group on it somewhere. In other words, you're phosphorylating a molecule of fructose that already has one phosphate. Now look at step 3 in glycolysis. A molecule of Fructose-6-phosphate is being converted into a molecule of Fructose 1,6 bisphosphate. Doesn't that sound like what we just described?

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