Summary
Synthesis through the mevalonate pathway is regulated by HMG-CoA reductase, the target of statins.
In depth
Synthesised from acetyl-CoA via mevalonate; HMG-CoA reductase is the rate-limiting enzyme and is inhibited by statins and feedback via SREBP. LDL delivers cholesterol to cells; HDL returns it to the liver.
Cholesterol is essential for membranes and hormones, but excess LDL leads to atherosclerosis. Diet influences levels moderately; genetics also matters.
Key idea: the body makes most of its own cholesterol.
Frequently asked questions
What is Cholesterol Metabolism?
Synthesis through the mevalonate pathway is regulated by HMG-CoA reductase, the target of statins.
Which area of biology covers Cholesterol Metabolism, and how advanced is it?
Cholesterol Metabolism is one of the 53 topics in Metabolism & Bioenergetics. It is rated Advanced, so it suits learners who want specialist depth. Related topics in this area include Lipid Biosynthesis, Hormonal Control of Metabolism, Thermodynamics of Metabolism.
Can you give an example of Cholesterol Metabolism?
Brown and Goldstein won the 1985 Nobel Prize for the LDL receptor pathway.
What should I learn before Cholesterol Metabolism?
Work through the Beginner topics in Metabolism & Bioenergetics first, such as Metabolism, Anabolism and Catabolism, ATP, then return to Cholesterol Metabolism. Advanced topics assume the Intermediate vocabulary.
What topics are related to Cholesterol Metabolism?
The closest topics to Cholesterol Metabolism are Lipid Biosynthesis, Hormonal Control of Metabolism, Thermodynamics of Metabolism, Ketone Body Metabolism. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Cholesterol Metabolism?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Cholesterol Metabolism. To practise the whole of Metabolism & Bioenergetics, use the Metabolism & Bioenergetics quiz.
How is Cholesterol Metabolism different from Lipid Biosynthesis?
Cholesterol Metabolism: Synthesis through the mevalonate pathway is regulated by HMG-CoA reductase, the target of statins. Lipid Biosynthesis: Fatty acid synthase builds fatty acids from acetyl-CoA and malonyl-CoA using NADPH. Read both side by side and note what each one explains.
How should I study Cholesterol Metabolism step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Lipid Biosynthesis and explain the difference aloud. Finally, take the Metabolism & Bioenergetics quiz and come back to this page for any question you miss.