Metabolism | Regulation of Pentose Phosphate Pathway

📚 Premium Notes & Illustrations for Regulation of Pentose Phosphate Pathway: https://www.ninjanerd.org/lecture/regulation-of-pentose-phosphate-pathway-2

Ninja Nerds!
In this lecture, Professor Zach Murphy presents a focused breakdown of the Regulation of the Pentose Phosphate Pathway (PPP), helping you understand how this essential metabolic route is fine-tuned to meet cellular demands for NADPH and ribose-5-phosphate. This session builds on your understanding of the pathway’s structure and emphasizes how different metabolic states influence its direction and activity.

We begin by reviewing the key regulatory enzyme, glucose-6-phosphate dehydrogenase (G6PD), and how its activity is tightly controlled by the ratio of NADP⁺ to NADPH. You’ll learn that high levels of NADPH inhibit G6PD, limiting the oxidative phase, while low NADPH—seen in states of oxidative stress or active biosynthesis—activates the pathway. The role of insulin in upregulating G6PD expression during the fed state is also highlighted.

Next, we examine how the non-oxidative phase adapts to cellular needs: when the demand is high for nucleotide synthesis, the pathway favors production of ribose-5-phosphate, whereas in tissues prioritizing reductive biosynthesis (like adipose or liver), the focus shifts toward maximizing NADPH output. This metabolic flexibility is key to the PPP’s integration with glycolysis and the cell’s energy state.

Enjoy the lecture and support us below!

🌐 Official Links
Website: https://www.ninjanerd.org
Podcast: https://podcast.ninjanerd.org
Store: https://merch.ninjanerd.org

📱 Social Media

@ninjanerdlectures

https://www.instagram.com/ninjanerdlectures
https://www.facebook.com/ninjanerdlectures
https://x.com/ninjanerdsci/
https://www.linkedin.com/company/ninja-nerd/

💬 Join Our Community
Discord: https://discord.gg/3srTG4dngW

#ninjanerd #PentosePhosphatePathway #Metabolism