ATP hydrolysis mechanism | Energy and enzymes | Biology | Khan Academy

TL;DR

ATP hydrolysis releases energy for cellular processes through the action of ATPase enzymes.

Transcript

• We've talked a lot about ATP being the energy currency of cells, but I want to dig a little bit deeper into that in this video. And as we'll see when we go from ATP to ADP, ADP + a Phosphate group, we have a release of free energy. If we look at just the system, ATP's free energy is over here, but once hydrolysis has taken place and now it's ADP ... Read More

Key Insights

• 🥶 ATP hydrolysis releases free energy, which is crucial for powering cellular processes.
• ❓ Spontaneous hydrolysis of ATP requires overcoming an activation energy barrier.
• 🖐️ ATPase enzymes play a vital role in facilitating the hydrolysis reaction by reducing the repulsion between negative charges.
• 🥵 The released energy from ATP hydrolysis is usually used for useful cellular work rather than being wasted as heat.

Summary & Key Takeaways

• ATP is the energy currency of cells, and hydrolysis of ATP into ADP and a phosphate group releases free energy.

• The release of free energy during ATP hydrolysis is a spontaneous reaction with a decrease in free energy of approximately 30.5 KJ/mol.

• Hydrolysis of ATP requires overcoming an activation energy barrier, which can be facilitated by ATPase enzymes.