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Adenosine Triphosphate (ATP)

Adenosine Triphosphate (ATP). “universal energy molecule” It’s why we eat. Structure Adenine, a N base Ribose, a 5 C sugar Chain of 3 phosphates. How does ATP work?. A phosphate is transferred to another molecule iP transfer is enzyme controlled

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Adenosine Triphosphate (ATP)

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  1. Adenosine Triphosphate (ATP) • “universal energy molecule” • It’s why we eat. • Structure • Adenine, a N base • Ribose, a 5 C sugar • Chain of 3 phosphates

  2. How does ATP work? • A phosphate is transferred to another molecule • iP transfer is enzyme controlled • Phosphorylated molecule becomes more reactive

  3. How does ATP work? • Make substrates more reactive. • Make uphill, building reactions a bit more feasible • Exergonic hydrolysis of iP is coupled to endergonic process.

  4. Regeneration of ATP • Amount of ATP in any cell at any moment is surprisingly small • Average bacteria cell, < 5 million, only enough to sustain activity for a second or two. • Human body has enough ATP “on hand” to last about 20 seconds. • ATP supplies must be continually replenished (that’s why we eat, and breathe)!

  5. Cellular Respiration • Process by which cells extract energy from food • Literally it’s about using bond energy (electrons) to regenerate ATP • May be anaerobic or aerobic

  6. C6H12O6 + 6O2 6CO2 + 6H2O

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