Lecture10_4 - Main Points Energy coupling Enzymes are...

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2/3/11 Main Points Energy coupling Enzymes are biological catalysts Induced fit model of enzyme action Rate of enzyme controlled reactions Enzyme inhibitors
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2/3/11 ATP + H2O ADP + Pi -7.5 kcal/mol Glucose moves across the membrane from low to high concentration. Process A Process B 5 kcal/ mol
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2/3/11 ATP + H2O ADP + Pi 7.5 kcal/mol released ADP + Pi ATP + H2O 7.5 kcal/mol required
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2/3/11
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2/3/11 Proteins are used for coupling. ATP + H2O ADP + Pi Low glucose concentrati on High glucose concentrati on exergo nic endergo nic
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2/3/11 Phosphorylation: A mechanism of coupling Shape A Shape B
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2/3/11
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2/3/11 When a protein is phosphorylated via ATP a. ATP is produced b. The protein changes shape. c. Protein shape becomes firm. d. A free inorganic phosphate ion is
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2/3/11 Exergonic reactions are spontaneous. What does spontaneous mean? H2O2 H2O + O2
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2/3/11 Fig. 8-14 Progress of the reaction Produc ts Reactan ts G < O Transition state Free energy E A D C B A D D C C B B A A
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2/3/11 Figure 2-44b Molecular Biology of the Cell (© Garland Science 2008)
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This note was uploaded on 02/02/2011 for the course BIO 311C taught by Professor Satasivian during the Fall '08 term at University of Texas at Austin.

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Lecture10_4 - Main Points Energy coupling Enzymes are...

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