Dissipation of the proton gradient is required for Formation of ATP from ADP+Pi Overcoming entropy to bring the reactants in close proximity Tight binding of ADP+Pi to the enzyme Release of ATP from ATP synthase
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Dissipation of the proton gradient is required for
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Formation of ATP from ADP+Pi |
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Overcoming entropy to bring the reactants in close proximity |
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Tight binding of ADP+Pi to the enzyme |
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Release of ATP from ATP synthase |
Step by step
Solved in 3 steps
- Explain from a chemical stand point why ATP has a high phosphoryl-transfer potential. Make sure to compare ATP with its hydrolysis products, ADP and inorganic phosphate.Which is the correct link between conformation of the beta-subunit of the F1 component of the ATP synthase and ADP+P¡ or ATP? loose Binding Change Mechanism binding ATP ADP+P ATP Crepeat ADP ADP +P; ATP ATP +P; tight binding open ATP loose => binding ADP+Pi open => catalyzes ADP+P¡ into ATP tight => releases ATP open => releases ADP+P¡The ∆G for the streaming of H+ down the concentration gradient that powers ATP synthase is Positive Or Negative
- The F-class ATP synthase and the V-class proton pumps are similar in many ways. How are they different? their subunit composition the ion with which they interact none of the above their subcellular localizationWhich of the following regarding the ATP Synthase is INCORRECT? Protons flow through the a and c subunits The translocation of four protons through the ATP synthase fuels the synthesis of one ATP molecule The F1 domain can function as an ATPase The y subunit rotates while the xß dimers are stationaryThe formation of ATP by ATP Synthase is part of a coupled reaction, as discussed in class. Given the information below and using what you know about ATP Synthase and the proton motive force, calculate the overall AG and determine if the coupled reaction is favorable overall. Note that you do not need to worry about intermediates like we did for the class example. ADP + Pi → ATP has a AG = 7.3 kcal/mol 2 moles of protons traveling back down their gradient across the inner mitochondrial membrane has a AG = -10.28 kcal/mol %3D O a. Overall AG = -17.58 kcal/mol, favorable overall O b. Overall AG = -2.98 kcal/mol, favorable overall %3D O c. Overall AG = 2.98 kcal/mol, unfavorable overall O d. Overall AG = 17.58 kcal/mol, favorable overall
- Choose any/all that apply to the proton-motive force and ATP synthesis. The active pumping of protons through ATP synthase against their concentration gradient provides the energy needed for ATP synthesis. Rotation of the y subunit creates conformational changes in the active sites of ATP synthase that drive the release of ATP from the enzyme. Each 3 subunit of ATP synthase has a distinct amino acid sequence that accounts for the three different active sites present in the enzyme. The ATP molecules produced from the pair of electrons provided by NADH have greater potential energy than the ATP molecules produced from the pair of electrons provided by FADH₂. Inhibition of either ATP synthase or ATP translocase will stop flux through the electron- transport chain.Stearic acid is an 18-carbon fatty acid. If a single molecular of stearic acid is within the cytosol of the cells: Describe the process by which stearic acid would be metabolised, beginning the molecule in the cytosol of the cell, ending with the creation of ATP, and assuming the cell has sufficient oxygen for all reactions to take place Showing all working, calculate how many ATP molecules could be generated from a single molecule of stearic acid in the cytosol of the cellATP hydrolysis is exergonic or endergonic
- The proton-motive force drives the rotation of the Y subunit of ATP synthase. This creates conformational changes in the active sites of ATP synthase that accelerate the rate of bond formation between ADP and P, through the stabilization of a tetrahedral intermediate. True FalseGive all the reactions that will produce ATP either by substrate-level phosphorylation (SLP) or by oxidative phosphorylation (OP). If the given require a shuttle system, please indicate both MA shuttle and GP shuttle and give the ATP produced. Given: glucose 6-phosphate to 2succinly CoAThe synthesis of ATP by oxidative phosphorylation, using the energy released by movement of protons across the membrane down their electrochemical gradient, is an example of which of the following processes?
