What is the main source of energy for ATP replenishment for ATP-PC system
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- What triggers the movement of the thin filament? Is it because of the high --> low energy configuration? The exact mechanism is confusing to me.V-class proton pumps run backward relative to the F-class ATP synthase. Consider the cartoon, which shows the conformations of the beta-subunits and ATPIADP + Pj of the F-class synthase. Which of the following associations between the conformation of the beta subunit and ATP/ADP + P¡ is correct for V- Binding Change Mechanism loose binding ADP+P ATP ATP class pumps? C repeat ADP + P, ADP АТР tight binding АТР +P оpen АТР O The open conformation releases ATP. Hydrolysis of ATP to ADP + P¡ drives the change from tight to loose. O Binding of ADP + P¡ drives change from open to loose. Hydrolysis of ATP to ADP + Pj drives the change from open to loose.Calculate the rate enhancement for the enzyme pair: Enzyme 1: Kcat (sec-1)= 5.5 KM (µ M) = 1245 Kcat / KM = 0.00442 (µ M-1 sec-1) Enzyme 2: Kcat (sec-1)= 3.2 KM (µ M) = 1785 Kcat / KM = 0.00179 (µ M-1 sec-1)
- If actively respiring mitochondria are exposed to an inhibitor of ATPADP translocase, the electrontransport chain ceases to operate. Why?How much free energy is released when ATP is converted toADP + Pior when AMP is converted to adenosine and Pi?Whatis the main idea behind the conformational coupling mechanism for ATP synthase? Describe the three conformational states.
- What are the catalytic subunits of F1 particle of ATP synthase?ATP + H20 → ADP + Pi AG = -30.5kJ/mol 3Na* (inside) + 2K* (outside) + ATP* + H20 → 3Na* (outside) + 2K* (inside) + ADP3 + Pi2 + H* Calculate the minimum pH difference across a membrane that could, theoretically at least, support he fromation of 1.0 mM ATP from Pi and 1.0 mM ADP at pH 7 at 25 degrees.The standard free energy of hydrolysis of inorganic polyphosphate (polyP) is about −20 kJ/mol for each Pi released. We calculated in Worked Example 13–2 that, in a cell, it takes about 50 kJ/mol of energy to synthesize ATPfrom ADP and Pi. Is it feasible for a cell to use polyphosphate to synthesize ATP from ADP? Explain your answer.
- The ∆G for the streaming of H+ down the concentration gradient that powers ATP synthase is Positive Or NegativeCalculate the ΔG° for the making of 30 ATP from 30 ADP ATP + H2O ↔ ADP + Pi ∆G°’ = –30.5 kJ/mol ATP + H2O ↔ AMP + PPi ∆G°’ = –45.6 kJ/molIndicate the hinge region, GK kinaseselectivity pocket and explain "Solvent AccessibilitySurface" and indicate the salt forming group at ATPbinding site