Answered: If a bacterium has 12 c-subunits in its…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Question

If a bacterium has 12 c-subunits in its ATP synthase and a yeast (eukaryotic) has 10 c-subunits in its ATP synthase, which would have more ATP per mole glucose available for processes that require ATP in the cytoplasm? Calculate the amounts of ATP produced per H+ transferred to explain your answer.

Expert Solution

Step 1

The multiprotein ATP synthase catalyses ATP synthesis as protons flow back through the inner membrane down the electrochemical proton gradient. It consist of two components - F₀ and F_1. The F₀component is embedded in the inner mitochondrial membrane and contain one ‘a’ subunit, two ‘b’ subunit and 9-12 ‘c’ subunit. The alpha subunit includes two half channels. Protons can pass into either of these channels. Each proton enters the cytoplasmic half channel , follows a complete 360⁰rotation of the c ring.