BIOL 201 Lecture 13: Lecture 13.docx
25 Feb 2013
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Document Summary
Atp synthase has 2 parts, f1 and f0. F1 has 5 further subunits, 3 alphas, 3 betas, gamma, delta, epsilon. , alpha and beta exists in a triplet of dimers. 1 a subunit, 2 b subunits, and 1 c subunit. Gamma, epsilon and c are capable of rotating. As the rotating subunits rotate, gamma subunit brushes against the alpha/beta dimers. The rotation itself is caused by the discharge of the proton gradient, the rotation causes conformational changes in the gamma subunit. The a subunit has 2 half channel, which is a channel for half of the distance. After entering a half channel, the proton can associate with the c subunit. The c subunit moves into the membrane itself, away from the a subunit. The number of c subunits could range from 10 to 14 in organisms. Aspartic acid residues on the outside of the subunit c.
