BIOL 103 Lecture Notes - Lecture 11: Santa Barbara City College, Atp Synthase, Intermembrane Space
Document Summary
Cell biology ph and orientation of atp synthase. Since exterior membrane is porous, the exterior membrane ph does not change much. Potential energy stored in the gradient comes in part from chemical differential but more from electrical difference across membrane. Ph 7 in intermembrane space and ph 8 in matrix. In chloroplasts: the thylakoid membrane is the site of the etc and atp synthase. The protons are pumped into the thylakoid lumen, the ph in ph compartment lowers significantly, compared to the stroma (ph 5 vs. ph 8) Atp synthase large protein complex that is embedded in the imm or thylakoid membrane. Same enzyme used by bacteria to produce atp on their plasma membranes. Reverses the process of hydrolysis by forming atp from adp and pi. Atp synthase consists of 2 separate motors coupled together, f0 motor in the membrane and f1 in the intermembrane space.
