Fig. 3: A divergent peripheral stalk allows high flexibility during rotary catalysis.
From: An ancestral interaction module promotes oligomerization in divergent mitochondrial ATP synthases
a N-terminal OSCP extension provides a permanent central stalk attachment, while the C-terminal extension provides a phylum-specific attachment to the divergent peripheral stalk. b The C-terminal helices of subunits -β and -d provide a permanent F1 attachment. c Substeps of the c-ring during transition from rotational state 1 to 2. d F1 motion accommodating steps shown in (c). After advancing along with the rotor to state 1e, the F1 rotates in the opposite direction when transitioning to state 2a. e Tilting motion of F1 and accommodating bending of the peripheral stalk.
