ATPase Dimers
Mitochondrial ATPases are able to form V-shaped dimers inducing a strong membrane curvature, ultimately leading to the formation of mitochondrial cristae. A recent publication from Hahn an collaegues closely analyzed the interacting subunits in the yeast Yarrowia lipolytica using X-ray crystallography and Cryo-EM. The illustration above shows some mitochondrial cristae (red colour) dotted with ATPases (yellow and blue colour). ATPase dimers, located at the cristae edges, are given in lighter colours.
The picture has been updated thanks to comments from Thomas Meier.