Figure 2:
The AAA proteases are organized in a higher order complex. i-AAA faces the intramembrane space and can interact with SLP2 and PARL on the opposite site of the inner membrane (IM). m-AAA on the matrix side can interact with the prohibitins (PHB1 and PHB2) and presumably OMA1 on the intramembrane space-facing side of the IM. Genetic alterations of any of these members of the AAA protein complex impact OMA1 function.