May function as a regulatory ATPase and be related to secretion/protein trafficking process. Involved in mitochondrial-mediated antiviral innate immunity, activates RIG-I-mediated signal transduction and production of IFNB1 and pro-inflammatory cytokine IL6. ATP + H2O = ADP + H(+) + phosphate Interacts with PHB and PHB2. Interacts with MAVS; the interaction is enhanced by Sendai virus infection. Belongs to the ClpA/ClpB family.