Essential component of the PAM complex, a complex required for the translocation of transit peptide-containing proteins from the inner membrane into the mitochondrial matrix in an ATP-dependent manner. In the complex, it is required to regulate activity of mtHSP70 (SSC1/sscA) via its interaction with PAM18/TIM14. May act by positioning PAM18/pamR in juxtaposition to mtHSP70 at the translocon to maximize ATPase stimulation (By similarity). Heterodimer with PAM18/pamR. Component of the PAM complex, at least composed of mtHsp70, MGE1/mgeA, tim44, PAM16/pamP, PAM17/pamQ and PAM18/pamR (By similarity). The J-like region, although related to the J domain does not stimulate ATPase activity of mtHSP70. It nevertheless mediates the heterodimerization with the J domain of PAM18 and is therefore essential for PAM complex function (By similarity). Belongs to the TIM16/PAM16 family.