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) via its interaction with PAM18/TIM14. May act by positioning PAM18/TIM14 in juxtaposition to mtHSP70 at the translocon to maximize ATPase stimulation (By similarity). Heterodimer with PAM18. Component of the PAM complex, at least composed of mtHsp70, MGE1, TIM44, PAM16, PAM17 and PAM18 (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.