Regulates ATP-dependent protein translocation into the mitochondrial matrix. Probable component of the PAM complex at least composed of a mitochondrial HSP70 protein, GRPE, TIMM44, TIMM16/PAM16 and TIMM14. Associates with the TIM23 complex. The J-like region, although related to the J domain does not have co-chaperone activity. Belongs to the TIM16/PAM16 family.