Probable 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. May act as a co-chaperone that stimulate the ATP-dependent activity (By similarity). Probable component of the PAM complex at least composed of a mitochondrial HSP70 protein, GrpE, tim-44, tim-16 and tim-14/dnj-21. Belongs to the TIM14 family.