The function of GRPEL1 (GrpE like 1, mitochondrial, Ensembl gene identifier ENSG00000109519) is as follows. 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 (By similarity). Seems to control the nucleotide-dependent binding of mitochondrial HSP70 to substrate proteins (PubMed:11311562). .