The function of ENSG00000120675 (DNAJC15, DnaJ heat shock protein family (Hsp40) member C15) is as follows. Negative regulator of the mitochondrial respiratory chain. Prevents mitochondrial hyperpolarization state and restricts mitochondrial generation of ATP (By similarity). Acts as an import component of the TIM23 translocase complex. Stimulates the ATPase activity of HSPA9. .