Mitochondrial protein enriched in neurons that acts as a regulator of mitochondrial respiration (By similarity). Associates with the ATP synthase complex and facilitates ATP synthesis (By similarity). May be a chaperone protein involved in the turnover of the subunits of mitochondrial complex I N-module. It facilitates the degradation of N- module subunits damaged by oxidative stress, and contributes to complex I functional efficiency (PubMed:33465056). . This is the function of Ensembl gene identifier ENSG00000176410 (DNAJC30, DnaJ heat shock protein family (Hsp40) member C30).