Plays a role in maintaining adipose tissue function through the regulation of ceramide levels (PubMed:32291319, PubMed:38961186). Mediates the stability of ceramide synthetases, CERS2 and CERS5, and their activities (Probable). {ECO:0000269|PubMed:32291319, ECO:0000269|PubMed:38961186, ECO:0000305|PubMed:38961186}. This is the function of PAQR4 (progestin and adipoQ receptor family member 4, ENSG00000162073).