GPR37, a parkin-associated endothelial-like receptor (PAELR), has been linked to juvenile Parkinson’s disease in humans (Takahashi and Imai, 2003; Imai et al., 2007) and Parkinson disease models in mice (e.g., MPTP treated), where its absence protected against dopaminergic cell death (Marazziti et al., 2004; Mandillo et al., 2013). Here, GPR37 is linked to Parkinson disease.