DGKQ and Parkinson disease: Diacylglycerol kinase theta (DGKQ) has been suggested as a susceptibility gene for PD in an early GWAS study (Pankratz et al., 2009), with two additional GWASs providing further support for its involvement in PD (Simon-Sanchez et al., 2009; UK Parkinson’s Disease Consortium et al., 2011).