MAPT and Parkinson disease: In keeping with the importance of calcium dysregulation, a large number of CaMBPs involved in calcium and CaM-mediated signal transduction components are expressed in PD, including receptors (NMDAR, AchR, and Adenosine A2AR), biomarkers (αSyn, Aβ, Tau, and D2DR), and enzymes (CaMKII, PP2B, and cdk5) [115,116].