Table 1.
Mechanism elucidated | Computational prediction | Supporting experiments | References (Computational/Experiment) |
---|---|---|---|
Source of requisite IP3 | PIP2 synthesis concurrent with hydrolysis | IP3 production in neuroblastoma cells | Xu et al., 2003/Xu et al., 2003 |
Purkinje spine electrophysiology | D-type K and class-E Ca channels required | Purkinje neuron current clamp | Miyasho et al., 2001/Miyasho et al., 2001 |
Biochemical-electrical cross-talk | Emergent cross-signaling properties | Biochemical before electrical changes in SCA2 mice | Brown and Loew, 2012/Hansen et al., 2013 |
AMPAR all-or-none activation | MAPK-PKC positive feedback loop | Purkinje stimulation by CFs/PFs | Ogasawara et al., 2008/Ogasawara et al., 2008 |
Local PIP2 sequestration | Fine-tunes coincidence detection | Purkinje stimulation by CFs/PFs | Brown et al., 2008/Wang et al., 2000 |
Coincidence detection | 50–100 ms time window CF before PF | Purkinje stimulation by CFs/PFs | Brown et al., 2008/Sarkisov and Wang, 2008 |
IP3R1 compensation | IP3R1 downregulation in polyQ disorders with IP3R1 supersensitivity | IP3R1 (and other members of the signaling complex*) downregulation in DLPRA | Brown and Loew, 2012/Suzuki et al., 2012 |
(Supplementary Material, S1 Signaling complex regulation).