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| Motif | Protein | Start | End | Switch Type | Switch Subtype | Switch description | Information | Evidence |
Calcium signaling pathway (KEGG - hsa04020) | ||||||||
| LIG_PDZ_Class_1 | AT2B4_HUMAN | 1236 | 1241 | Binary | Pre‑translational | Alternative splicing removes the PDZ-binding motif of Plasma membrane calcium-transporting ATPase 4 (ATP2B4), abrogating binding to Nitric oxide synthase, brain (NOS1). PMCA4b acts as a negative regulator of Nitric oxide synthase, brain (NOS1), reducing production of nitric oxide in heart tissue. This negative regulation was not dependent on a conformational change due to binding of the PDZ ligand, but on Ca2+ depletion in close proximity of the enzyme. Nitric oxide production by NOS1 is known to be important in the regulation of excitation-contraction (EC) coupling and subsequently contractility. | Inferred | |
Salivary secretion (KEGG - hsa04970) | ||||||||
| LIG_PDZ_Class_1 | AT2B4_HUMAN | 1236 | 1241 | Binary | Pre‑translational | Alternative splicing removes the PDZ-binding motif of Plasma membrane calcium-transporting ATPase 4 (ATP2B4), abrogating binding to Nitric oxide synthase, brain (NOS1). PMCA4b acts as a negative regulator of Nitric oxide synthase, brain (NOS1), reducing production of nitric oxide in heart tissue. This negative regulation was not dependent on a conformational change due to binding of the PDZ ligand, but on Ca2+ depletion in close proximity of the enzyme. Nitric oxide production by NOS1 is known to be important in the regulation of excitation-contraction (EC) coupling and subsequently contractility. | Inferred | |