RYR2: ryanodine receptor calcium release channel. Regulates communication between transverse-tubules and sarcoplasmic reticulum. Contraction of cardiac muscle is triggered by release of calcium ions from SR following depolarization of T-tubules. Phosphorylation by PKA dissociates FKBP12.6 from RYR2. Two splice isoforms have been described.
Protein type: Membrane protein, multi-pass; Channel, ligand-gated; Membrane protein, integral; Transporter, ion channel; Transporter
Cellular Component: neuron projection; sarcoplasmic reticulum membrane; smooth endoplasmic reticulum; protein complex; sarcoplasmic reticulum; endoplasmic reticulum; cell; integral to membrane; nuclear envelope; cytosol; Z disc; sarcomere; extrinsic to internal side of plasma membrane; membrane; cytoplasm; plasma membrane; intracellular; A band; sarcolemma
Molecular Function: calcium-induced calcium release activity; calmodulin binding; identical protein binding; protein binding; enzyme binding; protein self-association; calcium-release channel activity; calcium channel activity; ion channel activity; calcium ion binding; intracellular ligand-gated calcium channel activity; protein kinase binding; ryanodine-sensitive calcium-release channel activity
Biological Process: positive regulation of sequestering of calcium ion; cytosolic calcium ion homeostasis; regulation of heart rate; multicellular organismal development; calcium-mediated signaling; positive regulation of heart rate; response to redox state; Wnt receptor signaling pathway through beta-catenin; release of sequestered calcium ion by sarcoplasmic reticulum into cytosol; response to caffeine; cellular calcium ion homeostasis; BMP signaling pathway; response to magnesium ion; transport; release of sequestered calcium ion into cytosol; reduction of cytosolic calcium ion concentration; calcium ion transport; response to hypoxia; ion transport; detection of calcium ion; response to calcium ion; transmembrane transport; cardiac muscle contraction
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