Calcitonin (CALCA) Protein

This gene encodes the peptide hormones calcitonin, calcitonin gene-related peptide and katacalcin by tissue-specific alternative RNA splicing of the gene transcripts and cleavage of inactive precursor proteins. Calcitonin is involved in calcium regulation and acts to regulate phosphorus metabolism. Calcitonin gene-related peptide functions as a vasodilator while katacalcin is a calcium-lowering peptide. Multiple transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Nov 2009]

CALCA: Calcitonin causes a rapid but short-lived drop in the level of calcium and phosphate in blood by promoting the incorporation of those ions in the bones. Belongs to the calcitonin family. 3 isoforms of the human protein are produced by alternative splicing.

Protein type: Secreted, signal peptide; Secreted

Chromosomal Location of Human Ortholog: 11p15.2

Cellular Component: extracellular space; cell soma; cytoplasm; extracellular region; terminal button; nucleus

Molecular Function: identical protein binding; protein binding; calcitonin receptor binding; hormone activity; protein complex binding; receptor binding

Biological Process: negative regulation of osteoclast differentiation; elevation of cytosolic calcium ion concentration during G-protein signaling, coupled to IP3 second messenger (phospholipase C activating); positive regulation of interleukin-1 alpha production; vasodilation of artery during baroreceptor response to increased systemic arterial blood pressure; response to pain; positive regulation of vasodilation; G-protein signaling, adenylate cyclase activating pathway; protein amino acid phosphorylation; positive regulation of interleukin-8 production; monocyte chemotaxis; elevation of cytosolic calcium ion concentration; leukocyte adhesion; vasculature development; cell-cell signaling; neuropeptide signaling pathway; receptor internalization; regulation of blood pressure; negative regulation of smooth muscle contraction; positive regulation of cAMP biosynthetic process; negative regulation of ossification; feeding behavior; positive regulation of adenylate cyclase activity; negative regulation of blood pressure; detection of temperature stimulus involved in sensory perception of pain; negative regulation of bone resorption; positive regulation of macrophage differentiation; inflammatory response; negative regulation of neurological process; aging; cytosolic calcium ion homeostasis; regulation of heart rate; adenylate cyclase activation; positive regulation of ossification; regulation of systemic arterial blood pressure by neurological process; G-protein coupled receptor internalization; response to heat; endothelial cell proliferation; regulation of inflammatory response; activation of protein kinase activity; endothelial cell migration; negative regulation of transcription, DNA-dependent; embryo implantation