Calcyclin, also known as Protein S100-A6, growth factor-inducible protein 2A9, S-100 calcium-binding protein A6 (S-100A6) or MLN 4, is a homodimeric member of the S-100 calcium-binding protein family whose expression is upregulated in proliferating and differentiating cells. Calcyclin is inducible by growth factors and overexpressed in acute myeloid leukemias. It is expressed in a cell-specific manner in subpopulations of neurons and astrocytes and in epithelial cells and fibroblasts. Calcyclin is a specific target of S-100B protein in vivo. The binding of Calcyclin to S-100B is stabilized by S-100B-bound calcium and zinc. Calcyclin associates with both Annexin XI and CacyBP (calcyclin-binding protein). It functions to activate several processes along the calcium signal transduction pathway including the regulation of cell growth, proliferation, secretion and exocytosis.
Synonyms: S100 alpha 6 PRA, Calcyclin, PRAGrowth factor inducible protein 2A9, Prolactin receptor associated protein, Prolactin receptor-associated protein, Protein S100 A6, Protein S100-A6, S100 A6, S100 calcium binding protein A6 calcyclin, S100 calcium binding protein A6, S100 calcium-binding protein A6, S100A6, S100A6_HUMAN, S100-A6, 2A9, 5B10, CABP, CACY, Calcyclin, Growth factor inducible protein 2A9, Growth factor-inducible protein 2A9, MLN 4, MLN4.