Intracellular calcium-binding protein

Intracellular calcium-binding proteins are a broad, structurally and functionally diverse group of proteins defined by their ability to bind calcium ions (Ca^2+^) inside the cell via conserved motifs such as the EF-hand domain[1][5][7]. These proteins play fundamental roles in calcium homeostasis, buffering, signal transduction, modulation of enzyme function, and regulation of ion channels in virtually all cell types[1][2][3][4][5][7]. Family members include calmodulin, parvalbumin, S100 proteins, calbindin, calretinin, annexins, and others, many of which have highly specialized and sometimes tissue-specific functions[1][2][3]. The precise physiological roles range from regulating neuronal excitability and neurotransmitter release, to controlling muscle contraction, apoptosis, cellular proliferation, and differentiation, as well as influencing disease processes such as neurodegeneration, cancer, and inflammation[2][3][4][5]. "Intracellular calcium-binding proteins" is not a single molecular entity or drug target, but rather a generic descriptor for a class of related proteins, each potentially a unique target[1][2][3][7]. For precise pharmacological or structural information, individual member proteins should be specified.

Other names

Calcium-binding proteinIntracellular Ca2+-binding proteinEF-hand protein (refers to a common motif/family)Calmodulin (family member example)S100 protein (family member example)Calbindin (family member example)Parvalbumin (family member example)