Calcium-binding proteins and ion channels

Calcium-binding proteins and ion channels represent a broad functional classification rather than a single therapeutic target. This category encompasses a diverse array of proteins that either bind calcium ions to act as sensors or buffers, such as calmodulin and S100 proteins, or facilitate the transport of calcium across cellular membranes, such as voltage-gated calcium channels (UniProt, 2024). These proteins are fundamental to calcium signaling, a ubiquitous mechanism that regulates critical physiological processes including muscle contraction, neurotransmitter release, and gene expression (NCBI, 2024). Dysregulation of these proteins is implicated in a wide range of pathologies, including cardiac arrhythmias, hypertension, and neurodegenerative disorders (PubMed, 2023). Because this term describes a functional class containing hundreds of distinct molecular entities, it is considered too broad for specific drug-target annotation. Therapeutic agents typically target specific members of this group, such as L-type calcium channels for cardiovascular indications or specific S100 proteins for inflammatory conditions (StatPearls, 2024).

Other names

Calcium-binding proteinsCalcium channelsCaBPsCalcium-modulated proteins

Drugs targeting this group typically modulate the flow of calcium ions through membrane pores or interfere with the binding of calcium to intracellular sensor proteins to alter downstream signaling (IUPHAR, 2023).