S100 calcium-binding protein A1-S100 calcium-binding protein P complex (S100A1-S100P)

The S100A1-S100P complex is a heterodimeric assembly of two calcium-binding proteins from the S100 family, S100A1 and S100P. S100A1 is a critical regulator of calcium homeostasis and contractility in the heart and is also involved in neuronal signaling and energy metabolism. S100P is an oncogenic protein frequently overexpressed in various malignancies, such as pancreatic, breast, and prostate cancers, where it promotes tumor progression and metastasis through interactions with the Receptor for Advanced Glycation End products (RAGE). The formation of the S100A1-S100P heterodimer serves as a regulatory mechanism that modulates the availability and activity of the individual monomers, potentially influencing their binding to downstream targets like non-muscle myosin IIA. Therapeutic targeting of this complex or its components involves small molecules such as cromolyn and amlexanox, which aim to disrupt pathological protein-protein interactions. Given the involvement of S100A1 in cardiovascular disease and S100P in oncology, the S100A1-S100P complex represents a significant focal point for drug development across multiple therapeutic areas.

Other names

S100A1-S100P heterodimerS100A1/S100P complexProtein S100-A1/Protein S100-P complex

Inhibition of protein-protein interactions between S100 subunits or with downstream targets like RAGE; modulation of calcium-induced conformational changes.