Weakly binds calcium but binds zinc very tightly- distinct binding sites with different affinities exist for both ions on each monomer. Physiological concentrations of potassium ion antagonize the binding of both divalent cations, especially affecting high-affinity calcium-binding sites. Binds to and initiates the activation of STK38 by releasing autoinhibitory intramolecular interactions within the kinase. Interaction with AGER after myocardial infarction may play a role in myocyte apoptosis by activating ERK1/2 and p53/TP53 signaling. Dimer of either two alpha chains, or two beta chains, or one alpha and one beta chain. The S100B dimer binds two molecules of STK38. Interacts with AGER. The S100B dimer interacts with two molecules of CAPZA1. Although predominant among the water-soluble brain proteins, S100 is also found in a variety of other tissues. Belongs to the S-101 family. Note: This description may include information from UniProtKB.
Cellular Component: ruffle; extracellular space; cell soma; intracellular membrane-bound organelle; perinuclear region of cytoplasm; cytoplasm; extracellular region; nucleus
Molecular Function: identical protein binding; RAGE receptor binding; protein binding; protein homodimerization activity; zinc ion binding; calcium ion binding; tau protein binding; calcium-dependent protein binding
Biological Process: central nervous system development; positive regulation of I-kappaB kinase/NF-kappaB cascade; positive regulation of apoptosis; response to glucocorticoid stimulus; memory; regulation of cell shape; cell proliferation; learning and/or memory; axonogenesis; astrocyte differentiation; response to methylmercury; positive regulation of cell proliferation; innate immune response; regulation of neuronal synaptic plasticity
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.