S100 Calcium Binding Protein B (S100B) Antibody – Mouse Monoclonal

S100B: 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.

Protein type: Calcium-binding

Chromosomal Location of Human Ortholog: 20p12

Cellular Component: cell soma; cytoplasm; extracellular space; nucleus; perinuclear region of cytoplasm; ruffle

Molecular Function: calcium ion binding; calcium-dependent protein binding; identical protein binding; protein binding; protein homodimerization activity; RAGE receptor binding; receptor binding; tau protein binding; zinc ion binding

Biological Process: astrocyte differentiation; learning and/or memory; memory; positive regulation of apoptosis; positive regulation of cell proliferation; positive regulation of I-kappaB kinase/NF-kappaB signaling; positive regulation of myelination; positive regulation of synaptic transmission; regulation of cell shape; regulation of neuronal synaptic plasticity; response to glucocorticoid stimulus; response to methylmercury