S100A1 Antibody – Rabbit Polyclonal

The protein encoded by this gene is a member of the S100 family of proteins containing 2 EF-hand calcium-binding motifs. S100 proteins are localized in the cytoplasm and/or nucleus of a wide range of cells, and involved in the regulation of a number of cellular processes such as cell cycle progression and differentiation. S100 genes include at least 13 members which are located as a cluster on chromosome 1q21. This protein may function in stimulation of Ca2+-induced Ca2+ release, inhibition of microtubule assembly, and inhibition of protein kinase C-mediated phosphorylation. Reduced expression of this protein has been implicated in cardiomyopathies. [provided by RefSeq, Jul 2008]

S100A1: 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. Dimer of either two alpha chains, or two beta chains, or one alpha and one beta chain. Interacts with AGER and CAPZA1. Interacts with FKBP4. Interacts with RYR1 and RYR2. Highly prevalent in heart. Also found in lesser quantities in skeletal muscle and brain. Belongs to the S-100 family.

Protein type: Calcium-binding; Endoplasmic reticulum

Chromosomal Location of Human Ortholog: 1q21

Cellular Component: neuron projection; protein complex; sarcoplasmic reticulum; M band; Z disc; nucleus

Molecular Function: identical protein binding; protein binding; protein homodimerization activity; calcium ion binding; calcium-dependent protein binding; ATPase binding

Biological Process: substantia nigra development; negative regulation of transcription from RNA polymerase II promoter; regulation of heart contraction