Anti-Phosphorylated Vimentin (Ser55) (Mouse) mAb

Vimentin is an intermediate filament protein distributed widely in the cytoplasm and is phosphorylated by several protein kinase in vitro. Ser55 residues on vimentin were reported to be one of the phosphorylation sites of vimentin at metaphase and were the phosphorylation sites for cdc2 kinase but not for cAMP-dependent protein kinase, protein kinase C, and Ca2+-calmodulin-dependent protein kinase II in vitro. Immunofluorescence and immunoelectron microscopy showed that vimentin Ser55 residues distributed in the entire cytoplasmic vimentin filament system are phosphorylated when the cells enter mitosis and de-phosphorylated in cytokinesis. The use of this antibody that specifically reacts with the phosphorylation site of vimentin Ser55 by cdc2 kinase enables estimation of a particular cdc2 kinase function.