Anti-Mouse Notch1 PE

Description: This 22E5 monoclonal antibody reacts with the extracellular domain of mouse Notch1, one of four members of the Notch family of receptors. Notch receptors are 300-kDa single-pass transmembrane proteins. While the extracellular domain contains numerous epidermal growth factor-like repeats for ligand binding, the intracellular domain is involved in cell signaling. Upon binding its membrane-bound ligand (either Delta or Jagged), the Notch receptor undergoes proteolytic cleavage, first by ADAM-family metalloproteases and then by gamma-secretase. The second cleavage event releases the Notch intracellular domain (NICD), which subsequently translocates into the nucleus, heterodimerizes with the DNA-binding protein RBP-J, recruits co-activator molecules, and ultimately activates transcription.

Notch 1 is expressed on thymocytes, bone marrow hematopoietic stem cells, T and NK cells. Lower Notch1 expression levels can be found on B cells and monocytes. Studies show that some subsets of T-cell acute lymphoblastic leukemia (T-ALL) arise due to Notch1 chromosomal translocation with TCRbeta, which results in the expression of constitutively active Notch1. This cell surface receptor is involved in T cell lineage commitment, thymocyte development, and Th2 differentiation.

References: Radtke F, Fasnacht N, Macdonald HR. Notch signaling in the immune system. Immunity. 2010 Jan 29;32(1):14-27.

Fiorini E, Merck E, Wilson A, Ferrero I, Jiang W, Koch U, Auderset F, Laurenti E, Tacchini-Cottier F, Pierres M, Radtke F, Luther SA, Macdonald HR. Dynamic regulation of notch 1 and notch 2 surface expression during T cell development and activation revealed by novel monoclonal antibodies. J Immunol. 2009 Dec 1;183(11):7212-22. (22E5}, FC and IHC, Pubmed)

Amsen D, Antov A, Jankovic D, Sher A, Radtke F, Souabni A, Busslinger M, McCright B, Gridley T, Flavell RA. Direct regulation of Gata3 expression determines the T helper differentiation potential of Notch. Immunity. 2007 Jul;27(1):89-99.

Ellisen LW, Bird J, West DC, Soreng AL, Reynolds TC, Smith SD, Sklar J. TAN-1, the human homolog of the Drosophila notch gene, is broken by chromosomal translocations in T lymphoblastic neoplasms. Cell. 1991 Aug 23;66(4):649-61.