MAML1 Antibody – Goat Polyclonal

This protein is the human homolog of mastermind, a Drosophila protein that plays a role in the Notch signaling pathway involved in cell-fate determination. There is in vitro evidence that the human homolog forms a complex with the intracellular portion of human Notch receptors and can increase expression of a Notch-induced gene. This evidence supports its proposed function as a transcriptional co-activator in the Notch signaling pathway. [provided by RefSeq, Jul 2008]

MAML1: Acts as a transcriptional coactivator for NOTCH proteins. Has been shown to amplify NOTCH-induced transcription of HES1. Enhances phosphorylation and proteolytic turnover of the NOTCH intracellular domain in the nucleus through interaction with CDK8. Binds to CREBBP/CBP which promotes nucleosome acetylation at NOTCH enhancers and activates transcription. Induces phosphorylation and localization of CREBBP to nuclear foci. Plays a role in hematopoietic development by regulating NOTCH-mediated lymphoid cell fate decisions. Interacts (via N-terminus) with NOTCH1, NOTCH2, NOTCH3 and NOTCH4 (via ankyrin repeat region). Interacts (via N-terminus) with p53 (via DNA-binding region). Forms a DNA-binding complex with Notch proteins and RBPSUH/RBP-J kappa/CBF1. Also binds CREBBP/CBP and CDK8. Widely expressed with highest levels in heart, pancreas, peripheral blood leukocytes and spleen. Belongs to the mastermind family.

Protein type: Transcription, coactivator/corepressor

Chromosomal Location of Human Ortholog: 5q35

Cellular Component: intracellular membrane-bound organelle; nuclear speck; nucleoplasm; nucleus

Molecular Function: peptide antigen binding; protein binding; protein kinase binding; transcription coactivator activity

Biological Process: activation of Notch receptor target transcription factor; myoblast differentiation; Notch signaling pathway; positive regulation of transcription from RNA polymerase II promoter; protein amino acid phosphorylation; transcription initiation from RNA polymerase II promoter