Mastermind-like proteins are transcriptional coactivators that were first described as integral part of the Notch signalling pathway [1] but also involved in Wnt/beta-catenin, Sonic Hh and Hippo pathways [4]. MAML family consists of MAML1, 2 and 3, w ...
Mastermind-like proteins are transcriptional coactivators that were first described as integral part of the Notch signalling pathway [1] but also involved in Wnt/beta-catenin, Sonic Hh and Hippo pathways [4]. MAML family consists of MAML1, 2 and 3, which have a conserved N-terminal basic domain (Pfam:PF09596) but their amino acid sequence outside this region is more divergent which suggests that MAML2 and MAML3 may have different functions. This entry represents the transactivation domain 2 (TAD2) found at the C-terminal of Mastermind-like protein 1/3 (MAML1/3). TAD2 from MAML1 enhances the phosphorylation of CBP/p300 and ICN, required for Notch induced transcription [1-4]. This is a glutamine rich domain that govern the MAML1 transcriptional activity [1]. This domain directly recruits the cyclin C:CDK8 (cyclin-dependent kinase 8) complex that inhibits Notch signalling by promoting phosphorylation-dependent ubiquitination of nuclear ICN and its sequential proteasomal degradation [4].