Second, σ strictly requires the ATP hydrolysis activity of an activating transcription factor (TF) for the formation of open promoter complex.
Kinase activation is triggered by the appearance of an activating lipid, either diacylglycerol (DAG) or phorbol ester.
Importantly, the L1-deleted receptor was constitutively active, which may be the first example of an activating mutation (albeit a domain deletion) in the ECD of a (nearly) full-length IGF1R.
Canonical activation of the Wnt/β-catenin pathway begins with the binding of an activating Wnt protein to membrane receptors, followed by downstream cytoplasmic events that lead to stabilization of β-catenin, facilitating transport to the nucleus and transcriptional activation of target genes.
One of early examples of an activating mutation includes the protein Ras which has been found to be constitutively active due to a mutation in the corresponding gene.
For chemists, the use of an activating group is a common strategy and adenylate enzymes are exemplars of this approach.
Reuther, G. W., Lambert, Q. T., Caligiuri, M. A. & Der, C. J. Identification and characterization of an activating TrkA deletion mutation in acute myeloid leukemia.
Binding of an activating ligand enables the receptor to catalyze the exchange of GTP for GDP in a heterotrimeric G protein.
One, a short stretch of DNA called a CpG oligonucleotide, works with other nearby immune cells to amplify the expression of an activating receptor called OX40 on the surface of the T cells.
In the case of constitutively nuclear receptors, they are engineered for cytoplasmic retention in the absence of an activating signal by fusing them to specific regions of the glucocorticoid receptor, which is found predominantly in the cytoplasm of cultured cells.
OSAS tends to exhibit an increased motor cortex inhibition, which is reduced in RLS; intracortical excitability seems to be in favor of an "activating" profile in chronic insomnia and in sleep-deprived healthy individuals.
