MAPK proteins modulate Apaf-1 activity, leading the activation of Rsk-1, which phosphorylates Apaf-1 at Ser268, favoring the interaction between Apaf-1 and 14-3-3ε 14-3-3ε 14-3-3εsing Apaf-1 inhibithereby
Overall, the results support a model in which leucine selectively promotes dephosphorylation of Sestrin2, causing it to dissociate from and thereby activate GATOR2, leading to activation of mTORC1.
In addition, they express elevated levels of p19Arf and show enhanced checkpoint activity, both leading to activation of p53.
Cleavage by the anthrax toxin directly activates CARD, leading to activation of caspase-1 [ 13].
TF binds and activates factor VII, leading to activation of factor X and ultimately to thrombin formation.
These results suggested that when macrophages are bound to AECs, they are activated and produce pro-fibrotic mediators, leading to activation of fibroblasts.
These data are the first descriptions of CRF leading to activation of a Gβγ-dependent signaling pathway in neurons, as well as the first description of Gβγ activation leading to downstream CREB phosphorylation in any cellular system.
The principal mechanism leading to activation of p53 in response to inhibition of PI 3-kinase is phosphorylation of the histone acetyltransferase Tip60 by GSK3, leading to acetylation and activation of p53.
The pathways activated by the two stimuli are partially overlapping, both leading to activation of NFκB and NFAT [ 59].
Alternatively, UroA/UAS03 could induce basal ROS that is dependent on expression of Cyp1A1 and leading to activation of Nrf2-pathways.
Contrary to these reports, it has been demonstrated that MLK4 can directly phosphorylate MEK leading to activation of the ERK pathway [14, 15].
