However, because MafK lacks a transactivation domain, it regulates transcription through interaction with the cap'n'collar (CNC) bZIP proteins, including Nrf2 and Bach1 (Toki et al., 2005; Igarashi and Sun, 2006; Blank, 2008).
Perhaps the most important question moving forward is to identify the Shh-regulated ligand that mediates the communication between Ptch1 and Smo and to understand how it regulates Smo through the 7TM and CRD sites.
For JAM-A, there is good evidence that it regulates TJ formation through its direct association with the scaffolding protein PAR-3 (Ebnet et al. 2001; Itoh et al. 2001).
The main response to VEGF in vivo is mediated by VEGF receptor-2 (VEGFR2) and the way it regulates angiogenesis is through VEGFR2 expression and its activation in cells.
ERK1/2 acts at synaptic level where it regulates neurotransmitter release through modulation of the activity of synaptic proteins or ionic channels, and changes in dendritic spine structure [30] [33].
It regulates gene expression through a variety of transcription factors [ 1, 6].
It regulates synaptic efficiency through the modulation of key neurotransmitter systems previously shown to be involved in ED.
The Tsk-1 model of cutaneous fibrosis, for example, illustrates the importance of Tsk fibrillin and how it regulates gene expression through altered interactions with other matrix proteins.
It regulates gene transcription through nuclear estrogen receptor α (ERα) via 2 activation functions, AF1 and AF2, and can also activate membrane ERα.
SynI is not necessary for synaptic transmission, but it regulates synaptic strength through pre- and post-docking actions on SV trafficking that have different impact on excitatory and inhibitory transmission (see 1, for review), similar to what has been described for neuroligins (38).
