Words similar to coactivator
Example sentences for: coactivator
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Stat3 also contains in its N-terminus one of this motifs ( 221LAGLL 225) [ 39 ] . Moreover, Stat3 also presents a Ser at -2 position of the LXXLL sequence, which in the case of the coactivator TRBP defines selectivity for nuclear receptors [ 40 ] . Phosphorylation of Stat3 has been reported to occur only in 705Tyr and in 727Ser, allowing dimerization and full transactivating activity [ 41 ] . Whether this 219Ser next to the LXXLL motif is involved in the coactivator activity of Stat3, and the interaction of Stat3 with other coactivators only takes place in the context of Stat3 transcription factor activity or also can be part of the general mechanism of the transcription complex formation requires further studies.
PGC1-α, a transcriptional coactivator of nuclear receptors important to the regulation of a number of mitochondrial genes involved in oxidative metabolism, directly interacts with MEF2 to synergistically activate selective ST muscle genes and also serves as a target for calcineurin signaling (Lin et al.
The unliganded LBD recognizes hydrophobic motifs, termed interaction domains (IDs), which are reiterated three times in N-CoR and twice in SMRT and conform to the consensus L/IXXIIXXXL [ 4 ] (see also [ 16 ] ). By contrast, the liganded LBD binds shorter hydrophobic motifs termed NR boxes that are reiterated several times within each coactivator and conform to the consensus LXXLL.
Indeed, as P-TEFb is a coactivator of potent activators that mediate effects of enhancers and can itself activate transcription when placed on sites distal to promoter elements [15], it might mediate many more signaling events than those of heat shock, ultraviolet light, stress, and hypertrophy.
RAR/RXR binding to nuclear receptor corepressors such as NCoR and SMRT in the absence of ligand inhibits activation of RA responsive genes [ 3 4 ] . Ligand binding displaces the repressors and recruits coactivator proteins such as CBP which have histone acetyltransferase activity [ 5 ] . Histone acetylation allows for chromatin unwinding and transcriptional initiation of target gene expression [ 6 ] .