The reduction in repression activity of K25 and K87, since do not seem to be sumoylation sites, might be due to a different mechanism, such as alteration in DNA/protein binding.
There was a gradual reduction in repression level with an increasing parasite number per Huh7 cell.
Chromatin immunoprecipitation (ChIP) assays were employed to determine whether HDAC3 reduction of repression by PLZF was reflected by decreases in the occupancy of PLZF binding site.
However, the lack of both compounds for one and three days resulted in a 1.3- to 2.8-fold reduction in the repression of the gene.
Deletion of exon 1 (Foxp3Δe1), which disrupts c-Rel binding (Fig. 2), led to a marked, albeit not complete, reduction in the repression of c-Rel induced NF-κB activation (Fig. 5A).
In these rescue experiments, we observed reduction of reporter repression also in RIC, again probably by the effect of overexpression.
DNMT1-deficient embryos and cells show a generalised genomic hypomethylation and a reduction in gene repression [31,52,53].
This is in disagreement with our data which show that cells without BRCA1 are particularly sensitive to EZH2 reduction, suggesting that repression of Brca1 is not the main oncogenic function of EZH2.
However, we observed a significant reduction in this repression when the PumW783G construct was transfected (Fig. 3B,C), even though the wild-type and mutant Pum proteins accumulate to similar levels (Fig. 3B), suggesting that this residue is important for full repression.
However, the change in mitochondrial transcripts of tor1 Δ strains might represent a reduction of glucose repression, which is known to induce mitochondrial transcription [ 27, 28] and mimic the effects of tor1 Δ on respiration and CLS based on our previous study [ 18].
However, if LPS challenge was delayed for 30 min there was a 50% reduction in IL-6 repression, and after delaying LPS challenge for 3 h, there was no observable repression of IL-6 synthesis.
