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  1. ...and RNAprocessing functions, while the distal class tended toward cell division and metabolic processes (Supplemental Data). Themost striking observation was in the silent class, which is strongly enriched in developmental regulators and genes subject to Polycomb-mediated repression in stem cells and other tissues...
  2. ...is accomplished by enhanced Polycomb recruitment both to PREs and to target promoters of repressed genes. These results suggest that the stability of multifactor complexes at promoters and regulatory elements is a crucial aspect of developmentally regulated gene expression. Footnotes ↵ 7...
  3. ...K27me3 at the NP stage are not significantly transcriptionally up-regulated (Supplemental Fig. 10). We thus conclude that the crosstalk between REST and the Polycomb pathway is independent of transcriptional changes at a substantial number of REST targets. Promoter fragments containing REST or SNAIL...
  4. ...by trimethylation of lysine 27 on histone 3 (H3K27me3), is associated with RNA Pol II proximal promoter pausing. Recently, the Polycomb repressive complex II (PRC2) has been shown to act as a master regulator of transcriptional repression through RNA Pol II proximal promoter pausing in mouse embryonic stem cells...
  5. ...aligned TSSs of sharp and broad promoters using the WebLogo sequence analysis tool (Fig. 2A; Crooks et al. 2004). As in other organisms (Zhang and Dietrich 2005; Carninci et al. 2006), we found that transcription preferentially initiated at the adenine of a TCA sequence, with a stronger preference...
  6. ...with distinct chromatin state preferences. The data also highlight the stringency of the Polycomb regulatory network, and show association of the Trithorax-like (Trl) protein with hotspots of DNA binding throughout development. Furthermore, the data identify more than 5800 instances in which TRFs target DNA...
  7. ...of H3K4me3 modification is unremarkable (Fig. 5A). Regions with moderate CG methylation reduction exhibit concomitant decreases in H3K27me3. These regions include immune response genes, genes involved in cell adhesion, and Hox genes; the latter had been previously reported to display reduced Polycomb...
  8. ..., the profiles of Drosophila polycomb proteins look strikingly different if ChIP-chip (modEncode) and ChiP-seq (Enderle et al. 2011) profiles are compared, with loss of broad distributions in ChIP-seq data. It is possible that cases like the one we describe are confined to ribonucleoprotein assemblies...
  9. ...of genes in A. thaliana (Zhang et al. 2007). Importantly, most H3K27me3-targeted genes are expressed in a tissue-specific manner (Zhang et al. 2007; Lafos et al. 2011). Since Polycomb-mediated repression can be easily reversed, H3K27me3 may facilitate the repression of these genes in appropriate tissues...
  10. ...the process of transcription as the nascent RNA strand exits RNA polymerase II (Pol II) and hybridizes to the template DNA strand (Ginno et al. 2012; Sanz et al. 2016). In addition, recent studies showed that some long noncoding RNAs (lncRNAs) can associate to distant genomic regions through the formation...
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