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Open AccessJournal ArticleDOI

The Polycomb complex PRC2 and its mark in life

Raphaël Margueron, +1 more
- 20 Jan 2011 - 
- Vol. 469, Iss: 7330, pp 343-349
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TLDR
This work has uncovered a role for non-coding RNA in the recruitment of PRC2 to target genes, and expanded the perspectives on its function and regulation.
Abstract
Polycomb group proteins maintain the gene-expression pattern of different cells that is set during early development by regulating chromatin structure. In mammals, two main Polycomb group complexes exist — Polycomb repressive complex 1 (PRC1) and 2 (PRC2). PRC1 compacts chromatin and catalyses the monoubiquitylation of histone H2A. PRC2 also contributes to chromatin compaction, and catalyses the methylation of histone H3 at lysine 27. PRC2 is involved in various biological processes, including differentiation, maintaining cell identity and proliferation, and stem-cell plasticity. Recent studies of PRC2 have expanded our perspectives on its function and regulation, and uncovered a role for non-coding RNA in the recruitment of PRC2 to target genes.

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Cancer epigenetics: from mechanism to therapy.

TL;DR: The basic principles behind DNA methylation, histone modification, nucleosome remodeling, and RNA-mediated targeting are presented and the evidence suggesting that their misregulation can culminate in cancer is highlighted.
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The molecular hallmarks of epigenetic control

TL;DR: A personal perspective on the development of epigenetics, from its historical origins to what is defined as 'the modern era of epigenetic research', is provided.
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The emergence of lncRNAs in cancer biology.

TL;DR: This review highlights the emerging impact of ncRNAs in cancer research, with a particular focus on the mechanisms and functions of lncRNAs.
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The genetic basis of early T-cell precursor acute lymphoblastic leukaemia

Jinghui Zhang, +73 more
- 12 Jan 2012 - 
TL;DR: The mutational spectrum is similar to myeloid tumours, and moreover, the global transcriptional profile of ETP ALL was similar to that of normal andMyeloid leukaemia haematopoietic stem cells, suggesting that addition of myeloids-directed therapies might improve the poor outcome of E TP ALL.
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Transcriptional Regulation and Its Misregulation in Disease

TL;DR: Recent advances in understanding of transcriptional regulation are reviewed and how these have provided new insights into transcriptional misregulation in disease are discussed.
References
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Journal ArticleDOI

High-resolution profiling of histone methylations in the human genome.

TL;DR: High-resolution maps for the genome-wide distribution of 20 histone lysine and arginine methylations as well as histone variant H2A.Z, RNA polymerase II, and the insulator binding protein CTCF across the human genome using the Solexa 1G sequencing technology are generated.
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A Bivalent Chromatin Structure Marks Key Developmental Genes in Embryonic Stem Cells

TL;DR: It is proposed that bivalent domains silence developmental genes in ES cells while keeping them poised for activation, highlighting the importance of DNA sequence in defining the initial epigenetic landscape and suggesting a novel chromatin-based mechanism for maintaining pluripotency.
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Functional Demarcation of Active and Silent Chromatin Domains in Human HOX Loci by Noncoding RNAs

TL;DR: The transcriptional landscape of the four human HOX loci is characterized at five base pair resolution in 11 anatomic sites and 231 HOX ncRNAs are identified that extend known transcribed regions by more than 30 kilobases, suggesting transcription of ncRNA may demarcate chromosomal domains of gene silencing at a distance.
Journal ArticleDOI

A gene complex controlling segmentation in Drosophila.

TL;DR: The wild-type and mutant segmentation patterns are consistent with an antero-posterior gradient in repressor concentration along the embryo and a proximo-distal gradient along the chromosome in the affinities for repressor of each gene's cis-regulatory element.
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