Polycomb Repressive Complex 1 Generates Discrete Compacted Domains that Change during Differentiation.

ABSTRACT: Master regulatory genes require stable silencing by the polycomb group (PcG) to prevent misexpression during differentiation and development. Some PcG proteins covalently modify histones, which contributes to heritable repression. The role for other effects on chromatin structure is less understood. We characterized the organization of PcG target genes in ESCs and neural progenitors using 5C and super-resolution microscopy. The genomic loci of repressed PcG targets formed discrete, small (20-140 Kb) domains of tight interaction that corresponded to locations bound by canonical polycomb repressive complex 1 (PRC1). These domains changed during differentiation as PRC1 binding changed. Their formation depended upon the Polyhomeotic component of canonical PRC1 and occurred independently of PRC

SUBMITTER: Kundu S 

PROVIDER: S-EPMC5421375 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature