Raha Weigert, Sara Hetzel, Nina Bailly, Chuck Haggerty, Ibrahim A Ilik, Philip Yuk Kwong Yung, Carmen Navarro, Adriano Bolondi, Abhishek Sampath Kumar, Chiara Anania, Björn Brändl, David Meierhofer, Darío G Lupiáñez, Franz-Josef Müller, Tugce Aktas, Simon J Elsässer, Helene Kretzmer, Zachary D Smith, Alexander Meissner
DNA and Histone 3 Lysine 27 methylation typically function as repressive modifications and operate within distinct genomic compartments. In mammals, the majority of the genome is kept in a DNA methylated state, whereas the Polycomb repressive complexes regulate the unmethylated CpG-rich promoters of developmental genes. In contrast to this general framework, the extra-embryonic lineages display non-canonical, globally intermediate DNA methylation levels, including disruption of local Polycomb domains. Here, to better understand this unusual landscape's molecular properties, we genetically and chemically perturbed major epigenetic pathways in mouse trophoblast stem cells...
April 2023: Nature Cell Biology