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A lag in nascent strand DNA methylation contributes to heterogeneous methylation in asynchronous cell populations, but cancer cells and active transcription factor binding sites preserve heterogeneity even after cell cycle arrest.
Using Akron-seq, a novel approach that captures native 3′ and 5′ ends of capped and polyadenylated RNAs, Mourelatos and colleagues show that mRNAs are subject to repeated cotranslational endonucleolytic cuts at the ribosome exit channel.
Although mechanisms wherein pre-existing H3K27 methylation directs recruitment of PRC2 to support its own maintenance have been proposed, H3K27 methylation patterns in mESCs are not dependent on self-autonomous epigenetic inheritance.
Nanobodies have emerged as highly versatile and useful binding molecules in biomedical research. A technical report describes a cost- and time-effective in vitro platform that facilitates the generation of desired nanobodies, including conformationally selective nanobodies against agonist-bound G-protein-coupled receptors (GPCRs).
Inheritance of Polycomb repressive complex 2 (PRC2)-mediated gene silencing involves self-propagation of histone H3 lysine 27 (H3K27) methylation from an initial nucleation site, but how the first H3K27 methylation marks are established is not fully understood. A recent study reveals that PRC2 can reconstitute H3K27 methylation de novo in cells that have lost the mark. This reconstitution is dependent on the PRC2 core component SUZ12, which provides a novel link between initiation and self-propagation of this critical epigenetic mark.
A new study reveals how the oocyte-specific transcription factor TAp63 ensures female germ line fidelity and describes approaches to circumvent premature ovarian insufficiency in women receiving cytotoxic chemotherapy.
Transcripts with highly complementary sequences can target microRNAs (miRNAs) for degradation, but the physiological relevance of target-directed miRNA degradation (TDMD) has remained unclear. Bitetti et al. now identify a conserved vertebrate RNA that induces TDMD in the cerebellum of zebrafish and mouse to promote wild-type animal behaviors.
Chd1 is a highly conserved chromatin remodeler found across all eukaryotic species. A recent study shows the structural changes that take place when yeast Chd1 binds to its nucleosomal substrate and reveals how they relate to remodeler function.
This January 2018 issue starts the 25th year of NSMB’s journey. We mark the occasion by launching a special series that celebrates the exciting research uncovering the fundamental principles behind biological processes.