Signaling through chromatin

Signaling to Chromatin through Histone Modifications

in Kornberg and Lorch, 1999). In the classical view, first proposed by Kornberg (1974), each nucleosomal unit is formed by wrapping approximately 146 base pairs of DNA around a histone octamer core particle containing one H3-H4 tetramer and two H2A-H2B dimers. The valid-Genetics Box 800733 ity of this model has been confirmed by determining the crystal structures of the histone octamer, As reve...

Signaling through Chromatin: Setting the Scene at Kinetochores

Histone H3 lysine 4 trimethylation needed for transcription is mediated by the Set1 methyltransferase and requires prior monoubiquitination of histone H2B. In this issue, Latham et al. (2011) report that dimethylation of the yeast kinetochore protein Dam1 by Set1 similarly requires H2B monoubiquitination. Thus, H2B ubiquitination signals for methylation beyond chromatin.

Signaling Network Model of Chromatin

We suggest that common principles underlie both cellular signaling networks and chromatin. To exemplify similarities, we focus on signaling complexes that form at membrane receptors and on nucleosomes. Multiple signal-transducing modifications on side chain residues of receptor tyrosine kinases (RTKs) and histone proteins are used to create docking sites that facilitate proximal relations of en...

The chromatin accessibility complex: chromatin dynamics through nucleosome sliding.

Notch1 counteracts WNT/β-catenin signaling through chromatin modification in colorectal cancer.

Crosstalk between the Notch and wingless-type MMTV integration site (WNT) signaling pathways has been investigated for many developmental processes. However, this negative correlation between Notch and WNT/β-catenin signaling activity has been studied primarily in normal developmental and physiological processes in which negative feedback loops for both signaling pathways are intact. We found t...