The logic of chromatin architecture and remodelling at promoters.
The regulation of gene transcription involves a dynamic balance between packaging regulatory sequences into chromatin and allowing transcriptional regulators access to these sequences. Access is restricted by the nucleosomes, but these can be repositioned or ejected by enzymes known as nucleosome remodellers. In addition, the DNA sequence can impart stiffness or curvature to the DNA, thereby affecting the position of nucleosomes on the DNA, influencing particular promoter 'architectures'. Recent genome-wide studies in yeast suggest that constitutive and regulated genes have architectures that differ in terms of nucleosome position, turnover, remodelling requirements and transcriptional noise.
Cairns
Bradley R
BR
Department of Oncological Sciences, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, Utah 84112, USA. brad.cairns@hci.utah.edu
D002843:Chromatin / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism*; D042002:Chromatin Assembly and Disassembly; D005786:Gene Expression Regulation; D011401:Promoter Regions, Genetic / Q000235:genetics*; D012319:RNA Polymerase II / Q000378:metabolism; D014158:Transcription, Genetic
D002843:Chromatin; D012319:RNA Polymerase II