Abstract
The processes of eukaryotic development and cellular differentiation are under transcriptional and epigenetic control by essentially the same mechanisms in all multi-cellular organisms. Here we briefly summarise the general principles of chromatin structure and gene regulation. Because the bulk of the chromatin in the nucleus exists in a highly condensed state, the main level at which gene expression is controlled is at the level of the accessibility of genes and their regulatory elements to the transcription apparatus. In this article we will describe the complex machinery that covalently modifies the DNA and histones, remodels chromatin structure and allows transcription factors to find their targets within regulatory elements. We will establish the concept that epigenetic and transcriptional regulation involves a finely tuned balance between activators and repressors, which function via a huge variety of mechanisms to either introduce or erase modifications to the basic chromatin template.
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Bonifer, C., Cockerill, P.N. (2014). The Epigenetic Regulatory Machinery. In: Bonifer, C., Cockerill, P. (eds) Transcriptional and Epigenetic Mechanisms Regulating Normal and Aberrant Blood Cell Development. Epigenetics and Human Health. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-45198-0_1
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DOI: https://doi.org/10.1007/978-3-642-45198-0_1
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