A Few Glances at the Function of Chromatin and Nuclear Higher-Order Structure in Transcription Regulation
Gene therapy necessitates the accurate expression of a transferred gene; that is the gene has to be expressed at precise levels in the right cell at the appropriate time. Much before “Gene Therapists” started to show up in laboratories throughout the world, cells had devised a large number of mechanisms to reach that goal, that is to tightly regulate the expression of about 100,000 genes. The most common mechanism utilized by cells for controlling gene expression occurs at the transcriptional level. In this case, deciding if a gene will be transcribed or not, and adjusting the level of transcription initiation and elongation, determine the amounts of gene products. Although the cell has found it advantageous to control the expression of many genes at many other downstream steps, control at the transcriptional level prevents the synthesis of useless molecules and the utilization of further control levels.
Keywordgene therapy nucleus chromatin transcription insulator chromatin domain nucleosome chromatin remodeling histone acetylation
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