Journal
CURRENT OPINION IN CELL BIOLOGY
Volume 20, Issue 3, Pages 349-355Publisher
CURRENT BIOLOGY LTD
DOI: 10.1016/j.ceb.2008.04.007
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Funding
- NIGMS NIH HHS [R01 GM058839-10, R01 GM058839] Funding Source: Medline
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Dosage compensation, the mechanism by which organisms equalize the relative gene expression of dimorphic sex chromosomes, requires action of a diverse range of epigenetic mechanisms. The mammalian form, 'named X-chromosome inactivation' (XCI), involves silencing of one X chromosome in the female cell and regulation by genes that make noncoding RNAs (ncRNA). With large-scale genomic and transcriptome studies pointing to a crucial role for noncoding elements in organizing the epigenome, XCI emerges as a major paradigm and a focus of active research worldwide. With more surprising twists, recent advances point to the significance of RNA-directed chromatin change, chromosomal trans-interactions, nuclear organization, and evolutionary change. These findings have impacted our understanding of general gene regulation and are discussed herein.
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