Publication: Adventitious changes in long-range gene expression caused by polymorphic structural variation and promoter competition
1
Issued Date
2009-12-22
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ISSN
10916490
00278424
00278424
Other identifier(s)
2-s2.0-76049106672
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Mahidol University
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SCOPUS
Bibliographic Citation
Proceedings of the National Academy of Sciences of the United States of America. Vol.106, No.51 (2009), 21771-21776
Suggested Citation
Karen M. Lower, Jim R. Hughes, Marco De Gobbi, Shirley Henderson, Vip Viprakasit, Chris Fisher, Anne Goriely, Helena Ayyub, Jackie Sloane-Stanley, Douglas Vernimmen, Cordelia Langford, David Garrick, Richard J. Gibbons, Douglas R. Higgs Adventitious changes in long-range gene expression caused by polymorphic structural variation and promoter competition. Proceedings of the National Academy of Sciences of the United States of America. Vol.106, No.51 (2009), 21771-21776. doi:10.1073/pnas.0909331106 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/28379
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Title
Adventitious changes in long-range gene expression caused by polymorphic structural variation and promoter competition
Abstract
It is well established that all of the cis-acting sequences required for fully regulated human α-globin expression are contained within a region of ≈120 kb of conserved synteny. Here, we show that activation of this cluster in erythroid cells dramatically affects expression of apparently unrelated and noncontiguous genes in the 500 kb surrounding this domain, including a gene (NME4) located 300 kb from the α-globin cluster. Changes in NME4 expression are mediated by physical cis-interactions between this gene and the α-globin regulatory elements. Polymorphic structural variation within the globin cluster, altering the number of α-globin genes, affects the pattern of NME4 expression by altering the competition for the shared α-globin regulatory elements. These findings challenge the concept that the genome is organized into discrete, insulated regulatory domains. In addition, this work has important implications for our understanding of genome evolution, the interpretation of genome-wide expression, expression-quantitative trait loci, and copy number variant analyses.