DNA methylation of remote sequences in chicken alpha-globin gene expression

Haigh, L.S.; Owens, B.B.; Ingram, V.M.

Progress in Clinical and Biological Research 134: 205-210

1983


ISSN/ISBN: 0361-7742
PMID: 6664998
Document Number: 197402
We have previously reported a correlation between site-specific DNA methylation and developmental expression of the chicken alpha-globin genes [8]. We have now extended this investigation to include sites 10-20 kb 5' to the alpha-globin cluster. These data indicate that the methylation status of DNA 5' to the globin genes can still be correlated with gene expression in red blood cells. The results suggest a possible role of DNA methylation in modifying regulatory sequences remote from the transcription initiation sites of globin genes; the existence of such remote regulatory sequences has also been indicated by some beta-thalassemia deletions and by genetic elements in other systems. Our results further correlate with known intermediate DNase I sensitivity in this region [7]. A discrete cluster of CpC type methylation is reported 5' to the alpha-globin gene cluster.

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