DNA methylation of the first exon is tightly linked to transcriptional silencing.

ABSTRACT: Tissue specific patterns of methylated cytosine residues vary with age, can be altered by environmental factors, and are often abnormal in human disease yet the cellular consequences of DNA methylation are incompletely understood. Although the bodies of highly expressed genes are often extensively methylated in plants, the relationship between intragenic methylation and expression is less clear in mammalian cells. We performed genome-wide analyses of DNA methylation and gene expression to determine how the pattern of intragenic methylation correlates with transcription and to assess the relationship between methylation of exonic and intronic portions of the gene body. We found that dense exonic methylation is far more common than previously recognized or expected statistically, yet first e

SUBMITTER: Brenet F 

PROVIDER: S-EPMC3022582 | biostudies-literature | 2011 Jan

REPOSITORIES: biostudies-literature