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Semin Cancer Biol. 1999 Oct;9(5):339-47.

Relationships between chromatin organization and DNA methylation in determining gene expression.

Author information

1
Laboratory of Molecular Embryology, Nat'l Inst. of Child Health and Human Development, NIH, Bldg. 18T, Rm. 106, Bethesda, MD 20892-5431, USA.

Abstract

Chromatin is the natural substrate for the control of gene expression. Chromatin contains DNA, the transcriptional machinery and structural proteins such as histones. Recent advances demonstrate that transcriptional activity of a gene is largely controlled by the packaging of the template within chromatin. The covalent modification of chromatin provides an attractive mechanism for establishing and maintaining stable states of gene activity. DNA methylation and histone acetylation alter the nucleosomal infrastructure to repress or activate transcription. These covalent modifications have causal roles in both promoter-specific events and the global control of chromosomal activity. DNA methylation and histone acetylation have a major impact in both oncogenic transformation and normal development.

PMID:
10547342
DOI:
10.1006/scbi.1999.0134
[Indexed for MEDLINE]

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