Chromatin remodeling by ATP-dependent molecular machines
- PMID: 14635254
- DOI: 10.1002/bies.10359
Chromatin remodeling by ATP-dependent molecular machines
Abstract
The eukaryotic genome is packaged into a periodic nucleoprotein structure termed chromatin. The repeating unit of chromatin, the nucleosome, consists of DNA that is wound nearly two times around an octamer of histone proteins. To facilitate DNA-directed processes in chromatin, it is often necessary to rearrange or to mobilize the nucleosomes. This remodeling of the nucleosomes is achieved by the action of chromatin-remodeling complexes, which are a family of ATP-dependent molecular machines. Chromatin-remodeling factors share a related ATPase subunit and participate in transcriptional regulation, DNA repair, homologous recombination and chromatin assembly. In this review, we provide an overview of chromatin-remodeling enzymes and discuss two possible mechanisms by which these factors might act to reorganize nucleosome structure.
Copyright 2003 Wiley Periodicals, Inc.
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