Regulation of Chromatin Remodeling by Inositol Polyphosphates

Author:

Steger David J.1,Haswell Elizabeth S.1,Miller Aimee L.2,Wente Susan R.2,O'Shea Erin K.1

Affiliation:

1. Department of Biochemistry and Biophysics, Howard Hughes Medical Institute, University of California, San Francisco, 513 Parnassus Avenue, San Francisco, CA 94143–0448, USA.

2. Department of Cell and Developmental Biology, Vanderbilt University Medical Center, 3120A MRBIII, Nashville, TN 37212, USA.

Abstract

Chromatin remodeling is required for efficient transcription of eukaryotic genes. In a genetic selection for budding yeast mutants that were defective in induction of the phosphate-responsive PHO5 gene, we identified mutations in ARG82/IPK2 , which encodes a nuclear inositol polyphosphate kinase. In arg82 mutant strains, remodeling of PHO5 promoter chromatin is impaired, and the adenosine triphosphate–dependent chromatin-remodeling complexes SWI/SNF and INO80 are not efficiently recruited to phosphate-responsive promoters. These results suggest a role for the small molecule inositol polyphosphate in the regulation of chromatin remodeling and transcription.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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