Journal
CELL
Volume 102, Issue 2, Pages 257-265Publisher
CELL PRESS
DOI: 10.1016/S0092-8674(00)00030-1
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Germline mutations in the tumor suppressor gene, BRCA1, predispose individuals to breast and ovarian cancers. Using a combination of affinity- and conventional chromatographic techniques, we have isolated a predominant form of a multiprotein BRCA1-containing complex from human cells displaying chromatin-remodeling activity. Mass spectrometric sequencing of components of this complex indicated that BRCA1 is associated with a SWI/SNF-related complex. We show that BRCA1 can directly interact with the BRG1 subunit of the SWI/SNF complex. Moreover, p53-mediated stimulation of transcription by BRCA1 was completely abrogated by either a dominant-negative mutant of BRG1 or the cancer-causing deletion in exon 11 of BRCA1. These findings reveal a direct function for BRCA1 in transcriptional control through modulation of chromatin structure.
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