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Cell Rep. 2014 Mar 27;6(6):973-981. doi: 10.1016/j.celrep.2014.02.012. Epub 2014 Mar 6.

BAF180 promotes cohesion and prevents genome instability and aneuploidy.

Author information

1
MRC Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton BN1 9RQ, UK.
2
MRC Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton BN1 9RQ, UK. Electronic address: j.a.downs@sussex.ac.uk.

Abstract

BAF180, a subunit of the PBAF chromatin remodeling complex, is frequently mutated in cancer. Although PBAF regulates transcription, it remains unclear whether this is what drives tumorigenesis in cells lacking BAF180. Based on data from yeast, we hypothesized that BAF180 may prevent tumorigenesis by promoting cohesion. Here, we show BAF180 is required for centromeric cohesion in mouse and human cells. Mutations identified in tumor samples are unable to support this activity, and also compromise cohesion-dependent functions in yeast. We provide evidence of genome instability in line with loss of cohesion, and importantly, we find dynamic chromosome instability following DNA damage in cells lacking BAF180. These data demonstrate a function for BAF180 in promoting genome stability that is distinct from its well-characterized role in transcriptional regulation, uncovering a potent mechanism for its tumor-suppressor activity.

PMID:
24613357
PMCID:
PMC3988838
DOI:
10.1016/j.celrep.2014.02.012
[Indexed for MEDLINE]
Free PMC Article

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