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ARID1A regulates condensin II distribution and chromosomal partition [RNA-seq]

ABSTRACT: ARID1A, a subunit of the switch/sucrose non-fermentable (SWI/SNF) chromatin remodeling complex, influences gene accessibility. However, the role of ARID1A in spatial genomic organization and chromosomal interaction remains elusive. We showed that the SWI/SNF complex interacts with condensin II and they show significant overlapping distributions in enhancers. ARID1A inactivation drives redistribution of condensin II preferentially at enhancers without affecting the interaction between the SWI/SNF and condensing II complexes. ARID1A and condensin II contribute to transcriptionally inactive B compartments, while ARID1A weakens the borders of topologically associated domains. ARID1A inactivation decreases the frequency of genomic interactions over distance, but increases the intermixing of interphase small chromosomes, which was validated by three dimensional chromosome painting. These results demonstrated ARID1A spatially partitions genome and chromosomes.

ORGANISM(S): Homo sapiens

PROVIDER: GSE120057 | GEO | 2019/05/21

REPOSITORIES: GEO

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ARID1A regulates condensin II distribution and chromosomal partition [HiC]

Project description:ARID1A, a subunit of the switch/sucrose non-fermentable (SWI/SNF) chromatin remodeling complex, influences gene accessibility. However, the role of ARID1A in spatial genomic organization and chromosomal interaction remains elusive. We showed that the SWI/SNF complex interacts with condensin II and they show significant overlapping distributions in enhancers. ARID1A inactivation drives redistribution of condensin II preferentially at enhancers without affecting the interaction between the SWI/SNF and condensing II complexes. ARID1A and condensin II contribute to transcriptionally inactive B compartments, while ARID1A weakens the borders of topologically associated domains. ARID1A inactivation decreases the frequency of genomic interactions over distance, but increases the intermixing of interphase small chromosomes, which was validated by three dimensional chromosome painting. These results demonstrated ARID1A spatially partitions genome and chromosomes.

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