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The B-cell CLL/lymphoma 7 (BCL7) protein family members drive gene expression changes via interactions with the Brahma Related Gene 1 (BRG1) Helicase-Sant Associated domain (HSA) domain

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Homo sapiens

PROVIDER: GSE188730 | GEO | 2022/11/17

REPOSITORIES: GEO

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The B-cell CLL/lymphoma 7 (BCL7) protein family members drive gene expression changes via interactions with the Brahma Related Gene 1 (BRG1) Helicase-Sant Associated domain (HSA) domain [BCL7 knockdown]

Project description:The SWI/SNF complex remodels chromatin in an ATP-dependent manner through the ATPase subunits BRG1 and Brm Chromatin remodeling alters nucleosome structure to change gene expression. However, aberrant remodeling and gene expression can result in cancer. We identified a family of SWI/SNF complex members, the BCL7 proteins, as critical components to drive BRG1-dependent gene expression changes. The BCL7 proteins have been implicated in B-cell lymphoma, but the characterization of their functional role within the SWI/SNF complex has not been fully explored. This study implicates their critical function alongside BRG1 to cause large scale changes in gene expression. Mechanistically, the BCL7 proteins bind to the HSA domain of BRG1 and require this domain for stable protein expression and binding to chromatin. These results provide a link between the HSA domain and the formation of a stable functional SWI/SNF remodeling complex through the interaction with the BCL7 proteins. The data shown here highlights the importance of proper formation of the SWI/SNF complex to drive critical biological functions, as losses of members that were once considered minor accessory components can cause severe loss of complex function.

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The B-cell CLL/lymphoma 7 (BCL7) protein family members drive gene expression changes via interactions with the Brahma Related Gene 1 (BRG1) Helicase-Sant Associated domain (HSA) domain [LongTerm]

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The B-cell CLL/lymphoma 7 (BCL7) protein family members drive gene expression changes via interactions with the Brahma Related Gene 1 (BRG1) Helicase-Sant Associated domain (HSA) domain [24 hours]

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The B-cell CLL/lymphoma 7 (BCL7) protein family members drive gene expression changes via interactions with the Brahma Related Gene 1 (BRG1) Helicase-Sant Associated domain (HSA) domain [CUT&RUN]

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BRG1 HSA domain interactions with BCL7 proteins are critical for remodeling and gene expression.

Project description:The SWI/SNF complex remodels chromatin in an ATP-dependent manner through the subunits BRG1 and BRM. Chromatin remodeling alters nucleosome structure to change gene expression; however, aberrant remodeling can result in cancer. We identified BCL7 proteins as critical SWI/SNF members that drive BRG1-dependent gene expression changes. BCL7s have been implicated in B-cell lymphoma, but characterization of their functional role within the SWI/SNF complex has been limited. This study implicates their function alongside BRG1 to drive large-scale changes in gene expression. Mechanistically, the BCL7 proteins bind to the HSA domain of BRG1 and require this domain for binding to chromatin. BRG1 proteins without the HSA domain fail to interact with the BCL7 proteins and have severely reduced chromatin remodeling activity. These results link the HSA domain and the formation of a functional SWI/SNF remodeling complex through the interaction with BCL7 proteins. These data highlight the importance of correct formation of the SWI/SNF complex to drive critical biological functions, as losses of individual accessory members or protein domains can cause loss of complex function.

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Project description:The B-cell CLL/lymphoma 7 (BCL7) protein family members drive gene expression changes via interactions with the Brahma Related Gene 1 (BRG1) Helicase-Sant Associated domain (HSA) domain [BCL7 knockdown]

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The B-cell CLL/lymphoma 7 (BCL7) protein family members drive gene expression changes via interactions with the Brahma Related Gene 1 (BRG1) Helicase-Sant Associated domain (HSA) domain

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