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Title: Tissue-specific SMARCA4 binding at active and repressed regulatory elements during embryogenesis

Abstract

The SMARCA4 (also known as BRG1 in humans) chromatin remodeling factor is critical for establishing lineage-specific chromatin states during early mammalian development. However, the role of SMARCA4 in tissue-specific gene regulation during embryogenesis remains poorly defined. To investigate the genome-wide binding landscape of SMARCA4 in differentiating tissues, we engineered a Smarca4FLAG knock-in mouse line. Using ChIP-seq, we identified ~51,000 SMARCA4- associated regions across six embryonic mouse tissues (forebrain, hindbrain, neural tube, heart, limb, and face) at midgestation (E11.5). The majority of these regions was distal from promoters and showed dynamic occupancy, with most distal SMARCA4 sites (73%) confined to a single or limited subset of tissues. To further characterize these regions, we profiled active and repressive histone marks in the same tissues and examined the intersection of informative chromatin states and SMARCA4 binding. This revealed distinct classes of distal SMARCA4-associated elements characterized by activating and repressive chromatin signatures that were associated with tissue-specific up- or down-regulation of gene expression and relevant active/repressed biological pathways. We further demonstrate the predicted active regulatory properties of SMARCA4- associated elements by retrospective analysis of tissue-specific enhancers and direct testing of SMARCA4-bound regions in transgenic mouse assays. Our results indicate a dual active/repressive function ofmore » SMARCA4 at distal regulatory sequences in vivo and support its role in tissue-specific gene regulation during embryonic development.« less

Authors:
 [1];  [1];  [1];  [2];  [3];  [4];  [5];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [5];  [4];  [6];  [6];  [6]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Genomics Division
  2. USDOE Joint Genome Institute (JGI), Walnut Creek, CA (United States)
  3. USDOE Joint Genome Institute (JGI), Walnut Creek, CA (United States); Univ. of Cambridge (United Kingdom). NHS Trust. Addenbrooke's Hospital
  4. Harvard Medical School, Boston, MA (United States); Massachusetts General Hospital, Boston, MA (United States). HHMI. Dept. of Pathology
  5. Univ. of California, San Diego, La Jolla, CA (United States). School of Medicine. Ludwig Inst. for Cancer Research
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Genomics Division; USDOE Joint Genome Institute (JGI), Walnut Creek, CA (United States)
Publication Date:
Research Org.:
Univ. of California, Oakland, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
OSTI Identifier:
1625630
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Genome Research
Additional Journal Information:
Journal Volume: 24; Journal Issue: 6; Journal ID: ISSN 1088-9051
Publisher:
Cold Spring Harbor Laboratory Press
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity

Citation Formats

Attanasio, Catia, Nord, Alex S., Zhu, Yiwen, Blow, Matthew J., Biddie, Simon C., Mendenhall, Eric M., Dixon, Jesse, Wright, Crystal P, Hosseini, Roya, Akiyama, Jennifer A., Holt, Amy, Plajzer-Frick, Ingrid, Shoukry, Malak, Afzal, Veena, Ren, Bing, Bernstein, Bradley E., Rubin, Edward M., Visel, Axel, and Pennacchio, Len A. Tissue-specific SMARCA4 binding at active and repressed regulatory elements during embryogenesis. United States: N. p., 2014. Web. doi:10.1101/gr.168930.113.
Attanasio, Catia, Nord, Alex S., Zhu, Yiwen, Blow, Matthew J., Biddie, Simon C., Mendenhall, Eric M., Dixon, Jesse, Wright, Crystal P, Hosseini, Roya, Akiyama, Jennifer A., Holt, Amy, Plajzer-Frick, Ingrid, Shoukry, Malak, Afzal, Veena, Ren, Bing, Bernstein, Bradley E., Rubin, Edward M., Visel, Axel, & Pennacchio, Len A. Tissue-specific SMARCA4 binding at active and repressed regulatory elements during embryogenesis. United States. https://doi.org/10.1101/gr.168930.113
Attanasio, Catia, Nord, Alex S., Zhu, Yiwen, Blow, Matthew J., Biddie, Simon C., Mendenhall, Eric M., Dixon, Jesse, Wright, Crystal P, Hosseini, Roya, Akiyama, Jennifer A., Holt, Amy, Plajzer-Frick, Ingrid, Shoukry, Malak, Afzal, Veena, Ren, Bing, Bernstein, Bradley E., Rubin, Edward M., Visel, Axel, and Pennacchio, Len A. Mon . "Tissue-specific SMARCA4 binding at active and repressed regulatory elements during embryogenesis". United States. https://doi.org/10.1101/gr.168930.113. https://www.osti.gov/servlets/purl/1625630.
@article{osti_1625630,
title = {Tissue-specific SMARCA4 binding at active and repressed regulatory elements during embryogenesis},
author = {Attanasio, Catia and Nord, Alex S. and Zhu, Yiwen and Blow, Matthew J. and Biddie, Simon C. and Mendenhall, Eric M. and Dixon, Jesse and Wright, Crystal P and Hosseini, Roya and Akiyama, Jennifer A. and Holt, Amy and Plajzer-Frick, Ingrid and Shoukry, Malak and Afzal, Veena and Ren, Bing and Bernstein, Bradley E. and Rubin, Edward M. and Visel, Axel and Pennacchio, Len A.},
abstractNote = {The SMARCA4 (also known as BRG1 in humans) chromatin remodeling factor is critical for establishing lineage-specific chromatin states during early mammalian development. However, the role of SMARCA4 in tissue-specific gene regulation during embryogenesis remains poorly defined. To investigate the genome-wide binding landscape of SMARCA4 in differentiating tissues, we engineered a Smarca4FLAG knock-in mouse line. Using ChIP-seq, we identified ~51,000 SMARCA4- associated regions across six embryonic mouse tissues (forebrain, hindbrain, neural tube, heart, limb, and face) at midgestation (E11.5). The majority of these regions was distal from promoters and showed dynamic occupancy, with most distal SMARCA4 sites (73%) confined to a single or limited subset of tissues. To further characterize these regions, we profiled active and repressive histone marks in the same tissues and examined the intersection of informative chromatin states and SMARCA4 binding. This revealed distinct classes of distal SMARCA4-associated elements characterized by activating and repressive chromatin signatures that were associated with tissue-specific up- or down-regulation of gene expression and relevant active/repressed biological pathways. We further demonstrate the predicted active regulatory properties of SMARCA4- associated elements by retrospective analysis of tissue-specific enhancers and direct testing of SMARCA4-bound regions in transgenic mouse assays. Our results indicate a dual active/repressive function of SMARCA4 at distal regulatory sequences in vivo and support its role in tissue-specific gene regulation during embryonic development.},
doi = {10.1101/gr.168930.113},
journal = {Genome Research},
number = 6,
volume = 24,
place = {United States},
year = {Mon Apr 21 00:00:00 EDT 2014},
month = {Mon Apr 21 00:00:00 EDT 2014}
}

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