Chromatin State Signatures Associated with Tissue-Specific Gene Expression and Enhancer Activity in the Embryonic Limb. Justin C
Downloaded from genome.cshlp.org on September 30, 2021 - Published by Cold Spring Harbor Laboratory Press Chromatin state signatures associated with tissue-specific gene expression and enhancer activity in the embryonic limb. Justin Cotney1, Jing Leng2, Sunghee Oh1+, Laura E. DeMare1, Steven K. Reilly1, Mark B. Gerstein2,3,4 and James P. Noonan1,2,5* 1. Department of Genetics, Yale University School of Medicine, New Haven, CT 06520, USA 2. Program in Computational Biology and Bioinformatics, Yale University, New Haven, CT 06520, USA. 3. Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA. 4. Department of Computer Science, Yale University, New Haven, CT 06511, USA. 5. Kavli Institute for Neuroscience, Yale University School of Medicine, New Haven, CT 06520, USA + Current address: Division of Human Genetics, Department of Pediatrics, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH 45229 *Corresponding author Running title: Chromatin states identify developmental enhancers Keywords: chromatin, enhancers, development, limb, ChIP-seq Downloaded from genome.cshlp.org on September 30, 2021 - Published by Cold Spring Harbor Laboratory Press Abstract The regulatory elements that direct tissue-specific gene expression in the developing mammalian embryo remain largely unknown. Although chromatin profiling has proven to be a powerful method for mapping regulatory sequences in cultured cells, chromatin states characteristic of active developmental enhancers have not been directly identified in embryonic tissues. Here we use whole transcriptome analysis coupled with genome-wide profiling of H3K27ac and H3K27me3 to map chromatin states and enhancers in mouse embryonic forelimb and hindlimb. We show that gene expression differences between forelimb and hindlimb, and between limb and other embryonic cell types, are correlated with tissue-specific H3K27ac signatures at promoters and distal sites.
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