In this episode of the Epigenetics Podcast, we caught up with Emily Bernstein from Icahn Schoon of Medicine at Mount Sinai to talk about her work on MacroH2A function and the role of Polycomb proteins in its epigenetic regulation, and how this affects in stem cell development and disease.
The Bernstein Lab focuses on histone variants, in particular the H2A variant macroH2A. Chromatin architecture is influenced by the composition of the nucleosome and, hence, exchanging the core histones for histone variants can have a major impact on chromatin structure. MacroH2A variantsare the most unique histone variants due to a 30kDa non-histone domain (macro domain) at their C-termini. This macro domain likely confers important functions to macroH2A variants, which have important regulatory roles in the cell. Among other things, the Bernstein Lab has shown that macroH2A is enriched at a critical set of Utx target genes whose expression is critical for the early stages of induced pluripotency, and that macroH2A plays a role as a barrier to tumorigenesis.
References
Kapoor, A., Goldberg, M. S., Cumberland, L. K., Ratnakumar, K., Segura, M. F., Emanuel, P. O., Menendez, S., Vardabasso, C., LeRoy, G., Vidal, C. I., Polsky, D., Osman, I., Garcia, B. A., Hernando, E., & Bernstein, E. (2010). The histone variant macroH2A suppresses melanoma progression through regulation of CDK8. Nature, 468(7327), 1105–1109. https://doi.org/10.1038/nature09590
Vardabasso, C., Gaspar-Maia, A., Hasson, D., Pünzeler, S., Valle-Garcia, D., Straub, T., Keilhauer, E. C., Strub, T., Dong, J., Panda, T., Chung, C.-Y., Yao, J. L., Singh, R., Segura, M. F., Fontanals-Cirera, B., Verma, A., Mann, M., Hernando, E., Hake, S. B., & Bernstein, E. (2015). Histone Variant H2A.Z.2 Mediates Proliferation and Drug Sensitivity of Malignant Melanoma. Molecular Cell, 59(1), 75–88. https://doi.org/10.1016/j.molcel.2015.05.009
Sun, Zhen, Dan Filipescu, Joshua Andrade, Alexandre Gaspar-Maia, Beatrix Ueberheide, and Emily Bernstein. 2018. “Transcription-Associated Histone Pruning Demarcates MacroH2A Chromatin Domains.” Nature Structural & Molecular Biology 25(10):958–70. doi: 10.1038/s41594-018-0134-5.
Related Episodes
Influence of Histone Variants on Chromatin Structure and Metabolism (Marcus Buschbeck)
Regulation of Chromatin Organization by Histone Chaperones (Geneviève Almouzni)
Variants of Core Histones: Modulators of Chromatin Structure and Function (Sandra Hake)
Contact
Active Motif on Twitter
Epigenetics Podcast on Twitter
Active Motif on LinkedIn
Active Motif on Facebook
Email: podcast@activemotif.com
Comparing CUT&Tag to ENCODE ChIP-Seq in Alzheimer's Disease Samples (Sarah Marzi)
The Role of Hat1p in Chromatin Assembly (Mark Parthun)
The Impact of Paternal Diet on Offspring Metabolism (Upasna Sharma)
H3K36me3, H4K16ac and Cryptic Transcription in Ageing (Weiwei Dang)
Split-Pool Recognition of Interactions by Tag Extension (SPRITE) (Mitch Guttman)
MLL Proteins in Mixed-Lineage Leukemia (Yali Dou)
Sex-biased Imprinting and DNA Regulatory Landscapes During Reprogramming (Sam Buckberry)
BET Proteins and Their Role in Chromosome Folding and Compartmentalization (Kyle Eagen)
Epigenetic Underpinnings of Human Addiction (Francesca Telese & Jessica Zhou)
H3K79 Methylation, DOT1L, and FOXG1 in Neural Development (Tanja Vogel)
Function of Insulators in 3D Genome Folding (Maria Gambetta)
Contribution of the Estrogen Receptor to Breast Cancer Progression (Jason Carroll)
Inheritance of Transcriptional Memory by Mitotic Bookmarking (Sheila Teves)
Differential Methylated Regions in Autism Spectrum Disorders (Janine La Salle)
DNA Damage in Longevity and Ageing (Björn Schumacher)
The Impact of Chromatin Modifiers on Disease Development and Progression (Capucine van Rechem)
Long-Range Transcriptional Control by 3D Chromosome Structure (Luca Giorgetti)
Transgenerational Inheritance and Epigenetic Imprinting in Plants (Mary Gehring)
When is a Peak a Peak? (Claudio Cantù)
Analysis of 3D Chromatin Structure Using Super-Resolution Imaging (Alistair Boettiger)
Create your
podcast in
minutes
It is Free
DNA Today: A Genetics Podcast
Museum of the Missing
Strange by Nature Podcast
Sasquatch Chronicles
Hidden Brain