What is it about?
Histones are proteins that package DNA inside cells. macroH2A is an unusual histone variant because it is much larger than most histones and contains a long non-histone region. We used genome editing in the cricket Gryllus bimaculatus to tag, delete, and truncate the endogenous macroH2A gene. This allowed us to see where macroH2A is expressed during development and to test what happens when the protein, or its non-histone region, is missing.
Featured Image
Photo by Lidia Stawinska on Unsplash
Why is it important?
macroH2A has mostly been studied in vertebrates, while its roles in invertebrates remain largely unexplored because it is absent from major invertebrate models such as Drosophila and C. elegans. Our study shows that several features of macroH2A are deeply conserved, including its association with differentiating and differentiated cells and its genome-protective function. It also reveals that the non-histone region is essential for macroH2A accumulation in specific cell types. More broadly, this work strengthens Gryllus bimaculatus as a powerful model organism for chromatin biology.
Perspectives
This study is especially meaningful to me because it represents a central part of my PhD thesis. Working with Gryllus bimaculatus allowed us to ask questions that cannot be addressed in classical invertebrate models, and I hope this study will encourage further use of this emerging and highly complementary model organism.
Emmanuel Gonzalez-Sqalli
Laboratory of Biology and Modeling of the Cell
Read the Original
This page is a summary of: Revealing ancient macroH2A features through in vivo analysis in the cricket
Gryllus bimaculatus, Proceedings of the National Academy of Sciences, July 2026, Proceedings of the National Academy of Sciences,
DOI: 10.1073/pnas.2602208123.
You can read the full text:
Contributors
The following have contributed to this page
