Chromatin landscape is associated with sex-biased expression and Drosophila-like dosage compensation of the Z chromosome in Artemia franciscana

Bett VK, Trejo Arellano MS, Vicoso B. 2025. Chromatin landscape is associated with sex-biased expression and Drosophila-like dosage compensation of the Z chromosome in Artemia franciscana. Molecular Biology and Evolution. 42(5), msaf085.

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Journal Article | Published | English

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Corresponding author has ISTA affiliation

Abstract
The males and females of the brine shrimp Artemia franciscana are highly dimorphic, and this dimorphism is associated with substantial sex-biased gene expression in heads and gonads. How these sex-specific patterns of expression are regulated at the molecular level is unknown. A. franciscana also has differentiated ZW sex chromosomes, with complete dosage compensation, but the molecular mechanism through which compensation is achieved is unknown. Here, we conducted CUT&TAG assays targeting 7 post-translational histone modifications (H3K27me3, H3K9me2, H3K9me3, H3K36me3, H3K27ac, H3K4me3, and H4K16ac) in heads and gonads of A. franciscana, allowing us to divide the genome into 12 chromatin states. We further defined functional chromatin signatures for all genes, which were correlated with transcript level abundances. Differences in the occupancy of the profiled epigenetic marks between sexes were associated with differential gene expression between males and females. Finally, we found a significant enrichment of the permissive H4K16ac histone mark in the Z-specific region in both tissues of females but not males, supporting the role of this histone mark in mediating dosage compensation of the Z chromosome.
Publishing Year
Date Published
2025-05-01
Journal Title
Molecular Biology and Evolution
Publisher
Oxford University Press
Acknowledgement
We thank the Vicoso lab for their help in maintaining Artemia and for their valuable feedback and suggestions. We thank Marwan Elkrewi for his useful technical advice and discussions. We are also grateful to the Scientific Unit at ISTA Austria for computational resources and assistance. This work was supported by Austrian science fund (FWF) grants PAT8748323 and SFB F88-10 (as part of the SFB Meiosis consortium https://sfbmeiosis.org) to BV and Swedish Research Council (Vetenskapsrådet, grant number 2020-06424) to MSTA.
Acknowledged SSUs
Volume
42
Issue
5
Article Number
msaf085
ISSN
eISSN
IST-REx-ID

Cite this

Bett VK, Trejo Arellano MS, Vicoso B. Chromatin landscape is associated with sex-biased expression and Drosophila-like dosage compensation of the Z chromosome in Artemia franciscana. Molecular Biology and Evolution. 2025;42(5). doi:10.1093/molbev/msaf085
Bett, V. K., Trejo Arellano, M. S., & Vicoso, B. (2025). Chromatin landscape is associated with sex-biased expression and Drosophila-like dosage compensation of the Z chromosome in Artemia franciscana. Molecular Biology and Evolution. Oxford University Press. https://doi.org/10.1093/molbev/msaf085
Bett, Vincent K, Minerva S Trejo Arellano, and Beatriz Vicoso. “Chromatin Landscape Is Associated with Sex-Biased Expression and Drosophila-like Dosage Compensation of the Z Chromosome in Artemia Franciscana.” Molecular Biology and Evolution. Oxford University Press, 2025. https://doi.org/10.1093/molbev/msaf085.
V. K. Bett, M. S. Trejo Arellano, and B. Vicoso, “Chromatin landscape is associated with sex-biased expression and Drosophila-like dosage compensation of the Z chromosome in Artemia franciscana,” Molecular Biology and Evolution, vol. 42, no. 5. Oxford University Press, 2025.
Bett VK, Trejo Arellano MS, Vicoso B. 2025. Chromatin landscape is associated with sex-biased expression and Drosophila-like dosage compensation of the Z chromosome in Artemia franciscana. Molecular Biology and Evolution. 42(5), msaf085.
Bett, Vincent K., et al. “Chromatin Landscape Is Associated with Sex-Biased Expression and Drosophila-like Dosage Compensation of the Z Chromosome in Artemia Franciscana.” Molecular Biology and Evolution, vol. 42, no. 5, msaf085, Oxford University Press, 2025, doi:10.1093/molbev/msaf085.
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2025-05-28
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PMID: 40202086
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