Functions of the plant NuA4-C in shaping developmental gene expression patterns

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ID: 323604
2026
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Abstract
Abstract Chromatin remodeling plays a central role in regulating plant development and physiology by shaping the gene expression patterns that drive biological processes. Among epigenetic modifications, histone acetylation is particularly relevant as it alters chromatin structure and influences transcriptional activity. MYST-type histone acetyltransferases (HAT) are evolutionarily conserved components of the Nucleosome Acetyltransferase of histone H4 (NuA4) complex, a key regulator that acetylates histones H4, H2A, and the histone variant H2A.Z. Growing evidence supports the presence of a canonical NuA4-C in plants, similar to that described in yeast. In this review, we summarize recent studies that have begun to uncover its broad role in plant biology, highlighting its involvement in diverse processes such as the skoto- to photomorphogenesis switch, chloroplast development, shade avoidance responses, thermomorphogenesis, the vegetative-to-reproductive transition, plant growth, reproduction and hormonal signalling. In addition, we discuss recent advances in understanding the crosstalk of NuA4-C-mediated H4ac and H2A.Z deposition with other chromatin remodeling complexes in plants. Although significant progress has been made, a full understanding of the complex functions remains unavailable. Current evidence indicates that NuA4-C in yeast and TIP60 in humans are central regulators of transcription, acting not only through histone acetylation but also by influencing transcription elongation and RNA splicing, although direct evidence for similar functions in plant NuA4-C still remains limited. This regulatory role might be critical for integrating developmental programs with environmental signalling pathways. While initial insights into the recruitment of NuA4-C to target genes have emerged, further research is needed to clarify how its activity is controlled and modulated in different biological contexts.
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Authors Maria Guillem-Bernal, Javier Barrero‐Gil, José A. Jarillo, Manuel Piñeiro
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Journal Journal of experimental botany
Year 2026
DOI
10.1093/jxb/erag390
URL
https://doi.org/10.1093/jxb/erag390
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