DEK influences the trade-off between growth and arrest via H2A.Z-nucleosomes in Arabidopsis
Brestovitsky, A.; Ezer, D.; Waidmann, S.; Maslen, S. L.; Balcerowicz, M.; Cortijo, S.; Charoensawan, V.; Martinho, C.; Rhodes, D.; Jonak, C.; Wigge, P. A.
Show abstract
The decision of whether to grow and proliferate or to restrict growth and develop resilience to stress is a key biological trade-off. In plants, constitutive growth results in increased sensitivity to environmental stress1,2. The underlying mechanisms controlling this decision are however not well understood. We used temperature as a cue to discover regulators of this process in plants, as it both enhances growth and development rates within a specific range and is also a stress at extremes. We found that the conserved chromatin-associated protein DEK plays a central role in balancing the response between growth and arrest in Arabidopsis, and it does this via H2A.Z-nucleosomes. DEK target genes show two distinct categories of chromatin architecture based on the distribution of H2A.Z in +1 nucleosome and gene body, and these predict induction or repression by DEK. We show that these chromatin signatures of DEK target genes are conserved in human cells, suggesting that DEK may act through an evolutionarily conserved mechanism to control the balance between growth and arrest in plants and animals.
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