Abstract
In June 2019, more than a hundred plant researchers met in Cologne, Germany, for the 6th European Workshop on Plant Chromatin (EWPC). This conference brought together a highly dynamic community of researchers with the common aim to understand how chromatin organization controls gene expression, development, and plant responses to the environment. New evidence showing how epigenetic states are set, perpetuated, and inherited were presented, and novel data related to the three-dimensional organization of chromatin within the nucleus were discussed. At the level of the nucleosome, its composition by different histone variants and their specialized histone deposition complexes were addressed as well as the mechanisms involved in histone post-translational modifications and their role in gene expression. The keynote lecture on plant DNA methylation by Julie Law (SALK Institute) and the tribute session to Lars Hennig, honoring the memory of one of the founders of the EWPC who contributed to promote the plant chromatin and epigenetic field in Europe, added a very special note to this gathering. In this perspective article we summarize some of the most outstanding data and advances on plant chromatin research presented at this workshop.
Highlights
Last year, the Max Planck Institute for Plant Breeding Research in Cologne hosted the 6th European Workshop on Plant Chromatin (EWPC)
Clara Bourbosse (Paris, France) reported recent results that showed that SET DOMAIN GROUP 2 (SDG2)/ARABIDOPSIS TRITHORAX 3 (ATX3), which has a main role in the deposition of H3K4me3 in Arabidopsis (Berr et al, 2010; Guo et al, 2010), binds to SWD2-like b (S2Lb), which interacts with core subunits of AtCOMPASS in a high-molecular weight complex
While histone modifications have so far rarely been considered in a variant-specific manner, combinations of histone variants with their particular marks constitute an additional layer of complexity to fine-tune chromatin regulation that is just emerging and that will most certainly require further studies
Summary
Hua Jiang (Gatersleben, Germany) discussed the role of AThook proteins in the regulation of gene expression by mediating the H3K9me2 heterochromatic mark at the nuclear matrix-associated regions (MARs). Clara Bourbosse (Paris, France) reported recent results that showed that SET DOMAIN GROUP 2 (SDG2)/ARABIDOPSIS TRITHORAX 3 (ATX3), which has a main role in the deposition of H3K4me3 in Arabidopsis (Berr et al, 2010; Guo et al, 2010), binds to SWD2-like b (S2Lb), which interacts with core subunits of AtCOMPASS in a high-molecular weight complex.
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