Explorers and travelers might use a compass to determine their geographic location and navigate through unknown territories. It turns out that plants use a molecular COMPASS (COMplex of Proteins ASsociated with Set1) to navigate development during vegetative and reproductive growth via interaction with the chromatin remodeling complex INO80. In Arabidopsis thaliana, the INO80 complex plays roles in photomorphogenesis and the floral transition (Zhang et al., 2015). Although it is one of the major chromatin remodeling complexes in eukaryotes, the composition and molecular function of accessory subunits of the INO80 complex in plants remain to be determined. In this issue, Ji-Yun Shang and coworkers (Shang et al., 2021) show that a subclass of COMPASS histone H3K4 methyltransferase complexes functions as a module of INO80 and play a role in regulating its activity in Arabidopsis.

中文翻译：

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指导植物生长和花卉过渡的指南针

探险者和旅行者可能会使用指南针来确定他们的地理位置并在未知的地区导航。事实证明，植物使用分子 COMPASS（与 Set1 相关的蛋白质复合物）通过与染色质重塑复合物 INO80 的相互作用在营养和生殖生长期间导航发育。在拟南芥中，INO80 复合物在光形态发生和花转变中发挥作用（Zhang et al., 2015）。虽然它是真核生物中主要的染色质重塑复合物之一，但植物中 INO80 复合物的辅助亚基的组成和分子功能仍有待确定。在本期中，Ji-Yun Shang 及其同事 (Shang et al., 2021)表明 COMPASS 组蛋白 H3K4 甲基转移酶复合物的一个亚类作为 INO80 的一个模块，并在调节其在拟南芥中的活性中发挥作用。