Actomyosin and CSI1/POM2 cooperate to deliver cellulose synthase from Golgi to cortical microtubules in Arabidopsis

Lu Liu, Ting Wang, Yifan Bai, Pengcheng Yan, Liufeng Dai, Pingzhou Du, Staffan Persson and Yi Zhang ()
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Lu Liu: Beijing Normal University
Ting Wang: Beijing Normal University
Yifan Bai: Beijing Normal University
Pengcheng Yan: Beijing Normal University
Liufeng Dai: Beijing Normal University
Pingzhou Du: Beijing Normal University
Staffan Persson: University of Copenhagen
Yi Zhang: Beijing Normal University

Nature Communications, 2023, vol. 14, issue 1, 1-13

Abstract: Abstract As one of the major components of plant cell walls, cellulose is crucial for plant growth and development. Cellulose is synthesized by cellulose synthase (CesA) complexes (CSCs), which are trafficked and delivered from the Golgi apparatus to the plasma membrane. How CesAs are released from Golgi remains largely unclear. In this study, we observed that STELLO (STL) family proteins localized at a group of small CesA-containing compartments called Small CesA compartments (SmaCCs) or microtubule-associated CesA compartments (MASCs). The STL-labeled SmaCCs/MASCs were directly derived from Golgi through a membrane-stretching process: membrane-patches of Golgi attached to cortical microtubules, which led to emergence of membrane-tails that finally ruptured to generate SmaCCs/MASCs associated with the cortical microtubules. While myosin propelled the movement of Golgi along actin filaments to stretch the tails, the CesA-microtubule linker protein, CSI1/POM2 was indispensable for the tight anchor of the membrane-tail ends at cortical microtubules. Together, our data reveal a non-canonical delivery route to the plasma membrane of a major enzyme complex in plant biology.

Date: 2023
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DOI: 10.1038/s41467-023-43325-9

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