Plasmodesmata (PD) are crucial structures for intercellular communication in multicellular plants with remorins being their crucial plant-specific structural and functional constituents. The PD biogenesis is an intriguing but poorly understood process. By expressing an Arabidopsis remorin protein in mammalian cells, we have reconstituted a PD-like filamentous structure, termed remorin filament (RF), connecting neighboring cells physically and physiologically. Notably, RFs are capable of transporting macromolecules intercellularly, in a way similar to plant PD. With further super-resolution microscopic analysis and biochemical characterization, we found that RFs are also composed of actin filaments, forming the core skeleton structure, aligned with the remorin protein. This unique heterologous filamentous structure might explain the molecular mechanism for remorin function as well as PD construction. Furthermore, remorin protein exhibits a specific distribution manner in the plasma membrane in mammalian cells, representing a lipid nanodomain, depending on its lipid modification status. Our studies not only provide crucial insights into the mechanism of PD biogenesis, but also uncovers unsuspected fundamental mechanistic and evolutionary links between intercellular communication systems of plants and animals.
Wei Z, Tan S, Liu T, et al. Plasmodesmata-like intercellular connections by plant remorin in animal cells. bioRxiv. 2020. doi:10.1101/791137
Wei, Z., Tan, S., Liu, T., Wu, Y., Lei, J.-G., Chen, Z., … Liao, K. (2020). Plasmodesmata-like intercellular connections by plant remorin in animal cells. bioRxiv. Cold Spring Harbor Laboratory. https://doi.org/10.1101/791137
Wei, Zhuang, Shutang Tan, Tao Liu, Yuan Wu, Ji-Gang Lei, ZhengJun Chen, Jiří Friml, Hong-Wei Xue, and Kan Liao. “Plasmodesmata-like Intercellular Connections by Plant Remorin in Animal Cells.” BioRxiv. Cold Spring Harbor Laboratory, 2020. https://doi.org/10.1101/791137.
Z. Wei et al., “Plasmodesmata-like intercellular connections by plant remorin in animal cells,” bioRxiv. Cold Spring Harbor Laboratory, 2020.
Wei Z, Tan S, Liu T, Wu Y, Lei J-G, Chen Z, Friml J, Xue H-W, Liao K. 2020. Plasmodesmata-like intercellular connections by plant remorin in animal cells. bioRxiv, 10.1101/791137.
Wei, Zhuang, et al. “Plasmodesmata-like Intercellular Connections by Plant Remorin in Animal Cells.” BioRxiv, Cold Spring Harbor Laboratory, 2020, doi:10.1101/791137.