Hartono, Masaharu Hazawa, Kee Siang Lim, Firli R. P. Dewi, Akiko Kobayashi, Richard W. Wong
Background: Nuclear pore complexes (NPCs) act as nano-turnstiles within nuclear membranes between the cytoplasm and nucleus of mammalian cells. NPC proteins, called nucleoporins (Nups), mediate trafficking of proteins and RNA into and out of the nucleus, and are involved in a variety of mitotic processes. We previously reported that Nup62 localizes to the centrosome and mitotic spindle during mitosis, and plays a role in centrosome homeostasis. However, whether Nup58, a Nup62 subcomplex protein, also localizes to spindle poles is unknown. Result: Herein, we show that Nup58 localizes to the nuclear rim during interphase, and to mitotic spindles, centrosomes, and midbodies during mitosis. Our confocal microscopy, live-cell imaging, and stimulated emission depletion nanoscopy results also demonstrated that Nup58 localized to the centrosomes during metaphase and relocalized to midbodies during abscission. Depletion of Nup58 resulted in centrosomal abnormalities and delayed abscission. Conclusion: Nup58 localized at the centrosomes and mitotic spindle during metaphase and relocalized at midbodies during abscission. This study highlights the important role of Nup58 in mitosis. © 2019 The Author(s).
School of Natural System, Institute of Natural Science and Technology, Kanazawa University, Kanazawa, Japan; Biology Department, Faculty of Mathematics and Natural Science, Universitas Negeri Makassar, Jl. Dg Tata Raya, Makassar, 90224, Indonesia; Cell-Bionomics Research Unit, INFINITI, Kanazawa University, Kanazawa, Japan; WPI-Nano Life Science Institute, Kanazawa University, Kakuma-machi, Kanazawa, Japan; Biology Department, Faculty of Science and Technology, University of Airlangga, Jl. Airlangga No. 2-4, Gubeng, Surabaya, East Java, 60115, Indonesia
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