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. 2020 May 27;11:2652. doi: 10.1038/s41467-020-16488-y

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 5 — a Dynamic exchange of Prc1 at kinetochores. In oocytes at prometaphase I (1.5 h after NEBD), SunTag-Prc1 (24xGCN4-Prc1 coexpressed with scFv-sfGFP, green) signals at kinetochores were bleached, and the recovery was monitored (n = 5, 5, 5 kinetochores). Note that the recovery curve of SunTag-Prc1 signals indicates the turnover of Prc1 at kinetochores rather than the turnover of scFv on 24xGCN4 in this time range, which was confirmed by Ndc80-SunTag (Ndc80-24xGCN4 coexpressed with scFv-sfGFP) exhibiting similar recovery curves to Ndc80-sfGFP. See also Supplementary Movie 7. b Kif11-dependent Prc1 enrichment along kinetochore-proximal microtubules of the bipolar spindle. Control or monastrol-treated oocytes at metaphase I (4–6 h after NEBD) were stained for Prc1 (green), microtubules (magenta), and DNA (Hoechst33342, blue). The oocytes were treated with a cold buffer for 1 min before fixation to facilitate antibody penetration into the spindle. Prc1 signals along kinetochore-proximal microtubule bundles were measured, and their ratio to microtubule signals was calculated (n = 25, 25 locations from 5, 5 oocytes. Three independent experiments were performed). ****p < 0.0001 (p = 8.1E−07) by two-tailed unpaired Student’s t-test. c Prc1 overexpression rescues spindle defects in Ndc80-deleted oocytes. Ndc80^f/f Zp3-Cre oocytes overexpressing mEGFP-HURP, mEGFP-Kif11, mNeonGreen-HSET, or mNeonGreen-Prc1 were immunostained at metaphase I (5.5 h after NEBD). Spindle shapes were reconstructed in 3D and categorized (n = 29, 18, 18, 18, 24 oocytes from three independent experiments). ****p < 0.0001 (p = 5.1E−05) by two-tailed unpaired Student’s t-test. n.s., not significant. Scale bars, 10 μm. Mean +/− SD are presented in a–c.