KIN-3 depletion leads to increased levels of centrosomal ZYG-1

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Fig. 2. KIN-3 depletion leads to increased levels of centrosomal ZYG-1. KIN-3 depletion leads to increased levels of centrosomal ZYG-1. (A) Wild-type embryos stained for centrosome factors (ZYG-1, SAS-5, SAS-4, TBG-1: green), microtubules and DNA illustrate centrosomal localization of each factor. For SPD-2, shown are still-images from time-lapse movies of embryos expressing GFP::SPD-2 and GFP::Histone. (B) Quantification of centrosomal levels of each factor in kin-3(RNAi) (green dots) relative to controls (black dots). Each dot represents a centrosome. Box ranges from the first through third quartile of the data. Thick bar indicates the median. Solid horizontal line extends 1.5 times the inter-quartile range or to the minimum and maximum data point. ***P<0.001 (two-tailed t-test). (C) Quantitative immunoblot analyses of embryonic lysates reveal that KIN-3 knockdown leads to no significant changes in overall levels of SPD-2 (0.92±0.41-fold, n=4), SZY-20 (1.03±0.3, n=7), TBG-1 (1.06±0.35, n=10), both isoforms of SAS-5L (404aa: 1.01±0.21, n=16) and SAS-5S (288aa: 1.04±0.42, n=15) relative to controls. n indicates the number of biological replicates. Tubulin was used as a loading control. (D) Still images from time-lapse movies of embryos expressing GFP::ZYG-1-C-term. Depleting KIN-3 results in elevated levels of centrosomal GFP::ZYG-1 throughout the first cell cycle. Time (min) is given relative to first metaphase (t=0). (E) Quantification of GFP::ZYG-1-C-term levels in kin-3(RNAi) (green lines) and control embryos (black lines). Mean fluorescence intensity is plotted (n=10 centrosomes in 5 embryos). CE, Centriole; PCM, Centrosome; Cyto, Cytoplasm. Error bars are s.d. ***P<0.001, **P<0.01, *P<0.05 (two-tailed t-test). (A,D) Insets highlight centrosomes magnified 4-fold. Scale bar: 10 µm. Jeffrey C. Medley et al. Biology Open 2017;6:17-28 © 2017. Published by The Company of Biologists Ltd