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- W2888508775 endingPage "521" @default.
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- W2888508775 abstract "Abstract The mitotic spindle is a dynamic bipolar structure that mediates chromosome segregation in mitosis. In most organisms, spindle formation requires the action of kinesin‐5 motor proteins that generate outward force on antiparallel microtubules to establish spindle bipolarity. Previous work has shown that Eg5 and TPX2, a spindle microtubule‐associated protein that suppresses Eg5 motor activity, are enriched on parallel microtubules near spindle poles. This distribution is inconsistent with the requirement for Eg5‐dependent force production during mitosis. To investigate this, we used CRISPR/Cas9 gene editing to tag Eg5 and TPX2 with EGFP and quantify protein distribution throughout mitosis. The results show that at metaphase both Eg5–EGFP and TPX2–EGFP are enriched toward spindle poles, but only TPX2–EGFP is enriched relative to microtubules. Eg5–EGFP and TPX2–EGFP show distinct localization patterns in anaphase, with Eg5–EGFP relocalizing to the midzone earlier than TPX2–EGFP. Analysis of spindles oriented at 90° to the coverslip confirmed that Eg5–EGFP was present on bridge microtubules in metaphase and anaphase; in contrast, TPX2 was not enriched, or enriched at later times, on these microtubules. Overall, TPX2 was present at 3.6 X the level of Eg5 on the spindle and Eg5 was locally enriched at the prophase centrosome (~7×) compared to the whole cell. Our results show that using cells with fluorescent tags at the endogenous locus can provide novel insight into protein distribution during mitosis." @default.
- W2888508775 created "2018-08-31" @default.
- W2888508775 creator A5031444461 @default.
- W2888508775 creator A5033036301 @default.
- W2888508775 date "2018-11-15" @default.
- W2888508775 modified "2023-09-26" @default.
- W2888508775 title "Distribution of Eg5 and TPX2 in mitosis: Insight from CRISPR tagged cells" @default.
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- W2888508775 doi "https://doi.org/10.1002/cm.21486" @default.
- W2888508775 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30123975" @default.
- W2888508775 hasPublicationYear "2018" @default.
- W2888508775 type Work @default.