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Analysis of the licensing mechanism of centriole duplication by using Separase Sensor

Research Project

Project/Area Number 15K14508
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Cell biology
Research InstitutionNagoya University

Principal Investigator

Hanafusa Hiroshi  名古屋大学, 理学研究科, 准教授 (00345844)

Project Period (FY) 2015-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
KeywordsLRRK1 / 中心小体 / ライセンシングシグナル / 中心体 / 母娘中心小体 / セパレース / セパレースセンサー
Outline of Final Research Achievements

The centrosome consists of a pair of mother-daughter centrioles, which are replicated only once per cell cycle. At this time, the disengagement of mother-daughter centrioles acts as a licensing signal for centriole duplication. Dissociation of the mother-daughter centrioles occurs by the cleavage of cohesin by the protease separator. When a separator sensor with a chromophore on both sides of the cohesin cleavage sequence is used, the activity of the separase can be observed with a change in fluorescence. In this study, we used this system to identify genes important for licensing signals and analyze their molecular mechanisms. As a result, it was revealed that the ROCO family kinase LRRK1 controls the disengagement of the mother-daughter centrioles in a kinase activity-dependent manner.

Report

(4 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (3 results)

All 2015

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results,  Acknowledgement Compliant: 3 results)

  • [Journal Article] LRRK1 regulates spindle orientation by phosphorylating CDK5RAP2.2015

    • Author(s)
      Hanafusa H, Matsumoto, K
    • Journal Title

      Cell Cycle

      Volume: 14 Issue: 21 Pages: 3349-3350

    • DOI

      10.1080/15384101.2015.1093446

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] PLK1-dependent activation of LRRK1 regulates spindle orientation by phosphorylating CDK5RAP2.2015

    • Author(s)
      Hanafusa H, Kedashiro S, Tezuka M, Funatsu M, Usami S, Toyoshima F, Matsumoto K
    • Journal Title

      Nat. Cell Biol.

      Volume: 17 Issue: 8 Pages: 1024-1035

    • DOI

      10.1038/ncb3204

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Phosphorylation of CLIP-170 by LRRK1 regulates EGFR trafficking by promoting recruitment of p150Glued to MT plus-ends.2015

    • Author(s)
      Kedashiro S, Pastuhov S, Nihioka T, Watanabe T, Kaibuchi K, Matsumoto, K, Hanafusa H
    • Journal Title

      J. Cell Sci.

      Volume: 128 Issue: 4 Pages: 385-396

    • DOI

      10.1242/jcs.169102

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant

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Published: 2015-04-16   Modified: 2019-03-29  

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