1. Cell Biology
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Co-translational protein targeting facilitates centrosomal recruitment of PCNT during centrosome maturation in vertebrates

  1. Guadalupe Sepulveda
  2. Mark Antkowiak
  3. Ingrid Brust-Mascher
  4. Karan Mahe
  5. Tingyoung Ou
  6. Noemi M Castro
  7. Lana N Christensen
  8. Lee Cheung
  9. Xueer Jiang
  10. Daniel Yoon
  11. Bo Huang
  12. Li-En Jao  Is a corresponding author
  1. University of California, Davis, United States
  2. University of California, San Francisco, United States
Research Article
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Cite as: eLife 2018;7:e34959 doi: 10.7554/eLife.34959

Abstract

As microtubule-organizing centers of animal cells, centrosomes guide the formation of the bipolar spindle that segregates chromosomes during mitosis. At mitosis onset, centrosomes maximize microtubule-organizing activity by rapidly expanding the pericentriolar material (PCM). This process is in part driven by the large PCM protein pericentrin (PCNT), as its level increases at the PCM and helps recruit additional PCM components. However, the mechanism underlying the timely centrosomal enrichment of PCNT remains unclear. Here we show that PCNT is delivered co-translationally to centrosomes during early mitosis by cytoplasmic dynein, as evidenced by centrosomal enrichment of PCNT mRNA, its translation near centrosomes, and requirement of intact polysomes for PCNT mRNA localization. Additionally, the microtubule minus-end regulator, ASPM, is also targeted co-translationally to mitotic spindle poles. Together, these findings suggest that co-translational targeting of cytoplasmic proteins to specific subcellular destinations may be a generalized protein targeting mechanism.

Article and author information

Author details

  1. Guadalupe Sepulveda

    Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, Davis, United States
    Competing interests
    The authors declare that no competing interests exist.
  2. Mark Antkowiak

    Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, Davis, United States
    Competing interests
    The authors declare that no competing interests exist.
  3. Ingrid Brust-Mascher

    Department of Anatomy, Physiology and Cell Biology, School of Veterinary Medicine, University of California, Davis, Davis, United States
    Competing interests
    The authors declare that no competing interests exist.
  4. Karan Mahe

    Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, Davis, United States
    Competing interests
    The authors declare that no competing interests exist.
  5. Tingyoung Ou

    Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, Davis, United States
    Competing interests
    The authors declare that no competing interests exist.
  6. Noemi M Castro

    Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, Davis, United States
    Competing interests
    The authors declare that no competing interests exist.
  7. Lana N Christensen

    Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, Davis, United States
    Competing interests
    The authors declare that no competing interests exist.
  8. Lee Cheung

    Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, Davis, United States
    Competing interests
    The authors declare that no competing interests exist.
  9. Xueer Jiang

    Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, Davis, United States
    Competing interests
    The authors declare that no competing interests exist.
  10. Daniel Yoon

    Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, Davis, United States
    Competing interests
    The authors declare that no competing interests exist.
  11. Bo Huang

    Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, United States
    Competing interests
    The authors declare that no competing interests exist.
  12. Li-En Jao

    Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, Davis, United States
    For correspondence
    ljao@ucdavis.edu
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon 0000-0001-5925-883X

Funding

University of California, Davis (New Faculty Startup Funds)

  • Li-En Jao

The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.

Ethics

Animal experimentation: This study was performed in strict accordance with the recommendations in the Guide for the Care and Use of Laboratory Animals of the National Institutes of Health. All of the animals were handled according to approved institutional animal care and use committee (IACUC) protocols (#20169) of the University of California, Davis.

Reviewing Editor

  1. Yukiko M Yamashita, Reviewing Editor, University of Michigan, United States

Publication history

  1. Received: January 10, 2018
  2. Accepted: April 30, 2018
  3. Accepted Manuscript published: April 30, 2018 (version 1)

Copyright

© 2018, Sepulveda et al.

This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.

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