FBN-1, a fibrillin-related protein, is required for resistance of the epidermis to mechanical deformation during C. elegans embryogenesis

  1. Melissa Kelley
  2. John Yochem
  3. Michael Krieg
  4. Andrea Calixto
  5. Maxwell G Heiman
  6. Aleksandra Kuzmanov
  7. Vijaykumar Meli
  8. Martin Chalfie
  9. Miriam B Goodman
  10. Shai Shaham
  11. Alison Frand
  12. David S Fay  Is a corresponding author
  1. University of Wyoming, United States
  2. Stanford University, United States
  3. Columbia University, United States
  4. Boston Children's Hospital, United States
  5. University of California, United States
  6. Standford University, United States
  7. The Rockefeller University, United States

Abstract

During development, biomechanical forces contour the body and provide shape to internal organs. Using genetic and molecular approaches in combination with a FRET-based tension sensor, we characterized a pulling force exerted by the elongating pharynx (foregut) on the anterior epidermis during C. elegans embryogenesis. Resistance of the epidermis to this force and to actomyosin-based circumferential constricting forces is mediated by FBN-1, a ZP domain protein related to vertebrate fibrillins. fbn-1 was required specifically within the epidermis and FBN-1 was expressed in epidermal cells and secreted to the apical surface as a putative component of the embryonic sheath. Tiling array studies indicated that fbn-1 mRNA processing requires the conserved alternative splicing factor MEC-8/RBPMS. The conserved SYM-3/FAM102A and SYM-4/WDR44 proteins, which are linked to protein trafficking, function as additional components of this network. Our studies demonstrate the importance of the apical extracellular matrix in preventing mechanical deformation of the epidermis during development.

Article and author information

Author details

  1. Melissa Kelley

    Department of Molecular Biology, University of Wyoming, Laramie, United States
    Competing interests
    The authors declare that no competing interests exist.
  2. John Yochem

    Department of Molecular Biology, University of Wyoming, Laramie, United States
    Competing interests
    The authors declare that no competing interests exist.
  3. Michael Krieg

    Department of Molecular and Cellular Physiology, Stanford University, Stanford, United States
    Competing interests
    The authors declare that no competing interests exist.
  4. Andrea Calixto

    Department of Biological Sciences, Columbia University, New York, United States
    Competing interests
    The authors declare that no competing interests exist.
  5. Maxwell G Heiman

    Department of Genetics, Harvard Medical School, Boston Children's Hospital, Boston, United States
    Competing interests
    The authors declare that no competing interests exist.
  6. Aleksandra Kuzmanov

    Department of Molecular Biology, University of Wyoming, Laramie, United States
    Competing interests
    The authors declare that no competing interests exist.
  7. Vijaykumar Meli

    Department of Biological Chemistry, David Geffen School of Medicine, University of California, Los Angeles, United States
    Competing interests
    The authors declare that no competing interests exist.
  8. Martin Chalfie

    Department of Biological Sciences, Columbia University, New York, United States
    Competing interests
    The authors declare that no competing interests exist.
  9. Miriam B Goodman

    Department of Molecular and Cellular Physiology, Standford University, Stanford, United States
    Competing interests
    The authors declare that no competing interests exist.
  10. Shai Shaham

    Laboratory of Developmental Genetics, The Rockefeller University, New York, United States
    Competing interests
    The authors declare that no competing interests exist.
  11. Alison Frand

    Department of Biological Chemistry, David Geffen School of Medicine, University of California, Los Angeles, United States
    Competing interests
    The authors declare that no competing interests exist.
  12. David S Fay

    Department of Molecular Biology, University of Wyoming, Laramie, United States
    For correspondence
    davidfay@uwyo.edu
    Competing interests
    The authors declare that no competing interests exist.

Reviewing Editor

  1. Julie Ahringer, University of Cambridge, United Kingdom

Version history

  1. Received: January 19, 2015
  2. Accepted: March 20, 2015
  3. Accepted Manuscript published: March 23, 2015 (version 1)
  4. Version of Record published: April 14, 2015 (version 2)

Copyright

© 2015, Kelley 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.

Metrics

  • 2,986
    views
  • 621
    downloads
  • 49
    citations

Views, downloads and citations are aggregated across all versions of this paper published by eLife.

Download links

A two-part list of links to download the article, or parts of the article, in various formats.

Downloads (link to download the article as PDF)

Open citations (links to open the citations from this article in various online reference manager services)

Cite this article (links to download the citations from this article in formats compatible with various reference manager tools)

  1. Melissa Kelley
  2. John Yochem
  3. Michael Krieg
  4. Andrea Calixto
  5. Maxwell G Heiman
  6. Aleksandra Kuzmanov
  7. Vijaykumar Meli
  8. Martin Chalfie
  9. Miriam B Goodman
  10. Shai Shaham
  11. Alison Frand
  12. David S Fay
(2015)
FBN-1, a fibrillin-related protein, is required for resistance of the epidermis to mechanical deformation during C. elegans embryogenesis
eLife 4:e06565.
https://doi.org/10.7554/eLife.06565

Share this article

https://doi.org/10.7554/eLife.06565

Further reading

    1. Cancer Biology
    2. Cell Biology
    Dongyue Jiao, Huiru Sun ... Kun Gao
    Research Article

    Enhanced protein synthesis is a crucial molecular mechanism that allows cancer cells to survive, proliferate, metastasize, and develop resistance to anti-cancer treatments, and often arises as a consequence of increased signaling flux channeled to mRNA-bearing eukaryotic initiation factor 4F (eIF4F). However, the post-translational regulation of eIF4A1, an ATP-dependent RNA helicase and subunit of the eIF4F complex, is still poorly understood. Here, we demonstrate that IBTK, a substrate-binding adaptor of the Cullin 3-RING ubiquitin ligase (CRL3) complex, interacts with eIF4A1. The non-degradative ubiquitination of eIF4A1 catalyzed by the CRL3IBTK complex promotes cap-dependent translational initiation, nascent protein synthesis, oncogene expression, and cervical tumor cell growth both in vivo and in vitro. Moreover, we show that mTORC1 and S6K1, two key regulators of protein synthesis, directly phosphorylate IBTK to augment eIF4A1 ubiquitination and sustained oncogenic translation. This link between the CRL3IBTK complex and the mTORC1/S6K1 signaling pathway, which is frequently dysregulated in cancer, represents a promising target for anti-cancer therapies.

    1. Biochemistry and Chemical Biology
    2. Cell Biology
    Natalia Dolgova, Eva-Maria E Uhlemann ... Oleg Y Dmitriev
    Research Article Updated

    Mediator of ERBB2-driven cell motility 1 (MEMO1) is an evolutionary conserved protein implicated in many biological processes; however, its primary molecular function remains unknown. Importantly, MEMO1 is overexpressed in many types of cancer and was shown to modulate breast cancer metastasis through altered cell motility. To better understand the function of MEMO1 in cancer cells, we analyzed genetic interactions of MEMO1 using gene essentiality data from 1028 cancer cell lines and found multiple iron-related genes exhibiting genetic relationships with MEMO1. We experimentally confirmed several interactions between MEMO1 and iron-related proteins in living cells, most notably, transferrin receptor 2 (TFR2), mitoferrin-2 (SLC25A28), and the global iron response regulator IRP1 (ACO1). These interactions indicate that cells with high-MEMO1 expression levels are hypersensitive to the disruptions in iron distribution. Our data also indicate that MEMO1 is involved in ferroptosis and is linked to iron supply to mitochondria. We have found that purified MEMO1 binds iron with high affinity under redox conditions mimicking intracellular environment and solved MEMO1 structures in complex with iron and copper. Our work reveals that the iron coordination mode in MEMO1 is very similar to that of iron-containing extradiol dioxygenases, which also display a similar structural fold. We conclude that MEMO1 is an iron-binding protein that modulates iron homeostasis in cancer cells.