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Requirement for a Drosophila E3-ubiquitin ligase in phagocytosis of apoptotic cells

Academic Article
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Overview

authors

  • Silva, E.
  • Au-Yeung, H. W.
  • Van Goethem, E.
  • Burden, J.
  • Franc, Nathalie

publication date

  • October 2007

journal

  • Immunity  Journal

abstract

  • Many cells die by apoptosis during animal development. Apoptotic cells are rapidly removed through phagocytosis by their neighbors or by macrophages. To genetically dissect this process, we performed an in vivo screen for genes required for efficient phagocytosis of apoptotic cells by Drosophila macrophages and identified pallbearer (pall), which encodes an F box protein. F box proteins generally provide substrate specificity to Skp Cullin F box (SCF) complexes, acting as E3 ligases that target phosphorylated proteins to ubiquitylation and degradation via the 26S proteasome. We showed that Pallbearer functions in an SCF-dependent manner and provided direct evidence of a role for ubiquitylation and proteasomal degradation in phagocytosis of apoptotic corpses in vivo. This work might further our understanding of the regulation of apoptotic cell engulfment and thus our understanding of innate immunity as a whole.

subject areas

  • Animals
  • Apoptosis
  • Drosophila
  • Drosophila Proteins
  • Gene Expression
  • Immunohistochemistry
  • Immunoprecipitation
  • In Situ Hybridization
  • Macrophages
  • Microscopy, Confocal
  • Microscopy, Electron, Transmission
  • Phagocytosis
  • Proteasome Endopeptidase Complex
  • Reverse Transcriptase Polymerase Chain Reaction
  • SKP Cullin F-Box Protein Ligases
  • Transfection
  • Ubiquitin-Protein Ligases
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Identity

International Standard Serial Number (ISSN)

  • 1074-7613

Digital Object Identifier (DOI)

  • 10.1016/j.immuni.2007.08.016

PubMed ID

  • 17936033
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Additional Document Info

start page

  • 585

end page

  • 596

volume

  • 27

issue

  • 4

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