The cargo receptor NDP52 initiates selective autophagy by recruiting the ULK complex to cytosol-invading bacteria

Benjamin J. Ravenhill, Keith B. Boyle, Natalia von Muhlinen, Cara J. Ellison, Glenn R. Masson, Elsje G. Otten, Agnes Foeglein, Roger Williams, Felix Randow (Lead / Corresponding author)

Research output: Contribution to journalArticlepeer-review

193 Citations (Scopus)

Abstract

Xenophagy, a selective autophagy pathway that protects the cytosol against bacterial invasion, relies on cargo receptors that juxtapose bacteria and phagophore membranes. Whether phagophores are recruited from a constitutive pool or are generated de novo at prospective cargo remains unknown. Phagophore formation in situ would require recruitment of the upstream autophagy machinery to prospective cargo. Here, we show that, essential for anti-bacterial autophagy, the cargo receptor NDP52 forms a trimeric complex with FIP200 and SINTBAD/NAP1, which are subunits of the autophagy-initiating ULK and the TBK1 kinase complex, respectively. FIP200 and SINTBAD/NAP1 are each recruited independently to bacteria via NDP52, as revealed by selective point mutations in their respective binding sites, but only in their combined presence does xenophagy proceed. Such recruitment of the upstream autophagy machinery by NDP52 reveals how detection of cargo-associated “eat me” signals, induction of autophagy, and juxtaposition of cargo and phagophores are integrated in higher eukaryotes.

Original languageEnglish
Pages (from-to)320-329.e6
Number of pages17
JournalMolecular Cell
Volume74
Issue number2
DOIs
Publication statusPublished - 18 Apr 2019

Keywords

  • cargo receptor
  • FIP200
  • galectin-8
  • NDP52
  • Salmonella enterica
  • selective autophagy
  • TBK1
  • ULK
  • xenophagy

ASJC Scopus subject areas

  • Molecular Biology
  • Cell Biology

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