RNF41 interacts with the VPS52 subunit of the GARP and EARP complexes

PLoS One. 2017 May 22;12(5):e0178132. doi: 10.1371/journal.pone.0178132. eCollection 2017.

Abstract

RNF41 (Ring Finger Protein 41) is an E3 ubiquitin ligase involved in the intracellular sorting and function of a diverse set of substrates. Next to BRUCE and Parkin, RNF41 can directly ubiquitinate ErbB3, IL-3, EPO and RARα receptors or downstream signaling molecules such as Myd88, TBK1 and USP8. In this way it can regulate receptor signaling and routing. To further elucidate the molecular mechanism behind the role of RNF41 in intracellular transport we performed an Array MAPPIT (Mammalian Protein-Protein Interaction Trap) screen using an extensive set of proteins derived from the human ORFeome collection. This paper describes the identification of VPS52, a subunit of the GARP (Golgi-Associated Retrograde Protein) and the EARP (Endosome-Associated Recycling Protein) complexes, as a novel interaction partner of RNF41. Through interaction via their coiled coil domains, RNF41 ubiquitinates and relocates VPS52 away from VPS53, a common subunit of the GARP and EARP complexes, towards RNF41 bodies.

MeSH terms

  • Endosomes / metabolism*
  • Golgi Apparatus / metabolism*
  • HeLa Cells
  • Humans
  • Membrane Proteins / genetics
  • Membrane Proteins / metabolism*
  • Multiprotein Complexes / genetics
  • Multiprotein Complexes / metabolism*
  • Ubiquitin-Protein Ligases / genetics
  • Ubiquitin-Protein Ligases / metabolism*
  • Vesicular Transport Proteins / genetics
  • Vesicular Transport Proteins / metabolism*

Substances

  • LRRC32 protein, human
  • Membrane Proteins
  • Multiprotein Complexes
  • VPS52 protein, human
  • Vesicular Transport Proteins
  • RNF41 protein, human
  • Ubiquitin-Protein Ligases

Grants and funding

D.M. holds an IWT grant from the Belgian government. This work was further supported by grants from the Belgian government (Interuniversity Attraction Poles Projects P6/28 and P6/36) and the Research Foundation-Flanders (Project G.0521.12N). J.T. is a recipient of an ERC advanced Grant (CYRE, #340941).