PreprintCited by 51Cellular transport and secretionAutophagy in Disease and TherapyExtracellular vesicles in disease

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Structural Organization of the Retriever-CCC Endosomal Recycling Complex

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Preprint — published as 10.1038/s41594-023-01184-4 · Paper page

Abstract

The recycling of membrane proteins from endosomes to the cell surface is vital for cell signaling and survival. Retriever, a trimeric complex of VPS35L, VPS26C and VPS29, together with the CCC complex comprising CCDC22, CCDC93, and COMMD proteins, plays a crucial role in this process. The precise mechanisms underlying Retriever assembly and its interaction with CCC have remained elusive. Here, we present the first high-resolution structure of Retriever determined using cryogenic electron microscopy. The structure reveals a unique assembly mechanism, distinguishing it from its remotely related paralog, Retromer. By combining AlphaFold predictions and biochemical, cellular, and proteomic analyses, we further elucidate the structural organization of the entire Retriever-CCC complex and uncover how cancer-associated mutations disrupt complex formation and impair membrane protein homeostasis. These findings provide a fundamental framework for understanding the biological and pathological implications associated with Retriever-CCC-mediated endosomal recycling.

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Metadata

Authors
Boesch, D. J., Singla, A., Han, Y., Kramer, D. A., Liu, Q., Suzuki, K., Juneja, P., Zhao, X., Long, X., Medlyn, M. J., Billadeau, D. D., Chen, Z., Chen, B., & Burstein, E.
Affiliations
  • Iowa State University (US)
  • The University of Texas Southwestern Medical Center (US)
  • Mayo Clinic (US)
Corresponding author
  • Chen, Zhe
  • Chen, Baoyu
  • Burstein, Ezra
Venue
Nature Structural & Molecular Biology
Publisher
openRxiv
Published
2023-06-07
Volume
31
Issue
6
Pages
910-924
ISSN
1545-9985 (ISSN-L)
OpenAlex
W4389440027
Cited by
51
References
1
Citations by year
2026: 8 · 2025: 26 · 2024: 16 · 2023: 1
FWCI
7.64
Type
journal article
Language
en
Open access
Licence
cc-by-nc-nd
Locations
  • Nature Structural & Molecular Biology (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
  • Research Square (acceptedVersion, cc-by)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • PubMed Central (submittedVersion, cc-by-nc-nd)
  • PubMed Central (submittedVersion, cc-by)
  • Iowa State University Digital Repository (Iowa State University) (submittedVersion)
Funders
  • National Science Foundation (CAREER, 2047640)
  • Roy J. Carver Charitable Trust
  • Cancer Prevention and Research Institute of Texas (RP220582)
  • University of Texas Southwestern Medical Center
  • Iowa State University
  • National Institutes of Health
  • National Institute of General Medical Sciences (R35GM128786)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK107733, P30DK127984)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Autophagy in Disease and Therapy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Extracellular vesicles in disease
Keywords
endosomal recycling, membrane protein recycling, VPS29, protein complex structure, retromer, cancer-associated mutations

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