Cited by 36Cellular transport and secretionFungal and yeast genetics researchAutophagy in Disease and Therapy

Global Analysis of Yeast Endosomal Transport Identifies the Vps55/68 Sorting Complex

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Schluter, Cayetana, Lam, Karen K.Y., Brumm, Jochen, Wu, Bella W., Saunders, Matthew, Stevens, Tom H., Bryan, Jennifer, Conibear, Elizabeth·2008·Molecular Biology of the Cell

Abstract

Endosomal transport is critical for cellular processes ranging from receptor down-regulation and retroviral budding to the immune response. A full understanding of endosome sorting requires a comprehensive picture of the multiprotein complexes that orchestrate vesicle formation and fusion. Here, we use unsupervised, large-scale phenotypic analysis and a novel computational approach for the global identification of endosomal transport factors. This technique effectively identifies components of known and novel protein assemblies. We report the characterization of a previously undescribed endosome sorting complex that contains two well-conserved proteins with four predicted membrane-spanning domains. Vps55p and Vps68p form a complex that acts with or downstream of ESCRT function to regulate endosomal trafficking. Loss of Vps68p disrupts recycling to the TGN as well as onward trafficking to the vacuole without preventing the formation of lumenal vesicles within the MVB. Our results suggest the Vps55/68 complex mediates a novel, conserved step in the endosomal maturation process.

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  • The predicted structure of the interaction between Vps55 and Vps68 provides clues about the mechanism of their function.

    “Vps55 and Vps68 are conserved membrane proteins that are important for endosomal cargo sorting; our predicted structure (Fig. 2) of their interaction provides clues about the mechanism of their function (74).”

    From Computed structures of core eukaryotic protein complexes (2021) · cites this paper as [74]

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Authors
Schluter, C., Lam, K. K. Y., Brumm, J., Wu, B. W., Saunders, M., Stevens, T. H., Bryan, J., & Conibear, E.
Affiliations
  • University of British Columbia (CA)
  • University of Oregon (US)
Venue
Molecular Biology of the Cell
Published
2008-04
Volume
19
Issue
4
Pages
1282-1294
ISSN
  • 1059-1524 (ISSN-L)
  • 1939-4586
OpenAlex
W2109180315
Cited by
36
References
71
Citations by year
2026: 4 · 2024: 1 · 2023: 2 · 2022: 2 · 2021: 2 · 2020: 1 · 2018: 4 · 2017: 2 · 2014: 2 · 2013: 2 · 2012: 2
FWCI
1.75
Type
journal article
Language
en
Open access
Locations
  • Molecular Biology of the Cell (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Wayne State University
  • Michael Smith Health Research BC
  • National Institutes of Health (GM32448)
  • Canadian Institutes of Health Research
  • Medical Research Council
  • National Institute of General Medical Sciences (R01GM032448, GM-32448, R37GM032448)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
Keywords
endosomal transport, ESCRT, multivesicular bodies, endosomal maturation, membrane-spanning proteins, protein complex identification, yeast
MeSH terms
Biological Transport, Active, Carboxypeptidases, Carrier Proteins, Genes, Fungal, Multigene Family, Membrane Proteins, Mutation, Phenotype, Endosomes, Saccharomyces cerevisiae, Gene Deletion, Oligonucleotide Array Sequence Analysis, Gene Expression Profiling, Saccharomyces cerevisiae Proteins, Vesicular Transport Proteins, Multiprotein Complexes, Receptors, Mating Factor

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