Cited by 134Cellular transport and secretionCholesterol and Lipid MetabolismCaveolin-1 and cellular processes

The DOI matches its Crossref record; 106 of the 106 references it cites were found in a registry or an index.

A Single Common Portal for Clathrin-mediated Endocytosis of Distinct Cargo Governed by Cargo-selective Adaptors

Open access

Abstract

Sorting of transmembrane cargo into clathrin-coated vesicles requires endocytic adaptors, yet RNA interference (RNAi)-mediated gene silencing of the AP-2 adaptor complex only disrupts internalization of a subset of clathrin-dependent cargo. This suggests alternate clathrin-associated sorting proteins participate in cargo capture at the cell surface, and a provocative recent proposal is that discrete endocytic cargo are sorted into compositionally and functionally distinct clathrin coats. We show here that the FXNPXY-type internalization signal within cytosolic domain of the LDL receptor is recognized redundantly by two phosphotyrosine-binding domain proteins, Dab2 and ARH; diminishing both proteins by RNAi leads to conspicuous LDL receptor accumulation at the cell surface. AP-2–dependent uptake of transferrin ensues relatively normally in the absence of Dab2 and ARH, clearly revealing delegation of sorting operations at the bud site. AP-2, Dab2, ARH, transferrin, and LDL receptors are all present within the vast majority of clathrin structures at the surface, challenging the general existence of specialized clathrin coats for segregated internalization of constitutively internalized cargo. However, Dab2 expression is exceptionally low in hepatocytes, likely accounting for the pathological hypercholesterolemia that accompanies ARH loss.

Overview

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Crossref · 10.1091/mbc.e06-05-0421

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106 of 106 references verified0 citation errors · 0 not checkable

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Research works printed but not linked: 4

  1. Hubbard A. L., 1983, I. Presence of the three major domains. J. Cell Biol, 96, 217
  2. Maurer M. E., 2006, J. Cell Sci
  3. Sanan D. A., 1987, Ultrastructural evidence for dispersed receptors. Histochemistry, 86, 517
  4. Wollenberg G. K., 1987, Cancer Res, 47, 6595

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Metadata

Authors
Keyel, P. A., Mishra, S. K., Roth, R., Heuser, J. E., Watkins, S. C., & Traub, L. M.
Affiliations
  • University of Pittsburgh (US)
  • Washington University in St. Louis (US)
Venue
Molecular Biology of the Cell
Published
2006-10
Volume
17
Issue
10
Pages
4300-4317
ISSN
  • 1059-1524 (ISSN-L)
  • 1939-4586
OpenAlex
W1970268623
Cited by
134
References
106
Citations by year
2026: 3 · 2025: 2 · 2024: 2 · 2023: 3 · 2022: 2 · 2021: 2 · 2020: 3 · 2019: 2 · 2018: 5 · 2017: 3 · 2016: 4 · 2015: 7 · 2014: 10 · 2013: 15 · 2012: 15
FWCI
3.75
Type
journal article
Language
en
Open access
Locations
  • Molecular Biology of the Cell (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed (publishedVersion)
  • Digital Commons@Becker (Washington University School of Medicine) (submittedVersion)
Funders
  • American Heart Association
  • National Institutes of Health
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK053249)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Cholesterol and Lipid Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Caveolin-1 and cellular processes
Keywords
clathrin-mediated endocytosis, AP-2, Dab2, ArH+, LDL receptor, transferrin uptake, phosphotyrosine binding domain, receptor sorting, hepatocytes, hypercholesterolemia, RNA interference
MeSH terms
Animals, Cells, Cultured, Clathrin, Coated Pits, Cell-Membrane, Endocytosis, Golgi Apparatus, HeLa Cells, Humans, Cholesterol, LDL, Receptors, LDL, Transfection, ras GTPase-Activating Proteins, Protein Transport, Clathrin-Coated Vesicles, Hepatocytes, Adaptor Protein Complex 2, RNA Interference, Cell Line, Tumor, Adaptor Proteins, Signal Transducing, Rats

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