Cited by 221Endoplasmic Reticulum Stress and DiseaseHeat shock proteins researchCellular transport and secretion

Contrasting functions of calreticulin and calnexin in glycoprotein folding and ER quality control

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Molinari, Maurizio, Eriksson, Klara Kristin, Calanca, Verena, Galli, Carmela, Cresswell, Peter, Michalak, Marek, Helenius, Ari·2004·Molecular Cell

Abstract

Calreticulin and calnexin are homologous lectins that serve as molecular chaperones for glycoproteins in the endoplasmic reticulum of eukaryotic cells. Here we show that calreticulin depletion specifically accelerates the maturation of cellular and viral glycoproteins with a modest decrease in folding efficiency. Calnexin depletion prevents proper maturation of some proteins such as influenza hemagglutinin but does not interfere appreciably with the maturation of several others. A dramatic loss of stringency in the ER quality control with transport at the cell surface of misfolded glycoprotein conformers is only observed when substrate access to both calreticulin and calnexin is prevented. Although not fully interchangeable during assistance of glycoprotein folding, calreticulin and calnexin may work, independently, as efficient and crucial factors for retention in the ER of nonnative polypeptides.

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Crossref · 10.1016/s1097-2765(03)00494-5

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63 of 63 references verified0 citation errors · 0 not checkable

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Authors
Molinari, M., Eriksson, K. K., Calanca, V., Galli, C., Cresswell, P., Michalak, M., & Helenius, A.
Affiliations
  • Institute for Research in Biomedicine (CH)
  • Howard Hughes Medical Institute (US)
  • University of Alberta (CA)
  • ETH Zurich (CH)
Corresponding author
Molinari, Maurizio
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2004-01
Volume
13
Issue
1
Pages
125-135
ISSN
1097-2765 (ISSN-L)
OpenAlex
W2004816473
Cited by
221
References
63
Citations by year
2026: 5 · 2025: 4 · 2024: 1 · 2023: 5 · 2022: 6 · 2021: 9 · 2020: 9 · 2019: 7 · 2018: 9 · 2017: 4 · 2016: 10 · 2015: 11 · 2014: 9 · 2013: 9 · 2012: 9
FWCI
7.40
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Endoplasmic Reticulum Stress and Disease
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
Keywords
calreticulin, calnexin, glycoprotein folding, endoplasmic reticulum quality control, lectins, molecular chaperones, influenza hemagglutinin, viral glycoproteins, protein maturation
MeSH terms
Animals, Biological Transport, Active, Cells, Cultured, Cysteine, Embryo, Mammalian, Endoplasmic Reticulum, Fibroblasts, Glycoproteins, Hemagglutinins, Viral, Humans, Kinetics, Oxidation-Reduction, Substrate Specificity, T-Lymphocytes, Leukemia-Lymphoma, Adult T-Cell, Protein Folding, Mice, Knockout, Molecular Chaperones, Calnexin, Calreticulin, Cell Line, Tumor, Mice, Rats

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