Contrasting functions of calreticulin and calnexin in glycoprotein folding and ER quality control
Open accessAbstract
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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Both ANI parents carried only one FKS2 mutation and alterations in CNE1 ortholog.
“Interestingly, both of the ANI parents carried only one FKS2 mutation and alterations in CNE1 ortholog, encoding an endoplasmic reticulum (ER) protein involved in the quality control of misfolded proteins.28”
From Narrow mutational signatures drive acquisition of multidrug resistance in the fungal pathogen Candida glabrata (2021) · cites this paper as [28]
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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
- bronze
- doi.org
- Licence
- 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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