Authors
Joo, J. H., Kasberg, W., Douglas, S., Udoh, U., Carisey, A., Messing, J., Wang, Y.-D., Narina, S., Pruett-Miller, S. M., Labelle, M., Lippincott-Schwartz, J., Chang, C.-L., Kundu, M.
Abstract
Cancer cells adapt to nutrient stress by remodeling the repertoire of proteins on their surface, enabling survival and progression under starvation conditions. However, the molecular mechanisms by which nutrient cues reshape the cell surface proteome to influence cell behavior remain largely unresolved. Here, we show that acute glucose starvation, but not amino acid deprivation or mTOR inhibition, selectively impairs ER-to-Golgi export of specific cargoes, such as E-cadherin, in a SEC24C-dependent manner. Quantitative cell surface proteomics reveal that glucose deprivation remodels the cell surface proteome, notably reducing surface expression of key adhesion molecules. This nutrient-sensitive reprogramming enhances cell migration in vitro and promotes metastasis in vivo. Mechanistically, we show that AMPK and ULK1 signaling orchestrate this process independent of autophagy, with ULK1-mediated phosphorylation of SEC31A driving SEC24C-dependent COPII reorganization. These findings establish ER-to-Golgi trafficking as a nutrient-sensitive regulatory node that links metabolic stress to cell surface remodeling and metastatic potential.
Preprint server:
bioRxiv
The authors list and abstract were imported from bioRxiv on 02 Nov 2025.
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