A Toolkit for Studying Cell Surface Shedding of Diverse Transmembrane Receptors
Affiliations
Proteolysis of transmembrane receptors is a critical cellular communication mechanism dysregulated in disease, yet decoding proteolytic regulation mechanisms of hundreds of shed receptors is hindered by difficulties controlling stimuli and unknown fates of cleavage products. Notch proteolytic regulation is a notable exception, where intercellular forces drive exposure of a cryptic protease site within a juxtamembrane proteolytic switch domain to activate transcriptional programs. We created a Synthetic Notch Assay for Proteolytic Switches (SNAPS) that exploits the modularity and unequivocal input/response of Notch proteolysis to screen surface receptors for other putative proteolytic switches. We identify several new proteolytic switches among receptors with structural homology to Notch. We demonstrate SNAPS can detect shedding in chimeras of diverse cell surface receptors, leading to new, testable hypotheses. Finally, we establish the assay can be used to measure modulation of proteolysis by potential therapeutics and offer new mechanistic insights into how DECMA-1 disrupts cell adhesion.
Anderson M, Hayward A, Smiley A, Shi K, Pawlak M, Aird E Structure. 2024; 32(11):1984-1996.e5.
PMID: 39305901 PMC: 11560575. DOI: 10.1016/j.str.2024.08.019.
Hiscox M, Wasmuth A, Williams C, Foot J, Wiedermann G, Fadda V PLoS One. 2024; 19(4):e0301175.
PMID: 38574067 PMC: 10994368. DOI: 10.1371/journal.pone.0301175.
New tricks for an old pathway: emerging Notch-based biotechnologies and therapeutics.
Medina E, Perez D, Antfolk D, Luca V Trends Pharmacol Sci. 2023; 44(12):934-948.
PMID: 37891017 PMC: 10841456. DOI: 10.1016/j.tips.2023.09.011.
Engineering the Interactions of Classical Cadherin Cell-Cell Adhesion Proteins.
Sivasankar S, Xie B J Immunol. 2023; 211(3):343-349.
PMID: 37459190 PMC: 10361579. DOI: 10.4049/jimmunol.2300098.
Modular design of synthetic receptors for programmed gene regulation in cell therapies.
Zhu I, Liu R, Garcia J, Hyrenius-Wittsten A, Piraner D, Alavi J Cell. 2022; 185(8):1431-1443.e16.
PMID: 35427499 PMC: 9108009. DOI: 10.1016/j.cell.2022.03.023.