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- W3183182675 abstract "The Notch signaling system links cellular fate to that of its neighbors, driving proliferation, apoptosis, and cell differentiation in metazoans, whereas dysfunction leads to debilitating developmental disorders and cancers. Other than a five-by-five domain complex, it is unclear how the 40 extracellular domains of the Notch1 receptor collectively engage the 19 domains of its canonical ligand, Jagged1, to activate Notch1 signaling. Here, using cross-linking mass spectrometry (XL-MS), biophysical, and structural techniques on the full extracellular complex and targeted sites, we identify five distinct regions, two on Notch1 and three on Jagged1, that form an interaction network. The Notch1 membrane-proximal regulatory region individually binds to the established Notch1 epidermal growth factor (EGF) 8-EGF13 and Jagged1 C2-EGF3 activation sites as well as to two additional Jagged1 regions, EGF8-EGF11 and cysteine-rich domain. XL-MS and quantitative interaction experiments show that the three Notch1-binding sites on Jagged1 also engage intramolecularly. These interactions, together with Notch1 and Jagged1 ectodomain dimensions and flexibility, determined by small-angle X-ray scattering, support the formation of nonlinear architectures. Combined, the data suggest that critical Notch1 and Jagged1 regions are not distal but engage directly to control Notch1 signaling, thereby redefining the Notch1-Jagged1 activation mechanism and indicating routes for therapeutic applications." @default.
- W3183182675 created "2021-08-02" @default.
- W3183182675 creator A5003083941 @default.
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- W3183182675 date "2021-07-23" @default.
- W3183182675 modified "2023-10-16" @default.
- W3183182675 title "Notch–Jagged signaling complex defined by an interaction mosaic" @default.
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- W3183182675 doi "https://doi.org/10.1073/pnas.2102502118" @default.
- W3183182675 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8325348" @default.
- W3183182675 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34301900" @default.
- W3183182675 hasPublicationYear "2021" @default.
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