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• W2003205870 endingPage "984" @default.
• W2003205870 startingPage "967" @default.
• W2003205870 abstract "Nerve growth factor (NGF) is initially synthesized as a precursor, proNGF, that is cleaved to release its C-terminal mature form. Recent studies suggested that proNGF is not an inactive precursor but acts as a signaling ligand distinct from its mature counterpart. proNGF and mature NGF initiate opposing biological responses by utilizing both distinct and shared receptor components. In this study, we carried out structural and biochemical characterization of proNGF interactions with p75NTR and sortilin. We crystallized proNGF complexed to p75NTR and present the structure at 3.75-A resolution. The structure reveals a 2:2 symmetric binding mode, as compared with the asymmetric structure of a previously reported crystal structure of mature NGF complexed to p75NTR and the 2:2 symmetric complex of neurotrophin-3 (NT-3) and p75NTR. Here, we discuss the possible origins and implications of the different stoichiometries. In the proNGF-p75NTR complex, the pro regions of proNGF are mostly disordered and two hairpin loops (loop 2) at the top of the NGF dimer have undergone conformational changes in comparison with mature NT structures, suggesting possible interactions with the propeptide. We further explored the binding characteristics of proNGF to sortilin using surface plasmon resonance and cell-based assays and determined that calcium ions promote the formation of a stable ternary complex of proNGF-sortilin-p75NTR. These results, together with those of previous structural and mechanistic studies of NT-receptor interactions, suggest the potential for distinct signaling activities through p75NTR mediated by different NT-induced conformational changes." @default.
• W2003205870 created "2016-06-24" @default.
• W2003205870 creator A5011933357 @default.
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• W2003205870 date "2010-03-01" @default.
• W2003205870 modified "2023-10-17" @default.
• W2003205870 title "Molecular and Structural Insight into proNGF Engagement of p75NTR and Sortilin" @default.
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• W2003205870 doi "https://doi.org/10.1016/j.jmb.2009.12.030" @default.
• W2003205870 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2847487" @default.
• W2003205870 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20036257" @default.
• W2003205870 hasPublicationYear "2010" @default.
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