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Structural basis of NF-κB signaling by the p75 neurotrophin receptor interaction with adaptor protein TRADD through their respective death domains. | LitMetric

Structural basis of NF-κB signaling by the p75 neurotrophin receptor interaction with adaptor protein TRADD through their respective death domains.

J Biol Chem

School of Life Sciences, Tianjin University, Tianjin, PR China; Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures, School of Life Sciences, Tianjin University, Tianjin, PR China; Department of Physiology, National University of Singapore, Singapore; Life Sciences Institute, National University of Singapore, Singapore. Electronic address:

Published: August 2021

AI Article Synopsis

Article Abstract

The p75 neurotrophin receptor (p75) is a critical mediator of neuronal death and tissue remodeling and has been implicated in various neurodegenerative diseases and cancers. The death domain (DD) of p75 is an intracellular signaling hub and has been shown to interact with diverse adaptor proteins. In breast cancer cells, binding of the adaptor protein TRADD to p75 depends on nerve growth factor and promotes cell survival. However, the structural mechanism and functional significance of TRADD recruitment in neuronal p75 signaling remain poorly understood. Here we report an NMR structure of the p75-DD and TRADD-DD complex and reveal the mechanism of specific recognition of the TRADD-DD by the p75-DD mainly through electrostatic interactions. Furthermore, we identified spatiotemporal overlap of p75 and TRADD expression in developing cerebellar granule neurons (CGNs) at early postnatal stages and discover the physiological relevance of the interaction between TRADD and p75 in the regulation of canonical NF-κB signaling and cell survival in CGNs. Our results provide a new structural framework for understanding how the recruitment of TRADD to p75 through DD interactions creates a membrane-proximal platform, which can be efficiently regulated by various neurotrophic factors through extracellular domains of p75, to propagate downstream signaling in developing neurons.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8318917PMC
http://dx.doi.org/10.1016/j.jbc.2021.100916DOI Listing

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