Programming of Extra- and Intracellular Protein Coronation through Thiol-Independent Ligand Engineering
Meng-Die Xue1, Yue-Wen Yin2, Liuting Zheng1
1Key Laboratory of Cardiovascular and Cerebrovascular Medicine, Department of Pharmaceutics, Nanjing Medical University, Nanjing 211169, P. R. China.
Abstract:
Variation in the distal end of ligands can impact biological functions, but the effects of the proximal end of the ligand (PEL) are less clear. This study presents poly(ethylene glycol) (PEG) ligands that bind to gold beyond the gold-thiol chemistry. Biotin-PEG-modified nanomaterials showed unique protein corona-assisted uptake due to the TMSB4x orientation. All-atom molecular dynamics and super-resolution imaging reveal that TMSB4x facilitates receptor-ligand binding by expanding the pocket. Photoproximity labeling with chemoetching confirms PEL-dependent intracellular effects. For PEL as lipoic acid, gold functionalization allows nanomaterials to inhibit microfilament assembly and destabilize organelle contact sites, providing an anticancer effect without chemotherapy.
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