Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 43, Pages 19153-19161Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202006727
Keywords
catenanes; lasso proteins; p53; slide-ring gels; topology
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Funding
- National Natural Science Foundation of China [21925102, 21991132, 21674003]
- Beijing National Laboratory for Molecular Sciences [BNLMS-CXXM-202006]
- Clinical Medicine Plus X project of Peking University, Fundamental Research Funds for the Central Universities
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [2019R1C1C11008414]
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Entangled proteins have attracted significant research interest. Herein, we report the first rationally designed lasso proteins, or protein [1]rotaxanes, by using a p53dim-entwined dimer for intramolecular entanglement and a SpyTag-SpyCatcher reaction for side-chain ring closure. The lasso structures were confirmed by proteolytic digestion, mutation, NMR spectrometry, and controlled ligation. Their dynamic properties were probed by experiments such as end-capping, proteolytic digestion, and heating/cooling. As a versatile topological intermediate, a lasso protein could be converted to a rotaxane, a heterocatenane, and a slide-ring network. Being entirely genetically encoded, this robust and modular lasso-protein motif is a valuable addition to the topological protein repertoire and a promising candidate for protein-based biomaterials.
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