Abstract
Cathepsin K and S are two isoforms of cysteine protease with diverse biological functions in the aspect of osteoporosis and autoimmune diseases. Accordingly, the homologous sequence and similar binding site features among CTSK/S may lead to unselective inhibition and side effects. To address such issue, various computational strategies were applied in the current study to explore the selectivity mechanism of CTSK/S inhibitors, including sequence alignment, molecular docking, MD simulations, MM/GBSA energy calculation, and so on. Our findings highlight the notable effects of CTSK residues Glu59 and Tyr67, as well as CTSS residue Asn67, on inhibition selectivity. Overall, this study provides an informative guideline for the rational design of CTSK/S selective inhibitors.
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This work was supported by an award from the Taishan Industry Leading Talents Project (2018TSCYCX-03).
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Qinyi Zhong and Jiasi Luan wrote the main manuscript text, and Baichun Hu and Yan Ma prepared the data. All authors reviewed the manuscript.
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Zhong, Q., Luan, J., Hu, B. et al. Binding mechanism of selective cathepsin K/S inhibition revealed from molecular simulations. Struct Chem 34, 1911–1925 (2023). https://doi.org/10.1007/s11224-023-02136-w
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DOI: https://doi.org/10.1007/s11224-023-02136-w