Download MendeleyCrystal structure-guided design of berberine-based novel chitinase inhibitors.
Chen, L., Zhu, L., Chen, J., Chen, W., Qian, X., Yang, Q.(2020) J Enzyme Inhib Med Chem 35: 1937-1943
- PubMed: 33167737
- DOI: https://doi.org/10.1080/14756366.2020.1837123
- Primary Citation of Related Structures:
7C34 - PubMed Abstract:
Glycoside hydrolase family 18 (GH18) chitinases play an important role in various organisms ranging from bacteria to mammals. Chitinase inhibitors have potential applications as pesticides, fungicides, and anti-asthmatics. Berberine, a plant-derived isoquinoline alkaloid, was previously reported to inhibit against various GH18 chitinases with only moderate K i values ranging between 20 and 70 μM. In this report, we present for the first time the berberine-complexed crystal structure of Sm ChiB, a model GH18 chitinase from the bacterium Serratia marcescens . Based on the berberine-binding mode, a hydrophobic cavity-based optimisation strategy was developed to increase their inhibitory activity. A series of berberine derivatives were designed and synthesised, and their inhibitory activities against GH18 chitinases were evaluated. The compound 4c showed 80-fold-elevated inhibitory activity against Sm ChiB and the human chitinase hAMCase with K i values at the sub-micromolar level. The mechanism of improved inhibitory activities was proposed. This work provides a new strategy for developing novel chitinase inhibitors.
Organizational Affiliation:
School of Bioengineering, Dalian University of Technology, Dalian, China.
