Drug targets are special molecules that can interact with drugs and exert pharmacological functions in human body. The natural active small molecules are the bioactive basis of traditional Chinese medicine, and the mechanism study is a hot topic now, especially for the identification of their target proteins. However, little progress has been made in this field until now. Here, we summarized the recent technologies and methods for the identification of target proteins of natural bioactive small molecules, and introduced the main research methods, principles and successful cases in this field. We also explored the applicability and discussed the advantages and disadvantages among different methods. We hope this review can be used as a reference for the researchers who engaged in natural pharmaceutical chemistry, pharmacology and chemical biology.
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