Emerging roles of cyclin-dependent kinase 7 in health and diseases.

Cyclin-dependent kinase 7 (CDK7) regulates cell cycle and transcription, which are central for cancer progression. CDK7 inhibitors exhibit substantial anticancer activities in preclinical studies and are currently being evaluated in clinical trials. CDK7 is widely expressed in the body. However, the impact of CDK7 inhibition on normal tissues has received little attention. Here, we review the biological functions of CDK7, followed by its emerging roles in development, homeostasis and diseases. We discuss the regulatory mechanisms of CDK7 kinase activation and provide an overview of CDK7 substrates identified to date. Moreover, we highlight unanswered questions and propose key areas for future investigation. An advanced understanding of CDK7 will facilitate the pharmaceutical development of CDK7 inhibitors and help minimize undesirable adverse effects.

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Declaration of interests The authors declare no competing interests.