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CDK9 keeps RNA polymerase II on track.

Sylvain Egloff¹

¹Molecular, Cellular and Developmental Biology Department (MCD), Centre de Biologie Intégrative (CBI), University of Toulouse, CNRS, UPS, 31062, Toulouse, France. sylvain.egloff@univ-tlse3.fr.

Cellular and Molecular Life Sciences : CMLS

|June 19, 2021

Summary

Cyclin-dependent kinase 9 (CDK9) is vital for gene transcription by releasing paused RNA polymerase II. Dysregulation of CDK9 is linked to human diseases, highlighting its importance in gene expression regulation.

Keywords:

7SK RNA Cyclin T1 HIV Promoter-proximal pausing RNA polymerase II CTD Transcriptional checkpoint

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Published on: October 22, 2018

Area of Science:

Molecular Biology
Gene Expression Regulation

Background:

Cyclin-dependent kinase 9 (CDK9) is the kinase subunit of positive transcription elongation factor b (P-TEFb).
CDK9 is crucial for the productive elongation phase of transcription by RNA polymerase II (RNAPII).
It facilitates the release of paused RNAPII at gene promoters, enabling full-length mRNA synthesis.

Purpose of the Study:

To provide an overview of CDK9 function and regulation.
To emphasize the role of CDK9 dysregulation in human pathologies.
To highlight the expanding understanding of CDK9's regulatory roles in gene expression.

Main Methods:

Literature review of CDK9 function, regulation, and disease association.
Analysis of recent findings on P-TEFb-dependent processes.
Synthesis of information on CDK9's role in transcription initiation, elongation, and termination.

Main Results:

CDK9 coordinates transcription initiation, elongation, and termination.
New factors involved in P-TEFb-dependent processes have been identified.
Aberrant CDK9 activity is associated with various human diseases, including cancers.

Conclusions:

CDK9 plays a critical role in efficient gene expression.
Understanding CDK9 regulation is essential for addressing associated human diseases.
Further research into CDK9's expanding functions is warranted.