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Human CDK12 and CDK13, multi-tasking CTD kinases for the new millenium.

Arno L Greenleaf1

  • 1a Department of Biochemistry , Duke University School of Medicine , Durham , NC , USA.

Transcription
|October 16, 2018
PubMed
Summary

Cyclin-dependent kinase 12 (CDK12) and CDK13 are CTD kinases crucial for gene expression and genome stability. CDK12 acts as a tumor suppressor, highlighting its medical relevance in cancer research.

Keywords:
C-terminal repeat domainCTDCTD phosphorylationRNA polymerase IIco-transcriptional processes

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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Genetics

Background:

  • CDK12 and CDK13, discovered as nucleotide sequences encoding protein kinases, are related to cell cycle CDKs.
  • Both proteins function as CTD (C-terminal repeat domain of POLR2A) kinases, forming heterodimers with a Cyclin K subunit.

Purpose of the Study:

  • This review summarizes current research on CDK12 and CDK13, evaluating findings and placing them in context.
  • It aims to highlight the distinct roles of CDK12 and CDK13 and identify future research directions, particularly in cancer biology.

Main Methods:

  • Literature review of studies on CDK12 and CDK13.
  • Analysis of the functional roles of these kinases in gene expression and genome stability.

Main Results:

  • CDK12 plays critical roles in gene expression, RNA processing, and genome stability through CTD phosphorylation of transcribing RNAPII.
  • CDK13 is functionally distinct from CDK12, involved in gene expression with likely undiscovered roles.
  • CDK12 functions as a tumor suppressor in ovarian and prostate cancers.

Conclusions:

  • Understanding of CDK12 and CDK13 is maturing, but further research is needed.
  • Future research should focus on elucidating how the loss of CDK12 and CDK13 contributes to cancer development.
  • Investigating therapeutic interventions targeting these pathways is a key future challenge.