The Chk2 protein kinase

DNA Repair (Amst). Aug-Sep 2004;3(8-9):1039-47. doi: 10.1016/j.dnarep.2004.03.033.


Checkpoint kinase 2 (Chk2) is a multifunctional enzyme whose functions are central to the induction of cell cycle arrest and apoptosis by DNA damage. Insight into Chk2 has derived from multiple approaches. Biochemical studies have addressed Chk2 structure, domain organization and regulation by phosphorylation. Extensive work has been done to identify factors that recognize and respond to DNA damage in order to activate Chk2. In turn a number of substrates and targets of Chk2 have been identified that play roles in the checkpoint response. The roles and regulation of Chk2 have been elucidated by studies in model genetic systems extending from worms and flies to mice and humans. The relationship of Chk2 to human cancer studies is developing rapidly with increasing evidence that Chk2 plays a role in tumor suppression.

Publication types

  • Research Support, U.S. Gov't, P.H.S.
  • Review

MeSH terms

  • Animals
  • Apoptosis
  • Binding Sites
  • Catalytic Domain
  • Cell Cycle
  • Checkpoint Kinase 2
  • DNA Damage
  • DNA Repair*
  • Enzyme Activation
  • Humans
  • Mice
  • Mice, Knockout
  • Models, Biological
  • Mutation
  • Neoplasms / enzymology
  • Phosphorylation
  • Protein Structure, Tertiary
  • Protein-Serine-Threonine Kinases / chemistry
  • Protein-Serine-Threonine Kinases / metabolism
  • Protein-Serine-Threonine Kinases / physiology*
  • Tumor Suppressor Protein p53 / physiology


  • Tumor Suppressor Protein p53
  • Checkpoint Kinase 2
  • CHEK2 protein, human
  • Chek2 protein, mouse
  • Protein-Serine-Threonine Kinases