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A promiscuous kinase inhibitor delineates the conspicuous structural features of protein kinase CK2a1

Masato Tsuyuguchi1, Tetsuko Nakaniwa2, Masaaki Sawa3

  • 1Graduate School of Science, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.

Acta Crystallographica. Section F, Structural Biology Communications
|July 9, 2019
PubMed

Insights

The crystal structure of protein kinase CK2a1 complexed with 5-iodotubercidin was determined. This finding aids in developing selective inhibitors for cancer and glomerulonephritis therapies.

Area of Science:

  • Biochemistry
  • Structural Biology
  • Medicinal Chemistry

Background:

  • Protein kinase CK2a1 is vital for cell growth, proliferation, and survival.
  • CK2a1 is a validated therapeutic target for tumors and glomerulonephritis.

Purpose of the Study:

  • To determine the crystal structure of the CK2a1 kinase domain bound to 5-iodotubercidin (5IOD).
  • To provide structural insights for developing selective CK2a1 inhibitors.

Main Methods:

  • X-ray crystallography was used to determine the structure at 1.78 Å resolution.
  • Comparative analysis of CK2a1-5IOD complex with five off-target kinases complexed with 5IOD.

Main Results:

  • The crystal structure of the CK2a1 kinase domain in complex with 5IOD was successfully elucidated.
  • Distinct structural features of the CK2a1-5IOD complex were identified.
  • Comparison with off-target kinases revealed potential for selective inhibitor design.

Conclusions:

  • The determined structure offers valuable information for the rational design of highly selective CK2a1 inhibitors.
  • This structural data can guide the development of novel therapeutics for CK2a1-related diseases.
Keywords:
ATP-analogue inhibitoroff-target kinasesprotein kinase CK2selectivitystructural comparison

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