Nature Communications (Apr 2024)

Nardilysin-regulated scission mechanism activates polo-like kinase 3 to suppress the development of pancreatic cancer

  • Jie Fu,
  • Jianhua Ling,
  • Ching-Fei Li,
  • Chi-Lin Tsai,
  • Wenjuan Yin,
  • Junwei Hou,
  • Ping Chen,
  • Yu Cao,
  • Ya’an Kang,
  • Yichen Sun,
  • Xianghou Xia,
  • Zhou Jiang,
  • Kenei Furukawa,
  • Yu Lu,
  • Min Wu,
  • Qian Huang,
  • Jun Yao,
  • David H. Hawke,
  • Bih-Fang Pan,
  • Jun Zhao,
  • Jiaxing Huang,
  • Huamin Wang,
  • E. I. Mustapha Bahassi,
  • Peter J. Stambrook,
  • Peng Huang,
  • Jason B. Fleming,
  • Anirban Maitra,
  • John A. Tainer,
  • Mien-Chie Hung,
  • Chunru Lin,
  • Paul J. Chiao

DOI
https://doi.org/10.1038/s41467-024-47242-3
Journal volume & issue
Vol. 15, no. 1
pp. 1 – 19

Abstract

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Abstract Pancreatic ductal adenocarcinoma (PDAC) develops through step-wise genetic and molecular alterations including Kras mutation and inactivation of various apoptotic pathways. Here, we find that development of apoptotic resistance and metastasis of Kras G12D -driven PDAC in mice is accelerated by deleting Plk3, explaining the often-reduced Plk3 expression in human PDAC. Importantly, a 41-kDa Plk3 (p41Plk3) that contains the entire kinase domain at the N-terminus (1-353 aa) is activated by scission of the precursor p72Plk3 at Arg354 by metalloendopeptidase nardilysin (NRDC), and the resulting p32Plk3 C-terminal Polo-box domain (PBD) is removed by proteasome degradation, preventing the inhibition of p41Plk3 by PBD. We find that p41Plk3 is the activated form of Plk3 that regulates a feed-forward mechanism to promote apoptosis and suppress PDAC and metastasis. p41Plk3 phosphorylates c-Fos on Thr164, which in turn induces expression of Plk3 and pro-apoptotic genes. These findings uncover an NRDC-regulated post-translational mechanism that activates Plk3, establishing a prototypic regulation by scission mechanism.