20Jul 2022
Kaiso phosphorylation at threonine 606 leads to its accumulation in the cytoplasm, reducing its transcriptional repression of the tumor suppressor CDH1

Kaiso phosphorylation at threonine 606 leads to its accumulation in the cytoplasm, reducing its transcriptional repression of the tumor suppressor CDH1

This study reported that RAC‐alpha serine/threonine‐protein kinase (AKT1) could phosphorylate threonine residue 606 (T606) within the RSSTIP motif of Kaiso in the cytoplasm. The T606‐phosphorylated Kaiso (pT606‐Kaiso) could directly bind to 14‐3‐3 family proteins, and the depletion of T606 phosphorylation by T606A mutation abolished most of the Kaiso–14‐3‐3 binding. In conclusion, Kaiso could be phosphorylated at T606 by AKT1, and pT606‐Kaiso accumulates in the cytoplasm through binding to 14‐3‐3/P120ctn, which de‐represses the Kaiso target gene CDH1 in normal tissues. Therefore, decreased Kaiso phosphorylation might contribute to the development of gastrointestinal cancer. Therefore, the status of Kaiso phosphorylation is a determinant factor for the role of Kaiso in cancer development.

  • #oncology

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