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STK4

Introduction

Serine/threonine-protein kinase 4 is an enzyme that in humans is encoded by the STK4 gene.[1][2][3]

Function

Function

The protein encoded by this gene is a cytoplasmic kinase that is structurally similar to the yeast Ste20p (sterile 20 protein) kinase, which acts upstream of the stress-induced mitogen-activated protein kinase (MAPK) cascade. The encoded protein can phosphorylate myelin basic protein and undergoes autophosphorylation. A caspase-cleaved fragment of the encoded protein has been shown to be capable of phosphorylating histone H2B. The particular phosphorylation catalyzed by this protein has been correlated with apoptosis, and it’s possible that this protein induces the chromatin condensation observed in this process.[4]

Interactions

Interactions

STK4 has been shown to interact with PRKRIR.[5]

STK4 has also been shown to prevent, through Yap1 coactivator modulation, haematological tumor cell apoptosis.[6]

References

References

  1. ↑ Taylor LK, Wang HC, Erikson RL (November 1996). “Newly identified stress-responsive protein kinases, Krs-1 and Krs-2”. Proc. Natl. Acad. Sci. U.S.A. 93 (19): 10099–104. doi:10.1073/pnas.93.19.10099. PMCΒ 38343. PMIDΒ 8816758.
  2. ↑ Graves JD, Gotoh Y, Draves KE, Ambrose D, Han DK, Wright M, Chernoff J, Clark EA, Krebs EG (June 1998). “Caspase-mediated activation and induction of apoptosis by the mammalian Ste20-like kinase Mst1”. EMBO J. 17 (8): 2224–34. doi:10.1093/emboj/17.8.2224. PMCΒ 1170567. PMIDΒ 9545236.
  3. ↑ Ura S, Masuyama N, Graves JD, Gotoh Y (August 2001). “Caspase cleavage of MST1 promotes nuclear translocation and chromatin condensation”. Proc. Natl. Acad. Sci. U.S.A. 98 (18): 10148–53. doi:10.1073/pnas.181161698. PMCΒ 56930. PMIDΒ 11517310.
  4. ↑ “Entrez Gene: STK4 serine/threonine kinase 4”.
  5. ↑ Lin Y, Khokhlatchev A, Figeys D, Avruch J (December 2002). “Death-associated protein 4 binds MST1 and augments MST1-induced apoptosis”. J. Biol. Chem. 277 (50): 47991–8001. doi:10.1074/jbc.M202630200. PMIDΒ 12384512.
  6. ↑ Cottini F, Hideshima T, Xu C, Sattler M, Dori M, Agnelli L, ten Hacken E, Bertilaccio MT, Antonini E, Neri A, Ponzoni M, Marcatti M, Richardson PG, Carrasco R, Kimmelman AC, Wong KK, Caligaris-Cappio F, Blandino G, Kuehl WM, Anderson KC, Tonon G (2014). “Rescue of Hippo coactivator YAP1 triggers DNA damage-induced apoptosis in hematological cancers” (PDF). Nat. Med. 20 (6): 599–606. doi:10.1038/nm.3562. PMCΒ 4057660. PMIDΒ 24813251.
Further reading

Further reading