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STN8  -  serine/threonine-protein kinase STN8

Arabidopsis thaliana

Synonyms: STATE TRANSITION 8, State transition 8, T20L15.190, T20L15_190
 
 
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High impact information on STN8

  • Phosphorylation of Thr-4 in the wild type required both light and prior phosphorylation at Thr-2, indicating that STN8 is a light-activated kinase that phosphorylates Thr-4 only after another kinase phosphorylates Thr-2 [1].
  • Combination of reversed genetics with analyses of in vivo protein phosphorylation in Arabidopsis thaliana revealed that STN8 protein kinase is specific in phosphorylation of N-terminal threonine residues in D1, D2, and CP43 proteins, and Thr-4 in the PsbH protein of photosystem II [1].
  • Acclimation to changes in light quality is defective in stn7 but not in stn8 mutants, indicating that short-term and long-term photosynthetic adaptations are coupled [2].
 

Biological context of STN8

References

  1. STN8 protein kinase in Arabidopsis thaliana is specific in phosphorylation of photosystem II core proteins. Vainonen, J.P., Hansson, M., Vener, A.V. J. Biol. Chem. (2005) [Pubmed]
  2. Photosystem II core phosphorylation and photosynthetic acclimation require two different protein kinases. Bonardi, V., Pesaresi, P., Becker, T., Schleiff, E., Wagner, R., Pfannschmidt, T., Jahns, P., Leister, D. Nature (2005) [Pubmed]
 
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