STN 7

STN 7
Andere Namen
  • Protein STATE TRANSITION 7
  • Stt7 homolog
  • STN 7
Masse/Länge Primärstruktur 562 Aminosäuren, 63.252 Da
Bezeichner
Externe IDs
Enzymklassifikation
EC, Kategorie 2.7.11.1, Kinase
Vorkommen
Homologie-Familie Hovergen
Übergeordnetes Taxon Pflanzen

STN 7 ist vermutlich ein Enzym, das zusammen mit STN 8 die Phosphorylierungen in Thylakoiden von Chloroplasten im Zuge der Photosynthese bewirkt.

Eigenschaften

Es wird angenommen, dass STN 7 eine Kinase und ein Transmembranprotein ist, welche vor allem die Phosphorylierung im Lichtsammelkomplex 2 katalysiert, wodurch der Lichtsammelkomplex II vom Photosystem II freigesetzt wird und die Diffusion entlang der Biomembran zum Photosystem I ermöglicht wird.[1][2] Die komplementäre Phosphatase zu STN7 ist PPH1.[3]

Literatur

  • R. Fristedt, A. V. Vener: High light induced disassembly of photosystem II supercomplexes in Arabidopsis requires STN7-dependent phosphorylation of CP29. In: PLoS One. Band 6, Nr. 9, 2011, S. e24565.
  • B. Ingelsson, A. V. Vener: Phosphoproteomics of Arabidopsis chloroplasts reveals involvement of the STN7 kinase in phosphorylation of nucleoid protein pTAC16. In: FEBS Lett. Band 586, Nr. 9, 7. Mai 2012, S. 1265–1271.
  • S. Bellafiore, F. Barneche, G. Peltier, J.-D. Rochaix: State transitions and light adaptation require chloroplast thylakoid protein kinase STN7. In: Nature. Band 433, 2005, S. 892–895.
  • P. Pesaresi, A. Hertle, M. Pribil, T. Kleine, R. Wagner, H. Strissel, A. Ihnatowicz, V. Bonardi, M. Scharfenberg, A. Schneider, T. Pfannschmidt, D. Leister: Arabidopsis STN7 kinase provides a link between short- and long-term photosynthetic acclimation. In: Plant Cell. Band 21, 2009, S. 2402–2423.
  • Pádraic J. Flood, Lan Yin, Andrei Herdean, Jeremy Harbinson, Mark G. M. Aarts, Cornelia Spetea: Natural variation in phosphorylation of photosystem II proteins in Arabidopsis thaliana: is it caused by genetic variation in the STN kinases? In: Philosophical Transactions B of the Royal Society. March 2014. doi:10.1098/rstb.2013.0499

Einzelnachweise

  1. ↑ Tobias Wunder, Wenteng Xu, Qiuping Liu, Gerhard Wanner, Dario Leister, Mathias Pribil: The major thylakoid protein kinases STN7 and STN8 revisited: effects of altered STN8 levels and regulatory specificities of the STN kinases. In: Frontiers in Plant Science. 4, 2013, doi:10.3389/fpls.2013.00417. PMID 24151498. PMC 3801152 (freier Volltext).
  2. ↑ M. Pribil, M. Labs, D. Leister: Structure and dynamics of thylakoids in land plants. In: Journal of Experimental Botany. 65, 2014, S. 1955, doi:10.1093/jxb/eru090. PMID 24622954.
  3. ↑ Jean-David Rochaix: Redox Regulation of Thylakoid Protein Kinases and Photosynthetic Gene Expression. In: Antioxidants & Redox Signaling. 18, 2013, S. 2184, doi:10.1089/ars.2012.5110. PMID 23339452. PMC 3629850 (freier Volltext).

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