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The Path from -Carotene to Carlactone, a Strigolactone-Like Plant Hormone

Tipo de material: TextoTextoSeries ; Science, 335, p.1348-51, 2012Trabajos contenidos:
  • Alder, Adrian
  • Jamil, Muhammad
  • Marzorati, Mattia
  • Bruno, Mark
  • Vermathen, Martina
  • Bigler, Peter
  • Ghisla, Sandro
  • Ghisla, Sandro
  • Beyer, Peter
  • Al-Babili, Salim
Tema(s): Recursos en línea: Resumen: Strigolactones, phytohormones with diverse signaling activities, have a common structure consisting of two lactones connected by an enol-ether bridge. Strigolactones derive from carotenoids via a pathway involving the carotenoid cleavage dioxygenases 7 and 8 (CCD7 and CCD8)and the iron-binding protein D27. We show that D27 is a ?-carotene isomerase that converts all-trans-?-carotene into 9-cis-?-carotene, which is cleaved by CCD7 into a 9-cis-configured aldehyde. CCD8 incorporates three oxygens into 9-cis-?-apo-10?-carotenal and performs molecular rearrangement, linking carotenoids with strigolactones and producing carlactone, a compound with strigolactone-like biological activities. Knowledge of the structure of carlactone will be crucial for understanding the biology of strigolactones and may have applications in combating parasitic weeds.
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Strigolactones, phytohormones with diverse signaling activities, have a common structure consisting of two lactones connected by an enol-ether bridge. Strigolactones derive from carotenoids via a pathway involving the carotenoid cleavage dioxygenases 7 and 8 (CCD7 and CCD8)and the iron-binding protein D27. We show that D27 is a ?-carotene isomerase that converts all-trans-?-carotene into 9-cis-?-carotene, which is cleaved by CCD7 into a 9-cis-configured aldehyde. CCD8 incorporates three oxygens into 9-cis-?-apo-10?-carotenal and performs molecular rearrangement, linking carotenoids with strigolactones and producing carlactone, a compound with strigolactone-like biological activities. Knowledge of the structure of carlactone will be crucial for understanding the biology of strigolactones and may have applications in combating parasitic weeds.

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