The path from β-carotene to carlactone, a strigolactone-like plant hormone
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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 β-carotene isomerase that converts all-trans-β-carotene into 9-cis-β-carotene, which is cleaved by CCD7 into a 9-cis–configured aldehyde. CCD8 incorporates three oxygens into 9-cis-β-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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ALDER, Adrian, Muhammad JAMIL, Mattia MARZORATI, Mark BRUNO, Martina VERMATHEN, Peter BIGLER, Sandro GHISLA, Harro BOUWMEESTER, Peter BEYER, Salim AL-BABILI, 2012. The path from β-carotene to carlactone, a strigolactone-like plant hormone. In: Science. 2012, 335(6074), pp. 1348-1351. ISSN 0036-8075. eISSN 1095-9203. Available under: doi: 10.1126/science.1218094BibTex
@article{Alder2012-03-16carot-23568, year={2012}, doi={10.1126/science.1218094}, title={The path from β-carotene to carlactone, a strigolactone-like plant hormone}, number={6074}, volume={335}, issn={0036-8075}, journal={Science}, pages={1348--1351}, author={Alder, Adrian and Jamil, Muhammad and Marzorati, Mattia and Bruno, Mark and Vermathen, Martina and Bigler, Peter and Ghisla, Sandro and Bouwmeester, Harro and Beyer, Peter and Al-Babili, Salim} }
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