作者:Alejandro F. Barrero、M. Mar Herrador、Pilar Arteaga、Jesús Gil、Jose-Antonio González、Eugenio Alcalde、Enrique Cerdá-Olmedo
DOI:10.1039/c1ob05712j
日期:——
Mixed cultures of strains of opposite sex (âmatedâ cultures) of Blakeslea trispora contain trisporic acids and other apocarotenoids, some of which mediate the sexual responses of this fungus and other Mucorales. In mated cultures of the wild-type strains F986 and F921 we identified eleven apocarotenoids: two C18 trisporoids, three C15 compounds with a monocyclofarnesane skeleton, a C13 compound, and five C7 compounds with a 2-methylhexane skeleton. Six of them are new natural products and two others are new for Blakeslea. Their structures were established by NMR and mass spectra and those of the C7 and C13 compounds were confirmed by chemical synthesis. The finding of these compounds and the presence of approximately equimolecular amounts of the C18, C15, and C7 families led to the conclusion that β-carotene is initially split in three fragments by cleavage of its 13,14 and 11â²,12â² double bonds.
Blakeslea trispora的异性菌株混合培养物("交配培养物")中含有三孢子酸和其他类胡萝卜素,其中一些类胡萝卜素介导了这种真菌和其他真菌的性反应。在野生型菌株 F986 和 F921 的交配培养物中,我们发现了 11 种类胡萝卜素:2 种 C18 三孢子酸、3 种以单环法呢烷为骨架的 C15 化合物、1 种 C13 化合物和 5 种以 2-甲基己烷为骨架的 C7 化合物。其中 6 个是新的天然产物,另外 2 个是新的 Blakeslea 天然产物。通过核磁共振和质谱确定了它们的结构,并通过化学合成确认了 C7 和 C13 化合物的结构。这些化合物的发现以及 C18、C15 和 C7 家族近似等分子量的存在,使我们得出结论:δ-胡萝卜素最初是通过裂解其 13、14 和 11â²,12â² 双键而分裂成三个片段的。