Catabolism of camphor in tissue cultures and leaf disks of common sage (Salvia officinalis)
作者:Christoph Funk、Alfred E. Koepp、Rodney Croteau
DOI:10.1016/0003-9861(92)90173-t
日期:1992.4
accumulated in the leaves of common sage (Salvia officinalis), and as the plant approaches maturity the content of this monoterpene ketone decreases by roughly half. Although the ability to catabolize camphor has been demonstrated previously in sage leaf disks, tissue cultures proved to be a more suitable system for examining the responsible degradative pathway. Cell suspension cultures were shown to convert
(+)-樟脑占普通鼠尾草(Salvia officinalis)叶片中积累的单萜的近30%,随着植物成熟,该单萜酮的含量大约减少一半。尽管先前已在鼠尾草叶盘中证明了分解樟脑的能力,但组织培养被证明是一种更合适的系统,用于检查负责任的降解途径。显示细胞悬浮培养物将(+)-[3-3H2]樟脑依次转化为6-羟基樟脑,6-氧樟脑樟脑,α-樟脑酸和2-羟基-α-樟脑酸,以及每个通过色谱和光谱学方法鉴定途径。该氧化性开环序列类似于土壤白喉类,分枝杆菌,最终导致等位代脂体成为最后定义的代谢产物,其中包含原始双环核的所有10个碳。对细胞培养物和叶盘的研究还表明,樟脑通过1,2-樟脑(一种先前描述的鼠尾草叶中的代谢物)的分解代谢是次要的降解途径。在培养的鼠尾草细胞的无细胞提取物中证明了樟脑代谢的第一步,几条证据表明,这种微粒体(+)-樟脑6-外切羟化酶是细胞色素P-450依赖的单加氧酶。是次要的降解途径。在