2017年3月29日, 美國化學學會(ACS)旗下國際著名學術期刊《Organic Letters》線上發表了中國科學院上海生命科學研究院植物生理生態研究所王勇研究員課題組與中國科學院遺傳與發育生物學研究所王國棟研究員課題組合作的一篇題為“(+)-Thalianatriene and (-)-Retigeranin B Catalyzed by Sesterterpene Synthases from Arabidopsis thaliana”的研究論文。
二倍半萜類化合物由五個異戊二烯單元衍生而來, 多分離自海洋生物、陸生真菌等來源, 具有抗炎、拒食、抗血小板凝集、抗病原微生物等生物活性。 人們對該類化合物在植物中的分佈、功能, 特別是生物合成途徑(酶和對應編碼基因)還知之甚少。 本研究利用了萜類代謝途徑改造的大腸桿菌底盤細胞,
原文連結:
(+)-Thalianatriene and (−)-Retigeranin B Catalyzed by Sesterterpene Synthases from Arabidopsis thaliana
原文摘要:
Two GFPPS linked (+)-thalianatriene (1) and (−)-retigeranin B (2) sesterterpene synthase GENEs were identified from the genome of Arabidopsis thaliana. 1 possesses an unprecedented 11–6–5 tricyclic ring system, while 2 contains a characteristic 5–5–5–6–5 pentacyclic ring system. Their structures were determined by extensive NMR spectroscopy, chemical derivatization, and X-ray crystallography. The variable-temp NMR measurement of 3, a diepoxy-bearing derivative of 1, enables us to completely assign the NMR signals of the two conformers as 3a (67%, UUU) and3b (33%, UUD). A plausible biosynthesis mechanism of 1 was proposed.
作者:王勇 點擊:次