Navarri Marion, Jégou Camille, Bondon Arnaud, Pottier Sandrine, Bach Stéphane, Baratte Blandine, Ruchaud Sandrine, Barbier Georges, Burgaud Gaëtan, Fleury Yannick
Université de Brest, EA 3882, Laboratoire Universitaire de Biodiversité et Ecologie Microbienne, IBSAM, 6 Rue de l'université, 29000 Quimper, France.
COrInt, UMR CNRS 6226 & Université de Rennes, 35043 Rennes, France.
Mar Drugs. 2017 Apr 7;15(4):111. doi: 10.3390/md15040111.
Four bioactive compounds have been isolated from the fungus UBOCC-A-114129 cultivated from deep subsurface sediment. They were structurally characterized using a combination of LC-MS/MS and NMR analyses as fuscin and its derivatives (dihydrofuscin, dihydrosecofuscin, and secofuscin) and identified as polyketides. Albeit those compounds were already obtained from terrestrial fungi, this is the first report of their production by an species and by the deepest subseafloor isolate ever studied for biological activities. We report a weak antibacterial activity of dihydrosecofuscin and secofuscin mainly directed against Gram-positive bacteria (Minimum Inhibitory Concentration (MIC) equal to Minimum Bactericidal Concentration (MBC), in the range of 100 μg/mL). The activity on various protein kinases was also analyzed and revealed a significant inhibition of CDC2-like kinase-1 (CLK1) by dihysecofuscin.
从深层地下沉积物中培养出的真菌UBOCC - A - 114129中分离出了四种生物活性化合物。通过液相色谱 - 串联质谱(LC - MS/MS)和核磁共振(NMR)分析相结合的方法,对它们的结构进行了表征,确定为褐菌素及其衍生物(二氢褐菌素、二氢去氢褐菌素和去氢褐菌素),并鉴定为聚酮化合物。尽管这些化合物已从陆生真菌中获得,但这是首次报道它们由某一物种以及有史以来研究过的最深海底下分离物产生并具有生物活性。我们报告了二氢去氢褐菌素和去氢褐菌素主要针对革兰氏阳性菌的微弱抗菌活性(最低抑菌浓度(MIC)等于最低杀菌浓度(MBC),范围为100μg/mL)。还分析了它们对各种蛋白激酶的活性,结果显示二氢去氢褐菌素对细胞周期蛋白依赖性激酶2样激酶 - 1(CLK1)有显著抑制作用。