Three bioactive cyclic dipeptides from the Bacillus sp. N strain associated with entomopathogenic nematode
作者:Sasidharan Kumar Nishanth、Bala Nambisan、C. Dileep
DOI:10.1016/j.peptides.2013.11.017
日期:2014.3
our search for new bioactive secondary metabolites from Bacillus cereus associated with entomopathogenic nematode (EPN), three cyclic dipeptides (CDPs), cyclo(L-Leu-D-Arg) (1), cyclo(2-hydroxy-Pro-L-Leu) (2), and cyclo(L-Val-L-Pro) (3) were purified from the ethyl acetate extract of B. cereus. The chemical structure of the compounds was identified by 1D, 2D NMR and HR-ESI-MS. Cyclo(L-Leu-D-Arg) recorded
在我们继续寻找蜡状芽孢杆菌与昆虫病原线虫(EPN)相关的新的生物活性次级代谢产物时,三个环二肽(CDP),环(L-Leu-D-Arg)(1),环(2-羟基-Pro-从蜡状芽孢杆菌的乙酸乙酯提取物中纯化L-Leu)(2)和环(L-Val-L-Pro)(3)。化合物的化学结构通过1D,2D NMR和HR-ESI-MS鉴定。Cyclo(L-Leu-D-Arg)表现出最佳的抗真菌活性,对新隐球菌(1杯/ mL)的抗真菌活性最高,比标准的抗真菌剂两性霉素B. MTT(3-(4,5- (二甲基噻唑-2-基)-2,5-二苯基溴化四溴化铵)分析法被用于发现细胞增殖抑制作用,而环(L-Leu-D-Arg)记录了对乳腺癌细胞系(MDAM-B231)的显着活性(IC50值:除了环(L-Val-L-Pro)以外,最多50μM的抗人正常细胞(在皮肤(FS)正常成纤维细胞之前)和25个环二肽都没有记录到对正常人细胞的