Bacillus subtilis HJX1, a biocontrol strain of Fusarium oxysporum f. sp. cubense, could inhibit growth of several plant pathogenic fungi in vitro. To un- derstand its mechanism of fungistasis, we extracted crude prote...Bacillus subtilis HJX1, a biocontrol strain of Fusarium oxysporum f. sp. cubense, could inhibit growth of several plant pathogenic fungi in vitro. To un- derstand its mechanism of fungistasis, we extracted crude protein from fermentation broth of the strain HJX1 through ammonium sulfate precipitation, and prelimina- rily studied fungistatic activities at different conditions. The results showed that the crude protein was insensitive to protease K, trypsin or ultraviolet radiation. The fungistatic activity was unchanged when treated in water batch at 40 ℃, 60 ℃, 80 ℃ or 100 ℃ for 30 min, and the fungistatic activity maintained 60% when trea- ted at 121℃ for 30 min.展开更多
基金Supported by the natural science foundation of Hainan Province in 2015(20158304)
文摘Bacillus subtilis HJX1, a biocontrol strain of Fusarium oxysporum f. sp. cubense, could inhibit growth of several plant pathogenic fungi in vitro. To un- derstand its mechanism of fungistasis, we extracted crude protein from fermentation broth of the strain HJX1 through ammonium sulfate precipitation, and prelimina- rily studied fungistatic activities at different conditions. The results showed that the crude protein was insensitive to protease K, trypsin or ultraviolet radiation. The fungistatic activity was unchanged when treated in water batch at 40 ℃, 60 ℃, 80 ℃ or 100 ℃ for 30 min, and the fungistatic activity maintained 60% when trea- ted at 121℃ for 30 min.
基金National Cancer Institute 5R01CA091792-085R01CA108461-05+2 种基金1R01CA137894-01 and 1R01CA138434-01A209National Institute of Allergy and Infectious Diseases 5R01AI067037-04National Institute of Dental and Craniofacial Research5R01DE017338-03(to ESR)
文摘目的:定位survivin基因启动子中参与卡波西肉瘤相关疱疹病毒(Kaposi’s sarcoma-associated herpesvirus,KSHV)复制转录激活因子(replication and transcription activator,RTA)上调survivin表达的重要元件。方法:构建survivin基因启动子的突变报告质粒,采用萤光素酶报告基因检测和染色质免疫共沉淀技术,定位survivin基因启动子区域能与RTA相互作用的顺式元件。结果:突变GC/Sp1和p53两个结合位点启动子活性几乎完全关闭,p53顺式作用元件对RTA上调survivin基因启动子活性具有协同作用。结论:KSHV RTA能够与survivin基因启动子中的GC/Sp1和p53顺式元件相互作用,特异性地增强survivin基因启动子活性。
