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时间:2018-08-03
《一株粘细菌myxococcusspstxz的分离鉴定及生物活性分析》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、一株粘细菌Myxococcussp.STXZ90的分离鉴定及生物活性分析关键字:细菌,分离,鉴定,生物,生物活性,分析一株粘细菌Myxococcussp.STXZ90的分离鉴定及生物活性分析本文为Word文档,感谢你的关注! DOI:10.7612/j.issn.10002537.2017.02.004 摘要采用灭活大肠杆菌诱导法分离粘细菌,通过形态观察、生理生化实验、16SrRNA基因序列同源性分析,对其进行鉴定并归类.并通过平板对峙法、肿瘤细胞毒性实验等检测粘细菌代谢产物的抑菌和抗肿瘤活性,RPHPL
2、C分离抗肿瘤活性物质.分离得到一株粘细菌,鉴定结果表明该菌株为黄色粘球菌,将其命名为Myxococcussp.STXZ90(简写为STXZ90).抑菌试验表明,STXZ90对多种人类病原菌及鱼类致病细菌如产气肠杆菌、嗜水气单胞菌等具有较高的抑制活性;STXZ90发酵上清的甲醇粗提物对多种肿瘤细胞具有广谱高效的抑制肿瘤细胞活性,对Hep3B,Hela和HUVEC等的最低半抑制浓度(IC50)为0.279~1.228mg/L.对该甲醇粗提物进行RPHPLC分离,得到2个较纯的单峰物质,体外肿瘤细胞实验结果显示该组
3、分有较强的抑制肿瘤细胞活性. 关键词粘细菌;次级代谢产物;高效液相色谱 Q939A10002537(2017)02002508 OnIsolation,IdentificationandBioactivitiyofMyxococcussp.STXZ90 HUANGTonglong,LEILianghuan,LIAOJiyan,ZHOUCai,WUYujing, LIChun,WEIHui,XIALiqiu,DINGXuezhi,ZHANGYouming* (StateKeyLaboratoryBr
4、eedingBaseofMicrobialMolecularBiology,CollegeofLifeScience,HunanNormalUniversity,Changsha410081,China) AbstractTheinactivatedEscherichia.colidependentfruitingbaitingtechniquewasusedtoisolatemyxobacterialstrains.Basedonthephylogeneticalcharacteristics,physi
5、ologicalandbiochemicalpropertiesand16SrRNAgenesequencehomologyanalysis,theisolatedstrainhasbeenidentifiedandclassified.TheinhabitationofthestraintodifferentpathogensandtumorcellsweredetectedbythePlateConfrontationCultureMethodandtumorcelltoxicityexperiment.
6、TheantitumorsubstancewasfurtherpurifiedbyRPHPLC.OurresultsshowedthatthestrainbelongedtomyxococcusxanthusandthusitwasnamedasMyxococcussp.STXZ90(STXZ90).TheantibacterialexperimentindicatedthatSTXZ90hadbacteriostaticactivitytodifferenthumanpathogensandfishpath
7、ogens,suchasEnterobacteraerogenes,andAeromonashydrophil.ThemethanolelutionofthefermentedsupernatantofSTXZ90exhibitedabroadspectrumandhigheffectonvarioustumorcelllines.TheIC50(halfmaximalinhibitoryconcentration)toHep3B,Hela,andHUVECwerebetween0.279to1.228mg/
8、L.ThemethanolelutionwasfurtherpurifiedbyRPHPLCwith2singlepeakfragmentsobtained,whichdisplayedstronginhibitoryactivitiestocancercells. KeywordsMyxobacteria;secondarymetabolite;HPLC 粘�菌(myxobacteria)是土
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