欢迎来到天天文库
浏览记录
ID:5329174
大小:722.00 KB
页数:5页
时间:2017-12-08
《几个提高抑制消减杂交(ssh)文库质量的技术改进》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、万方数据2011年24卷5期VoL24No.5西南农卫学报Southm∞tChinaJournalofA面culturalSciences,1849文章编号:1001—4829(2011)05—1849—04几个提高抑审IJ消减杂交(SSH)文库质量的技术改进董登峰1’。,李杨瑞“,白云彩1(1.广西大学农学院,广西南宁530004;2.广西作物遗传改良生物技术重点实验室,广西南宁530007)摘要:抑制消减杂交(SSH)高灵敏、易操作、高效富集低表达丰度基因和均一化目的基因片断,广泛用干差异表达基因的分离和eD
2、NA文库构建。在实验操作中常出现低表达mRNA和eDNA丢失、大片断连接效率低等问题,构建的文库质量差,文章通过改进萃取操作提高目的产物(mRNA和eDNA)回收率,回收率增加30%以上;通过采用PvPP、高浓度KAc专一性结合和LICl沉淀等措施除去RNA中的多酚和多糖、进而增加可分离mRNA种类和含量,对应的Uni-EST种类增加近3倍,通过采用胶回收并分段连接保护大片断eDNA等措施使文库中转录本丰富度增加,大片段(500bp以上)比例增大,eDNA平均长度增大,文库质量明显提高。关键词:抑制消减杂交(SS
3、H);文库构建;技术改进中图分类号:S181文献标识码:AImprovementofSomeTechniquesforEnhancingQualityofSuppressionSubtractiveHybridizationcDNALibraryDONGDeng-fen91一,LIYang-rui2.,BAIYun-eail(1.CollegeofAgriculture,GuangxiUniversity,GuangxiNanning530004。China;2.Key—LabofCropGeneticImpro
4、vementandBiotechnolo-盯,GuangxiNanning530007,China)Abstract:SuppressionsubtracfivehybridizationwaswidelyusedtoisolatedifferentiallyexpressedgenesandconstructeDNAlibrariesatp阱entbecauseofitshi#sensitivity,easymanipulation,hi#efficiencyinenrichingmexpressedgenes
5、andnonnallzationoftargetedfrag-ments.Intheprocessofexperiment.theregularoccuiTencesoflossof矾expressedgenes(mRNAsandtheircorrespondingeDNAs)andlowefficiencyinligationb6/t-wb-*nlargeeDNAfragmentsandplasmidsusuallyresllltedinbadlibrary.Inthepresentedstudy,someim
6、provedtechniqueswereintroducedintoexperimentsandtheireffectsevaluated,including(i)deliberateextraction,whichincreasedtheyieldoftar-getfractionationsbyatle鹅t30%;(ii)removalofphenolsandpolysaccharidesfromRNAthroughspecificallyextractionwithpolyvinylpoly‘pyrroli
7、done(PVPP)andhighcqn.centrationofKAca8well舶precipitationwithLiCI,whichincreasedconcentrationandspeciesofmRNAs,andresultedinanear3foldincreaseofthecorrespondingUni-ESTs;(iii)purificationandfraetionationeDNAstlu-cughgelelectrophoresis,whichincreasedtheabundance
8、inmmscriptsandtheratiooflargeeDNAinserters(>500ho).Duetotheaboveme&lsui'cs,thequalityofconstructedSSHlibraryw∞imprevedobviously.Keywords:Suppressionsubtractivehybridization;Library;Improv
此文档下载收益归作者所有