CHEMICALLY SUBSTITUTED THERMOSENSITIVE PROBES AND COFACTORS FOR HOT START LIGATION
申请人:TRILINK BIOTECHNOLOGIES
公开号:US20140038181A1
公开(公告)日:2014-02-06
Provided herein are methods for ligase mediated nucleic acid replication and amplification of oligo- and probes containing substituted ligase components, particularly substituted ligase cofactors, substituted oligo- and probe acceptors, substituted oligo- and probe donors, substituted adenylated oligo- and polynucleotide donor intermediates carrying thermolabile group or groups. The substituted ligase components are not active until Hot Start activation step converts them into unsubstituted or natural ligase components, which fully support ligase reaction. The described methods are readily applied to ligation-based assays, especially utilizing Ligase Chain Reaction (LCR), for detection of a nucleic acid sequence where the use of the substituted ligase components improves an overall efficiency of LCR, increase discrimination between matched and mismatched templates and reduces or eliminates appearance of false positive signal. Furthermore, the use of the substituted ligase components reduces or eliminates the false positive signal originated from the template independent and blunt-ended ligation.
本文提供了一种利用连接酶介导的核酸复制和扩增方法,其中包含了含有取代连接酶组分(特别是取代连接酶辅因子、取代寡核苷酸接受体、取代寡核苷酸供体和携带热敏基团的取代腺苷化寡核苷酸供体中间体)的寡核苷酸和探针的扩增。这些取代连接酶组分在热启动激活步骤之前是不活跃的,直到转化为非取代或自然连接酶组分,才能完全支持连接反应。所述方法可轻松应用于基于连接的检测,特别是利用连接链反应(LCR)检测核酸序列,其中使用取代连接酶组分可提高LCR的整体效率,增加匹配和不匹配模板之间的区别,并减少或消除假阳性信号的出现。此外,使用取代连接酶组分可减少或消除由模板非依赖性和钝端连接引起的假阳性信号。