申请人:THE PUBLIC HEALTH RESEARCH INSTITUTE
OF THE CITY OF NEW YORK, INC.
公开号:EP0745690A2
公开(公告)日:1996-12-04
Unimolecular and bimolecular hybridization probes for the detection of nucleic acid target sequences comprise a target complement sequence, an affinity pair holding the probe in a closed conformation in the absence of target sequence, and either a label pair that interacts when the probe is in the closed conformation or, for certain unimolecular probes, a non-interactive label. Hybridization of the target and target complement sequences shifts the probe to an open conformation. The shift is detectable due to reduced interaction of the label pair or by detecting a signal from a non-interactive label. Certain unimolecular probes can discriminate between target and non-target sequences differing by as little as one nucleotide. Also, universal stems and kits useful for constructing said probes. Also, assays utilizing said probes and kits for performing such assays. Also, such probes capable of allelic discrimination.
用于检测核酸目标序列的单分子和双分子杂交探针包括目标互补序列、在没有目标序列的情况下保持探针封闭构象的亲和对、以及当探针处于封闭构象时发生相互作用的标签对,或者对于某些单分子探针来说,非互作性标签。目标序列和目标互补序列的杂交会使探针转变为开放构象。由于标签对的相互作用减弱,或通过检测非互作标签的信号,可检测到这种转变。某些单分子探针可以区分差异仅为一个核苷酸的目标和非目标序列。此外,还有用于构建所述探针的通用茎和试剂盒。还有,利用所述探针和试剂盒进行的测定。还有,能够区分等位基因的探针。