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    • 85. 发明公开
    • PROBES FOR DETECTING TARGET NUCLEIC ACID, METHOD OF DETECTING TARGET NUCLEIC ACID, AND SOLID PHASE FOR DETECTING TARGET NUCLEIC ACID AND PROCESS FOR PRODUCING THE SAME
    • 探针 - 靶核酸的测定,测定方法的靶核酸,固相的靶核酸和制造方法的测定
    • EP1016731A1
    • 2000-07-05
    • EP99900152.2
    • 1999-01-08
    • Laboratory of Molecular Biophotonics
    • ABE, Satoshi, Laboratory of Molecular BiophotonicsKODAMA, Hirofumi
    • C12Q1/68
    • C12Q1/6862C12Q1/6823C12Q1/6834C12Q2565/543C12Q2521/501C12Q2523/107C12Q2521/101
    • This invention relates to a pair of probes for the detection of a target nucleic acid, said pair of probes comprising (1) probe 1 having base sequence B1 complementary to A1 between two specific sequential base sequences A1 and A2 of the nucleic acid, wherein (a) the 5'-terminus of base sequence B1 is phosphorylated and (b) a first solid phase immobilizing part is bound to the 3'-terminus of base sequence B1, and (2) probe 2 having base sequence B2 complementary to A2 between base sequences A1 and A2, wherein (a) the 5'-terminus of base sequence B2 is bound to one end of a cleavage part and (b) a second solid phase immobilizing part is bound to the other part of the cleavage part. When the target nucleic acid is hybridized above the solid phase of the invention where said probes are immobilized on its surface, the probes on the solid phase occupy spatial positions beneficial to the formation of a hybrid and thus forms the hybrid efficiently. Therefore, probe 1 and probe 2 are efficiently ligated by ligase reaction. Furthermore, after the target nucleic acid is removed from the hybrid, only probe 2 ligated as described above will be able to exist on the solid phase through cleavage reaction of the cleavage part. Therefore, after the free probe 2 has been removed by washing, it will become possible to detect the presence of probe 2 on the solid phase ligated as described above, with high sensitivity and high recognition. This will enable detection of the presence of a target nucleic acid with higher sensitivity and higher recognition as compared to methods in the prior art.
    • 本发明涉及到一对探针的用于检测靶核酸的,所述一对探针,其包括核酸,worin的两个特定顺序的碱基序列A1和A2之间的(1)探针具有1碱基序列A1互补B1的( 一个)的碱基序列B1的5'末端被磷酸化和(b)第一固相固定部分结合到碱基序列B1的3'末端,和(2)样品2具有碱基序列B2互补A2之间 碱基序列A1和A2,worin的(a)碱基序列B2的5“末端结合到切割部分的一端和(b)第二固相固定部分结合到切割部分的另一部分。 当靶核酸,其中所述探针在其表面上固定化本发明的固相以上的杂交,在固相上探针占据的杂交体的形成有利的空间位置,从而有效地形成混合。 因此,探针1和探针2被有效地通过连接酶反应连接。 进一步,在靶后核酸从混合去除,只有两个测试连接如上所述将能够通过切割部分的切割反应在固相存在。 因此,免费试用2已经通过洗涤除去后,将成为能够检测上如上述那样,具有高灵敏度和高识别连接在固相样品2的存在。 这将使一个靶核酸与更高的灵敏度和更高的识别的存在的检测相比,在现有技术中的方法。