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    • 3. 发明申请
    • NUCLEIC ACID SEQUENCE IDENTIFICATION
    • 核酸序列鉴定
    • WO2005019812A1
    • 2005-03-03
    • PCT/GB2004/003671
    • 2004-08-26
    • UNIVERSITY OF STRATHCLYDEGRAHAM, DuncanSMITH, William, EwenFRUK, Ljiljana
    • GRAHAM, DuncanSMITH, William, EwenFRUK, Ljiljana
    • G01N21/65
    • G01N21/658G01J3/44G01N2021/653
    • The invention provides modified molecular beacons detectable by surface enhanced Raman spectroscopy (SERS) and related materials, processes, and methods of use. Examples methods provide for the determination of the presence or absence of a target nucleotide sequence in a sample nucleic acid by (a) providing a detection agent, which agent comprises: (i) a probe comprising a target complement sequence (TCS) being complementary to the target sequence and flanking the TCS, first and second oligonucleotide arms, said first and second oligonucleotide arms forming a stem duplex, and said first arm incorporating a first label moiety being detectable by SERS (e.g. a fluoroscein dye) and said second arm terminating in a second label moiety being detectable by SERS, which second arm further includes a surface seeking group (SSG - e.g. an azo-benzotriazole) capable of promoting association of the second label onto an enhancing surface ii) associated with said probe via said SSG, an enhancing surface, such that said first and second label moieties are in close proximity to each other and to the enhancing surface (b) exposing the sample to the detection agent, (c) detecting hybridisation of the TCS to any target sequence present in the sample by a change in the SERS spectra of said agent.
    • 本发明提供通过表面增强拉曼光谱(SERS)和相关材料,方法和使用方法可检测的修饰分子信标。 实例方法通过(a)提供检测剂来确定样品核酸中靶核苷酸序列的存在或不存在,所述检测剂包括:(i)包含与SEQ ID NO:1的互补序列的靶互补序列(TCS)的探针 所述靶序列和所述TCS第一和第二寡核苷酸臂的侧翼,所述第一和第二寡核苷酸臂形成茎双相,并且所述第一臂结合第一标记部分,可被SERS(例如氟代染料染料)检测,所述第二臂终止于 第二标签部分可由SERS检测,该第二臂还包括能够促进第二标记与经由所述SSG与所述探针相关联的增强表面ii)的表面寻找组(SSG-例如偶氮 - 苯并三唑), 使得所述第一和第二标签部分彼此靠近并且与增强表面(b)将样品暴露于检测年龄 (c)通过所述试剂的SERS光谱的变化来检测TCS与样品中存在的任何靶序列的杂交。