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    • 46. 发明授权
    • Method for preparing 3'-nitrogen containing polynucleotides
    • 制备含3'-氮的多核苷酸的方法
    • US5625052A
    • 1997-04-29
    • US576206
    • 1995-12-21
    • Sam L. WooSteven Fung
    • Sam L. WooSteven Fung
    • C12N15/09C07C217/20C07C271/10C07C271/16C07C271/66C07C317/18C07C333/04C07H21/00C07H21/04C07H1/00
    • C07H21/00Y02P20/55
    • A method for synthesizing a polynucleotide having a nitrogen atom at the 3'-end is disclosed. The methods include the following steps. A solid support reagent is provided having the structure shown below: ##STR1## where T is an acid-cleavable hydroxyl protecting group, e.g., 4,4'-dimethoxytritil; Q is a linker connecting the nitrogen and oxygen, e.g., n-hexyl; R.sub.1 is a nitrogen substituent, e.g., hydrogen; R.sub.2 through R.sub.4 are separately hydrogen or lower alkyl; Y is an atom which is electronegative with respect to carbon, e.g., oxygen or sulfur; X.sub.1 is an atom which is electronegative with respect to carbon, e.g., sulfone; Z is a bond or spacer arm, e.g., ethylsuccinate; and W is a derivatized solid synthesis support capable of linking to Z, e.g., an amino-dirivitized controlled pore glass. The solid support is treated with acid to remove the acid-cleavable hydroxyl protecting group. A protected nucleoside monomer and a weak acid is added forming a linkage, and the unreacted sites on the solid support are capped. An oxidizing reagent is added and the above steps are repeated until polynucleotide chain elongation is complete. The polynucleotide is cleaved from the solid support and then deprotected.
    • 公开了一种在3'端合成具有氮原子的多核苷酸的方法。 方法包括以下步骤。 提供具有如下结构的固体支持剂:其中T是酸可裂解的羟基保护基团,例如4,4'-二甲氧基三苯乙酮; Q是连接氮和氧的接头,例如正己基; R1是氮取代基,例如氢; R2至R4分别为氢或低级烷基; Y是相对于碳例如氧或硫具有电负性的原子; X1是相对于碳电负性的原子,例如砜; Z是键或间隔臂,例如乙基琥珀酸盐; 并且W是能够与Z连接的衍生的固体合成载体,例如氨基 - 二硝基化的受控孔玻璃。 用酸处理固体支持物以除去酸可裂解的羟基保护基团。 加入保护的核苷单体和弱酸形成连接,并将固体载体上的未反应部位加封。 加入氧化试剂,并重复上述步骤,直到多核苷酸链延伸完成。 多核苷酸从固体支持物上切割,然后去保护。
    • 47. 发明授权
    • Enzymatic ligation of 3'amino-substituted oligonucleotides
    • 3'-氨基取代寡核苷酸的酶连接
    • US5593826A
    • 1997-01-14
    • US48975
    • 1993-04-16
    • Steven FungSergei M. Gryaznov
    • Steven FungSergei M. Gryaznov
    • C12Q1/68C07H21/04
    • C12Q1/6862
    • Method and kits are provided for detecting one or more target nucleic acids. A first oligonucleotide having a 3' amino group and a second oligonucleotide having a 5' phosphate group are annealed to a contiguous complementary region of a target nucleic acid. Whenever the 3' terminal nucleotides of the first oligonucleotide and the 5' nucleotides of the second oligonucleotide are complementary to the opposing nucleotides on the target nucleic acid, a nucleic acid ligase ligates the first and second oligonucleotides via the formation of a phosphoramidate linkage. The presence of the target nucleic acid is determined by detection of the ligated first and second oligonucleotides.
    • 提供了用于检测一种或多种靶核酸的方法和试剂盒。 具有3'氨基的第一寡核苷酸和具有5'磷酸基团的第二寡核苷酸与目标核酸的连续互补区退火。 每当第一寡核苷酸的3'末端核苷酸和第二寡核苷酸的5'核苷酸与靶核酸上的相对核苷酸互补时,核酸连接酶通过形成氨基磷酸酯连接物连接第一和第二寡核苷酸。 通过检测连接的第一和第二寡核苷酸来确定靶核酸的存在。