5' to 3' exonuclease mutations of thermostable DNA polymerases
    1.
    发明授权
    5' to 3' exonuclease mutations of thermostable DNA polymerases 失效
    热稳定DNA聚合酶的5'至3'核酸外切酶突变

    公开(公告)号:US5795762A

    公开(公告)日:1998-08-18

    申请号:US458819

    申请日:1995-06-02

    IPC分类号: C12N9/12

    CPC分类号: C12N9/1252

    摘要: The present invention relates to thermostable DNA polymerases which exhibit a different level of 5' to 3' exonuclease activity than their respective native polymerases. Particular conserved amino acid domains in thermostable DNA polymerases are mutated or deleted to alter the 5' to 3' exonuclease activity of the polymerases. The present invention also relates to means for isolating and producing such altered polymerases.

    摘要翻译: 本发明涉及耐热性DNA聚合酶,其表现出与其各自的天然聚合酶不同的5'至3'核酸外切酶活性水平。 热稳定DNA聚合酶中特定的保守氨基酸结构域突变或缺失,以改变聚合酶的5'至3'核酸外切酶活性。 本发明还涉及用于分离和产生这种改变的聚合酶的方法。

    Stabilized thermostable nucleic acid polymerase compositions containing
non-ionic polymeric detergents
    8.
    发明授权
    Stabilized thermostable nucleic acid polymerase compositions containing non-ionic polymeric detergents 失效
    含有非离子聚合物洗涤剂的稳定的耐热核酸聚合酶组合物

    公开(公告)号:US6127155A

    公开(公告)日:2000-10-03

    申请号:US873897

    申请日:1992-04-24

    摘要: A purified thermostable nucleic acid polymerase is obtained that has unique characteristics. Preferably the nucleic acid polymerase is DNA polymerase isolated from a Thermus aquaticus species and has a molecular weight of about 86,000-95,000 daltons. The thermostable nucleic acid polymerase may be native or recombinant and may be used in a temperature-cycling chain reaction wherein at least one nucleic acid sequence is amplified in quantity from an existing sequence with the aid of selected primers and nucleotide triphosphates. The nucleic acid polymerase is preferably stored in a buffer containing non-ionic detergents that lends stability to the nucleic acid polymerase. A preferred buffer contains glycerol, polyoxyethylated sorbitan monolaurate, ethoxylated nonyl phenol and gelatin.

    摘要翻译: 获得了具有独特特征的纯化的热稳定性核酸聚合酶。 优选地,所述核酸聚合酶是从栖热栖热菌属物种分离的DNA聚合酶,其分子量约为86,000-95,000道尔顿。 热稳定性核酸聚合酶可以是天然的或重组的,并且可以用于温度循环链式反应,其中借助于选定的引物和三磷酸核苷酸,从现存的序列中扩增至少一个核酸序列。 核酸聚合酶优选储存在含有使核酸聚合酶具有稳定性的非离子型清净剂的缓冲液中。 优选的缓冲液含有甘油,聚氧乙基化脱水山梨糖醇单月桂酸酯,乙氧基化壬基苯酚和明胶。