Uracil-DNA glycosylase of psychrobacter sp. HJ147 and use thereof
    1.
    发明申请
    Uracil-DNA glycosylase of psychrobacter sp. HJ147 and use thereof 有权
    精神病菌的尿嘧啶-DNA糖基化酶 HJ147及其用途

    公开(公告)号:US20080299609A1

    公开(公告)日:2008-12-04

    申请号:US11823123

    申请日:2007-06-26

    摘要: The present invention provides uracil-DNA glycosylase (UDG) gene originating from Psychrobacter sp. HJ147, and amino acid sequences deduced from the gene; expression and purification of Psp HJ147 UDG gene in Escherichia coli; and characterization of UDG obtained therefrom, and the use thereof in a polymerase chain reaction (PCR). The UDG according to the present invention has a specific activity of excising uracil bases in a uracil-containing DNA substrates at a low temperature, and is easily heat-inactivated. It thus can effectively eliminate cross contamination and carry-over contamination of PCR templates often occurring after a PCR process using dUTP. Therefore, it is useful for increasing preciseness (elimination of false positives), purity and amplification efficiency of PCR.

    摘要翻译: 本发明提供源自Psychrobacter sp。的尿嘧啶-DNA糖基化酶(UDG)基因。 HJ147和从该基因推导出的氨基酸序列; 在大肠杆菌中表达和纯化Psp HJ147 UDG基因; 和由其获得的UDG的表征,以及其在聚合酶链式反应(PCR)中的用途。 根据本发明的UDG在低温下具有在含尿嘧啶DNA基质中的尿嘧啶碱基的比活性,并且容易热灭活。 因此,可以有效地消除在使用dUTP的PCR过程之后经常发生的PCR模板的交叉污染和携带污染。 因此,提高PCR的精确度(消除假阳性),纯度和扩增效率是有用的。