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    • 8. 发明授权
    • Polynucleotides encoding .alpha.2-3 neuraminidase
    • 编码α2-3神经氨酸酶的多核苷酸
    • US5591839A
    • 1997-01-07
    • US294477
    • 1994-08-18
    • Harvey I. MillerJohn C. KlockChristopher M. Starr
    • Harvey I. MillerJohn C. KlockChristopher M. Starr
    • C12N9/24C07H21/02C07H21/04
    • C12Y302/01018C12N9/2402
    • Polynucleotide sequences encoding enzymes that possess .alpha.2-3 neuraminidase activity are provided. Of particular interest are polynucleotide sequences encoding an enzyme having .alpha.2-3 neuraminidase activity and naturally produced by the bacteria Streptococcus pneumoniae. Recombinant DNA expression of enzymes possessing .alpha.2-3 specific neuraminidase activity is also described, including methods, recombinant host cells and a genetic construction. The invention also provides a purified enzyme having .alpha.2-3 neuraminidase activity from Streptococcus pneumoniae, wherein the enzyme is isolated from S. pneumoniea cultures. Another aspect of this invention is to provide methods of isolating genes encoding enzymes having neuraminidase activity, particularly .alpha.2-3 neuraminidase activity. The gene isolation methods of the invention comprise the step of labeling a hybridization probe derived from the neuraminidase coding portion of plasmid pND-1. The hybridization probe may then be used to isolate homologous genes encoding enzymes having the desired enzymatic activity.
    • 提供了编码具有α2-3神经氨酸酶活性的酶的多核苷酸序列。 特别感兴趣的是编码具有α2-3神经氨酸酶活性并由细菌肺炎链球菌天然产生的酶的多核苷酸序列。 还描述了具有α2-3特异性神经氨酸酶活性的酶的重组DNA表达,包括方法,重组宿主细胞和遗传构建。 本发明还提供了具有来自肺炎链球菌的α2-3神经氨酸酶活性的纯化酶,其中所述酶从肺炎链球菌培养物中分离。 本发明的另一方面是提供分离编码具有神经氨酸酶活性的酶的基因,特别是α2-3神经氨酸酶活性的方法。 本发明的基因分离方法包括标记衍生自质粒pND-1的神经氨酸酶编码部分的杂交探针的步骤。 然后可以使用杂交探针来分离编码具有所需酶活性的酶的同源基因。