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    • 6. 发明公开
    • BROAD SPECTRUM OF STREPTOCOCCUS LYASE AND USE THEREOF
    • 广谱链球菌LYASE及其用途
    • EP3312275A1
    • 2018-04-25
    • EP16779579.8
    • 2016-04-12
    • Wuhan Phagelux Bio-Tech Company Limited
    • WEI, HongpingYANG, HangWANG, JingYU, Junping
    • C12N9/88C12N15/60A61K38/51A61P31/04A61P1/02
    • A61K38/51A61P31/04C12N9/88C12N15/101C12N15/70
    • This invention discloses a lysin that can kill many species of Streptococci. A new lysin, ClyR, was constructed by the gene splicing method. The ClyR can effectively kill different species of Streptococci, including Streptococcus pneumoniae, Streptococcus pyogenes, Streptococcus suis, Streptococcus uberis, Streptococcus agalactiae, Streptococcus dysgalactiae, Streptococcus mutans, Streptococcus equi, and various Enterococci and Staphylococcus aureus. ClyR shows good stability and is not sensitive to EDTA and high concentration of NaCl. Moreover, the ClyR is active in a wide range of pH and maintains high activity in pH 5-11. Recombinant protein ClyR is well expressed in E. coli stain BL21 (DE3). High doses of ClyR showed no apparent toxicity in mice. Furthermore, administration of 0.8 mg per mouse once is able to completely protect the mouse infected with lethal doses of Group B Streptococci. The ClyR can be used alone or in combination with different forms of reagents and solutions, for the control of a variety of Streptococci and for the treatment of infections caused by these bacteria. It has a broad application prospect.
    • 本发明公开了可杀死许多种链球菌的溶素。 通过基因剪接方法构建新的溶素ClyR。 ClyR可以有效地杀死不同种类的链球菌,包括肺炎链球菌,化脓链球菌,猪链球菌,乳房链球菌,无乳链球菌,停乳链球菌,变形链球菌,马链球菌,以及各种肠球菌和金黄色葡萄球菌。 ClyR表现出良好的稳定性,对EDTA和高浓度NaCl不敏感。 此外,ClyR在很宽的pH范围内具有活性,并在pH 5-11中保持高活性。 重组蛋白ClyR在大肠杆菌染色BL21(DE3)中很好地表达。 高剂量的ClyR显示在小鼠中没有明显的毒性。 此外,每只小鼠施用0.8mg能够完全保护用致死剂量的B组链球菌感染的小鼠。 ClyR可单独使用或与不同形式的试剂和溶液联合使用,用于控制各种链球菌以及治疗由这些细菌引起的感染。 具有广阔的应用前景。