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    • 4. 发明申请
    • HAFNIA PHYTASE VARIANTS
    • WO2010034835A3
    • 2010-06-24
    • PCT/EP2009062539
    • 2009-09-28
    • NOVOZYMES AS
    • LASSEN SOEREN FLENSTEDSKOV LARS KOBBEROEEDE MARIA LEONARDOFRIIS ESBEN PETERMATSUI TOMOKONOERGAARD ALLANVIND JESPER
    • C12N9/16A23K1/165
    • C12N9/16A23K20/189A23K50/30A23K50/75Y02E50/17
    • The present invention relates to phytases having at least 76% identity to a phytase derived from Hafnia alvei and comprises at least one modification in the amino acid sequence thereof. These phytase variants have modified, preferably improved, properties, such as, reduced protease sensitiliby, preferably they exhibit improved properties in respect of thermal performance, such as heat-stability (temperature stability, thermostability), steam stability, pelleting stability and/or temperature profile; and/or protease stability, in particular pepsin stability, pH profile, specific activity, substrate specificity, performance in animal feed(such as an improved release and/or degradation of phytate), susceptibility to glycation, and/or glycosylation pattern. The invention also relates to DNA encoding these phytases, methods of thei r production, as well as the use thereof, e.g. in animal feed and animal feed additives.
    • 本发明涉及与衍生自哈夫单胞菌属植物的植酸酶具有至少76%同一性的植酸酶,并且包含其氨基酸序列中的至少一个修饰。 这些植酸酶变体具有修饰的,优选改进的性质,例如降低的蛋白酶敏感性,优选它们在热性能方面具有改进的性能,例如热稳定性(温度稳定性,热稳定性),蒸汽稳定性,造粒稳定性和/或温度 简介; 和/或蛋白酶稳定性,特别是胃蛋白酶稳定性,pH曲线,比活性,底物特异性,动物饲料中的性能(如植酸盐的改善的释放和/或降解),对糖基化的敏感性和/或糖基化模式。 本发明还涉及编码这些植酸酶的DNA,其生产方法及其用途,例如, 在动物饲料和动物饲料添加剂中。