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公开(公告)号:EP3064581A4
公开(公告)日:2017-03-29
申请号:EP14850029
申请日:2014-09-26
申请人: AMANO ENZYME INC
IPC分类号: C12N15/09 , C12N1/15 , C12N1/19 , C12N1/21 , C12N5/10 , C12N9/38 , C12P19/04 , C12P19/12 , C12P19/14
CPC分类号: C12P19/14 , C12N9/2471 , C12P19/04 , C12P19/12 , C12Y302/01023
摘要: The usefulness of ² -galactosidases derived from Bacillus circulans is further enhanced so that they can be applied to new applications. The present invention provides a modified ² -galactosidase in which one or more amino acids selected from the group consisting of proline at position 182 (P182), tyrosine at position 187 (Y187), serine at position 188 (S188), tryptophan at position 405 (W405), alanine at position 406 (A406), glutamine at position 407 (Q407), tyrosine at position 449 (Y449), threonine at position 483 (T483), serine at position 512 (S512), serine at position 531 (S531), serine at position 533 (S533), serine at position 534 (S534), asparagine at position 550 (N550), glutamine at position 551 (Q551), tryptophan at position 593 (W593), tyrosine at position 598 (Y598), proline at position 602 (P602), proline at position 604 (P604), tyrosine at position 609 (Y609), lysine at position 612 (K612), and tyrosine at position 615 (Y615), or an amino acid(s) corresponding thereto, has/have been substituted by other amino acid in a ² -galactosidase consisting of the amino acid sequence of any of SEQ ID NOs. 1 to 4 or an amino acid sequence having 90% or more identity to the amino acid sequence set forth in any of SEQ ID NOs. 1 to 4.
摘要翻译: 衍生自环状芽孢杆菌的β-半乳糖苷酶的有用性进一步增强,从而可以将其应用于新的应用。 本发明提供了一种修饰的β-半乳糖苷酶,其中一个或多个氨基酸选自182位的脯氨酸(P182),187位的酪氨酸(Y187),第188位的丝氨酸(S188),405位的色氨酸 (W405),406位丙氨酸(A406),407位谷氨酰胺(Q407),449位酪氨酸(Y449),第483位苏氨酸(T483),512位丝氨酸(S512),531位丝氨酸 ),533位的丝氨酸(S533),534位的丝氨酸(S534),550位的天冬酰胺(N550),551位的谷氨酰胺(595),593位的色氨酸(W593),598位的酪氨酸(Y598) 位置602(P602)的脯氨酸,604位的脯氨酸(P604),609位的酪氨酸(Y609),612位的赖氨酸(K612)和615位的酪氨酸(Y615)或与之对应的氨基酸 在由SEQ ID NO中任一个的氨基酸序列组成的β-半乳糖苷酶中已被其它氨基酸取代。 1至4或与SEQ ID NO中任一个所示氨基酸序列具有90%或更高同一性的氨基酸序列。 1到4。