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    • 1. 发明申请
    • PROTEIN
    • 蛋白
    • WO2010150213A1
    • 2010-12-29
    • PCT/IB2010/052868
    • 2010-06-23
    • DANISCO A/SMIASNIKOV, AndreiBOTT, Richard, RSØRENSEN, Jens, Frisbæk
    • MIASNIKOV, AndreiBOTT, Richard, RSØRENSEN, Jens, Frisbæk
    • C12N9/18C12N9/20A23L1/015C12N15/55
    • C12N9/20A21D8/042C12N9/18C12Y301/01003C12Y301/01004C12Y301/01026C12Y301/01032
    • The present invention relates to a method for preparing a variant lipolytic enzyme comprising expressing in a host organism a nucleotide sequence which has at least 90% identity with a nucleotide sequence encoding a fungal lipolytic enzyme and comprises at at least one modification at a position which corresponds in the encoded amino acid sequence to a) the introduction of at least one glycosylation site (or one additional glycosylation site) in the amino acid sequence compared with the original fungal lipolytic enzyme; b) the introduction of at least one amino acid at a surface position on the polypeptide and at a location in an external loop distal to the active site (catalytic triad) of the enzyme which is more hydrophilic (compared with the original amino acid); or c) a substitution or insertion at one or more of positions 33, 63, 78, 190, 305, 306 or 320 or a deletion at one or more positions 311-312 or 307-319, wherein each amino acid position corresponds to the position of the amino acid sequence when aligned with SEQ ID No. 2; wherein when the nucleotide sequence has at least 90% identity with a nucleotide sequence encoding the fungal lipolytic enzyme shown in SEQ ID No. 22 or SEQ ID No. 23 the modification is not a substitution at position 63 and the deletion is not at position 311 -312. Preferably the nucleotide sequence has at least 90% identity with SEQ ID No. 1. The invention also relates to polypeptide produced by the method and to novel nucleic acids.
    • 本发明涉及一种制备变体脂肪分解酶的方法,其包括在宿主生物体中表达与编码真菌脂肪分解酶的核苷酸序列具有至少90%同一性的核苷酸序列,并且包括在对应的位置处的至少一个修饰 在编码的氨基酸序列中a)与原始真菌脂肪分解酶相比,在氨基酸序列中引入至少一个糖基化位点(或另外一个糖基化位点); b)在多肽的表面位置和远离更亲水的酶(与原始氨基酸相比)的活性位点(催化三单元组)的外部环路的位置处引入至少一个氨基酸; 或c)在位置33,63,78,190,305,306或320中的一个或多个处的取代或插入或在一个或多个位置311-312或307-319处的缺失,其中每个氨基酸位置对应于 当与SEQ ID No.2对齐时,氨基酸序列的位置; 其中当所述核苷酸序列与编码SEQ ID No.22或SEQ ID No.23所示的真菌脂肪分解酶的核苷酸序列具有至少90%同一性时,所述修饰不是位置63处的取代,并且缺失不在位置311 -312。 优选地,核苷酸序列与SEQ ID No.1具有至少90%的同一性。本发明还涉及通过该方法产生的多肽和新的核酸。