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    • 1. 发明公开
    • PROTEIN
    • 蛋白质
    • EP2446027A1
    • 2012-05-02
    • EP10730253.1
    • 2010-06-23
    • Danisco A/S
    • 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.
    • 7. 发明公开
    • Enzymatic oil-degumming method
    • 酶促油脱胶法
    • EP2275522A3
    • 2011-09-21
    • EP10175653.4
    • 2005-07-18
    • Danisco A/S
    • Miasnikov, AndreiSoe, JørnMikkelsen, JørnPovelainen, MiraPitkanen, Virve
    • C11B3/00C11C3/00C07F9/10A23J7/00C12N9/20C12P7/64A21D8/04
    • C12N9/1029A21D8/042A23J7/00C11B3/003C12N9/20C12P7/6418C12P7/6445C12P7/6481C12Y301/01003
    • The invention also encompasses the use of a lipolytic enzyme obtainable from one of the following genera: Streptomyces, Corynebacterium and Thermobifida in various methods and uses, wherein said lipolytic enzyme is capable of hydrolysing a glycolipid or a phospholipid or transferring an acyl group from a glycolipid or phospholipids to a acyl acceptor. Preferably, the lipolytic enzyme for use in these methods and uses comprises an amino acid sequence as shown in any one of SEQ. ID. No.s 4, 5, 7, 8, 12, 14 or 16 or an amino acid sequence having at least 70% identity therewith or comprises a nucleotide sequence shown as SEQ ID No. 3, 6, 9, 13, 15 or 17 or a nulceotide seqeunce which has at least 70% identity therewith. The present invention also relates to a lipolytic enzyme capable of hydrolysing at least a galactolipid or capable of transferring an acyl group from a galactolipid to one or more acyl acceptor substrates, wherein the enzyme is obtainable from Steptomyces species and includes a lipolytic enzyme comprising an amino acid sequence as shown in SEQ ID No. 4 or an amino acid sequence which has at least 60% identity thereto. The enzyme may be encoded by a nucleic acid selected from the group consisting of:
      a nucleic acid comprising a nucleotide sequence shown in SEQ ID No. 3;
      a nucleic acid which is related to the nucleotide sequence of SEQ ID No. 3 by the degeneration of the genetic code; and
      a nucleic acid comprising a nucleotide sequence which has at least 70% identity with the nucleotide sequence shown in SEQ ID No. 3.
    • 本发明还包括在各种方法和用途中可使用从下列属之一获得的脂解酶:链霉菌属,棒状杆菌属和嗜热菌属,其中所述脂解酶能够水解糖脂或磷脂或从糖脂转移酰基 或磷脂酰基受体。 优选地,用于这些方法和用途的脂解酶包含如SEQ.ID.NO.1中任一所示的氨基酸序列。 ID。 编号为4,5,7,8,12,14或16的氨基酸序列或与其具有至少70%同一性的氨基酸序列,或者包含如SEQ ID No.3,6,9,13,15或17所示的核苷酸序列 或与其具有至少70%同一性的核苷酸序列。 本发明还涉及能够水解至少半乳糖脂或能够将酰基从半乳糖脂转移到一个或多个酰基受体底物的脂肪分解酶,其中所述酶可以从链霉菌种获得并且包括含有氨基酸的脂解酶 如SEQ ID No.4所示的氨基酸序列或与其具有至少60%同一性的氨基酸序列。 该酶可由选自以下的核酸编码:包含SEQ ID No.3所示核苷酸序列的核酸; 通过遗传密码的变性与核苷酸序列SEQ ID No.3相关的核酸; 和包含与SEQ ID No.3中所示的核苷酸序列具有至少70%同一性的核苷酸序列的核酸。