申请人:VANDERBILT UNIVERSITY
公开号:US20020098570A1
公开(公告)日:2002-07-25
The present invention provides a fatty acid lyase, wherein the activity of the lyase for 9-hydroperoxide substrates is greater than the activity for 13-hydroperoxide substrates and wherein K
m
and V
max
of the lyase for 9-hydroperoxylinolenic acid are greater than K
m
and V
max
of the lyase for 9-hydroperoxylinoleic acid. More particularly, the invention provides a lyase present in melon (
Cucumis melo
). The invention also provides a nucleic acid encoding the lyase, vectors, and expression systems with which the recombinant lyase can be obtained. The invention also provides methods of using the lyase of the invention, including methods of cleaving 9-hydroperoxylinoleic acid, 9-hydroperoxylinolenic acid, 13-hydroperoxylinoleic acid, and 13-hydroperoxylinolenic acid. Also, the invention provides a method of preparing 3-(Z)-nonenal, (3Z,6Z)-nonadienal, 2-(E)-nonenal, (2E,6Z)-nonadienal, or their corresponding alcohols and a method of preparing n-hexanal, 3-(Z)-hexen-
1
al, 2-(E)-hexen-
1
al, or their corresponding alcohols using the lyase of the present invention.
本发明提供了一种脂肪酸裂解酶,其中该裂解酶对 9-过氧化氢底物的活性大于对 13-过氧化氢底物的活性,且 K
m
和 V
最大值
大于 K
m
和 V
最大
大于 9-氢过氧化亚油酸裂解酶的 K m 和 V max。更具体地说,本发明提供了一种存在于甜瓜(Cucumis melo)中的裂解酶。
瓜类
).本发明还提供了一种编码该裂解酶的核酸、载体和表达系统,通过它们可以获得重组裂解酶。本发明还提供了使用本发明裂解酶的方法,包括裂解 9-hydroperoxylinoleic acid、9-hydroperoxylinolenic acid、13-hydroperoxylinoleic acid 和 13-hydroperoxylinolenic acid 的方法。此外,本发明还提供了一种制备 3-(Z)-壬烯醛、(3Z,6Z)-壬二烯醛、2-(E)-壬烯醛、(2E,6Z)-壬二烯醛或其相应醇类的方法,以及一种制备正己醛、3-(Z)-己烯- 1
1
al、2-(E)-己烯-1
1
或其相应醇类的方法。