申请人:Commonwealth Scientific and Industrial Research Organisation
公开号:US20030143711A1
公开(公告)日:2003-07-31
The present invention provides an isolated DNA molecule encoding Malathion Carboxylesterase capable of hydrolysing at least one organophosphate selected from the group consisting of carboxylester organophosphates and dimethylol organophosphates. The DNA molecule comprises a nucleotide sequence having at least 60%, preferably at least 80% and more preferably at least 95% homology with Lc?E 7, in which the protein encoded by the DNA molecule differs from E 3 at least in the substitution of Trip at position 251 with an amino acid selected from the group consisting of Leu, Ser, Ala, Ile, Val, Thr, Cys, Met and Gly. The preferred substituents are Leu and Ser.
本发明提供了一种编码马拉硫磷羧基酯酶的分离DNA分子,该酶能够水解至少一种选自羧基酯类有机磷酸酯和二甲醇类有机磷酸酯的有机磷酸酯。DNA 分子包括一个核苷酸序列,该序列与 Lc?E 7 的同源性至少为 60%,优选至少为 80%,更优选至少为 95%,其中 DNA 分子编码的蛋白质与 E 3 的不同之处至少在于第 251 位的 Trip 被选自 Leu、Ser、Ala、Ile、Val、Thr、Cys、Met 和 Gly 组的氨基酸取代。优选的取代基为 Leu 和 Ser。