Molecular cloning and characterization of a cDNA encoding cycloartenol synthase from Fritillaria thunbergii Miq.

Molecular cloning and characterization of a cDNA encoding cycloartenol synthase from Fritillaria thunbergii Miq.
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编码贝母环木菠萝烯醇合酶 cDNA 的分子克隆和表征。

DOI:
10.5897/ajb11.4041
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发表时间:
2012-03
期刊:
African Journal of Biotechnology Vol.
影响因子:
--
通讯作者:
万海同
万海同
中科院分区:
其他
文献类型:
--
作者:
朱振洪;刘文洪;葛立军;余勤;赵伟春;杨洁红;万海同

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浙贝母是贝母属的球茎植物,能产生大量的甾醇。根据已知的环阿糖醇合成酶(CAS)的保守序列设计简并的引物,通过基于同源性的聚合酶链式反应(PCRS),从黑麦草幼叶中克隆了一个CAS。环青蒿醇合成酶基因(FtCAS)由2271个碱基组成,编码756个氨基酸。推导的氨基酸序列与盾叶薯蓣中的环芳烯醇合酶有82%的同源性。FtCAS在巴斯德毕赤酵母中的异源表达导致了环阿糖醇的产生。我们的结果表明,FTCA S编码了环阿糖醇合成酶。
Fritillaria thunbergii Miq., known as the bulbous plants of the genus fritillaria , produces a large amount of sterols. Homology based polymerase chain reactions (PCRs) with degenerate primers designed from the conserved sequences among the known cycloartenol synthase (CAS) resulted in cloning of a CAS from the young leaves of F. thunbergii Miq . A putative cycloartenol synthase cDNA ( FtCAS ) consists of a 2271 bp open reading frame, which encodes for 756 amino acids. The deduced amino acid sequence shows 82% homology to cycloartenol synthases from Dioscorea zingiberensis . Heterologous expression of the FtCAS in the methylotrophic yeast, Pichia pastoris , resulted in production of cycloartenol. Our results indicate that FtCA S encode cycloartenol synthase.
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