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首页> 外文期刊>The Journal of Antibiotics: An International Journal >Cloning of the gene cluster responsible for the biosynthesis of brasilicardin A, a unique diterpenoid.
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Cloning of the gene cluster responsible for the biosynthesis of brasilicardin A, a unique diterpenoid.

机译:克隆对糖尿病A的生物合成的基因簇,一种独特的二萜类化合物。

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摘要

Brasilicardin A (BCA), produced by Nocardia brasiliensis IFM 0406 (currently referred to as N. terpenica), has a unique structure consisting of a diterpene skeleton with L-rhamnose, N-acetylglucosamine, amino acid, and 3-hydroxybenzoate moieties, and exhibits potent biological activities. To understand the biosynthetic machinery of this unique compound, we have cloned the corresponding gene cluster. Firstly, we cloned a gene by PCR that encodes geranylgeranyl diphosphate synthase (GGPPS), which produces a direct precursor of diterpene compounds. We obtained four candidate genes and one of the genes was confirmed to encode a GGPPS. By sequence analysis of regions flanking the GGPPS gene, we identified eleven genes (bra1-11), all oriented in the same direction. We did not, however, detect any genes related to L-rhamnose and N-acetylglucosamine biosyntheses in the flanking regions. A gene disruption experiment did indeed show that this gene cluster was responsible for BCA biosynthesis.
机译:由Nocardia Brasiliensis IFM 0406生产的Brasilicardin A(BCA)(目前称为N.Terpenica),具有独特的结构,其与具有L-鼻窦,N-乙酰葡糖胺,氨基酸和3-羟基苯甲酸酯部分的二萜骨架组成, 展示有效的生物活动。 要了解这种独特的化合物的生物合成机器,我们已经克隆了相应的基因簇。 首先,我们通过PCR克隆了一种基因,所述PCR编码聚苯基甲基二磷酸二磷酸二磷酸合酶(GGPPS),其产生二萜化合物的直接前体。 我们获得了四种候选基因,并确认了其中一种基因以编码GGPP。 通过侧翼GGPPS基因的区域序列分析,我们鉴定了11个基因(BRA1-11),全部沿相同方向定向。 然而,我们没有检测到侧翼区域中与L-rhamnose和N-乙酰葡糖胺生物合成相关的任何基因。 基因破坏实验确实表明该基因群体对BCA生物合成负责。

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