Expression and knockdown of the PEPC1 gene affect carbon flux in the biosynthesis of triacylglycerols by the green alga Chlamydomonas reinhardtii

文献类型： 外文期刊

第一作者： Deng, Xiaodong

作者： Deng, Xiaodong;Cai, Jiajia;Li, Yajun;Fei, Xiaowen

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期刊名称：BIOTECHNOLOGY LETTERS （ 影响因子：2.461； 五年影响因子：2.457 ）

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收录情况： SCI

摘要： The regulation of lipid biosynthesis is important in photosynthetic eukaryotic cells. This regulation is facilitated by the direct synthesis of fatty acids and triacylglycerol (TAG), and by other controls of the main carbon metabolic pathway. In this study, knockdown of the mRNA expression of the Chlamydomonas phosphoenolpyruvate carboxylase isoform 1 (CrPEPC1) gene by RNA interference increased TAG level by 20 % but decreased PEPC activities in the corresponding transgenic algae by 39-50 %. The decrease in CrPEPC1 expression increased the expression of TAG biosynthesis-related genes, such as acyl-CoA:diacylglycerol acyltransferase and phosphatidate phosphatase. Conversely, CrPEPC1 over-expression decreased TAG level by 37 % and increased PEPC activities by 157-184 %. These observations suggest that the lipid content of algal cells can be controlled by regulating the CrPEPC1 gene

分类号： Q7

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