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Constitutive and Chloroplast Targeted Expression of Acetyl-CoA Carboxylase in Oleaginous Microalgae Elevates Fatty Acid Biosynthesis.
Li, Da-Wei; Xie, Wei-Hong; Hao, Ting-Bin; Cai, Jia-Xi; Zhou, Tian-Bao; Balamurugan, Srinivasan; Yang, Wei-Dong; Liu, Jie-Sheng; Li, Hong-Ye.
Afiliação
  • Li DW; Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institute, College of Life Science, Jinan University, Guangzhou, 510632, China.
  • Xie WH; Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institute, College of Life Science, Jinan University, Guangzhou, 510632, China.
  • Hao TB; School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, China.
  • Cai JX; Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institute, College of Life Science, Jinan University, Guangzhou, 510632, China.
  • Zhou TB; Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institute, College of Life Science, Jinan University, Guangzhou, 510632, China.
  • Balamurugan S; Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institute, College of Life Science, Jinan University, Guangzhou, 510632, China.
  • Yang WD; Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institute, College of Life Science, Jinan University, Guangzhou, 510632, China.
  • Liu JS; Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institute, College of Life Science, Jinan University, Guangzhou, 510632, China.
  • Li HY; Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institute, College of Life Science, Jinan University, Guangzhou, 510632, China.
Mar Biotechnol (NY) ; 20(5): 566-572, 2018 Oct.
Article em En | MEDLINE | ID: mdl-29931608
Photosynthetic microalgae are of burgeoning interest in the generation of commercial bioproducts. Microalgae accumulate high lipid content under adverse conditions, which in turn compromise their growth and hinder their commercial potential. Hence, it is necessary to engineer microalgae to mitigate elevated lipid accumulation and biomass. In this study, we identified acetyl-CoA carboxylase (ACCase) in oleaginous microalga Phaeodactylum tricornutum (PtACC2) and expressed constitutively in the chloroplast to demonstrate the potential of chloroplast engineering. Molecular characterization of transplastomic microalgae revealed that PtACC2 was integrated, transcribed and expressed successfully, and localized in the chloroplast. Enzymatic activity of ACCase was elevated by 3.3-fold, and the relative neutral lipid content increased substantially by 1.77-fold, and lipid content reached up to 40.8% of dry weight. Accordingly, the number and size of oil bodies markedly increased. Fatty acid profiling showed that the content of monounsaturated fatty acids increased, while polyunsaturated fatty acids decreased. This method provides a valuable genetic engineering toolbox for microalgal bioreactors with industrial significance.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Acetil-CoA Carboxilase / Ácidos Graxos Monoinsaturados / Cloroplastos / Diatomáceas / Ácidos Graxos Insaturados / Microalgas Idioma: En Ano de publicação: 2018 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Acetil-CoA Carboxilase / Ácidos Graxos Monoinsaturados / Cloroplastos / Diatomáceas / Ácidos Graxos Insaturados / Microalgas Idioma: En Ano de publicação: 2018 Tipo de documento: Article