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Zeng J, Wang X, Miao Y, Wang C, Zang M, Chen X, Li M, Li X, Wang Q, Li K, Chang J, Wang Y, Yang G, He G. Metabolic Engineering of Wheat Provitamin A by Simultaneously Overexpressing CrtB and Silencing Carotenoid Hydroxylase (TaHYD). J Agric Food Chem 2015; 63:9083-92. [PMID: 26424551 DOI: 10.1021/acs.jafc.5b04279] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Increasing the provitamin A content in staple crops via carotenoid metabolic engineering is one way to address vitamin A deficiency. In this work a combination of methods was applied to specifically increase β-carotene content in wheat by metabolic engineering. Endosperm-specific silencing of the carotenoid hydroxylase gene (TaHYD) increased β-carotene content 10.5-fold to 1.76 μg g(-1) in wheat endosperm. Overexpression of CrtB introduced an additional flux into wheat, accompanied by a β-carotene increase of 14.6-fold to 2.45 μg g(-1). When the "push strategy" (overexpressing CrtB) and "block strategy" (silencing TaHYD) were combined in wheat metabolic engineering, significant levels of β-carotene accumulation were obtained, corresponding to an increase of up to 31-fold to 5.06 μg g(-1). This is the first example of successful metabolic engineering to specifically improve β-carotene content in wheat endosperm through a combination of methods and demonstrates the potential of genetic engineering for specific nutritional enhancement of wheat.
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Affiliation(s)
- Jian Zeng
- The Genetic Engineering International Cooperation Base of the Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of the Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Xiatian Wang
- The Genetic Engineering International Cooperation Base of the Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of the Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Yingjie Miao
- The Genetic Engineering International Cooperation Base of the Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of the Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Cheng Wang
- The Genetic Engineering International Cooperation Base of the Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of the Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Mingli Zang
- The Genetic Engineering International Cooperation Base of the Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of the Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Xi Chen
- The Genetic Engineering International Cooperation Base of the Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of the Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Miao Li
- The Genetic Engineering International Cooperation Base of the Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of the Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Xiaoyan Li
- The Genetic Engineering International Cooperation Base of the Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of the Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Qiong Wang
- The Genetic Engineering International Cooperation Base of the Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of the Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Kexiu Li
- The Genetic Engineering International Cooperation Base of the Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of the Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Junli Chang
- The Genetic Engineering International Cooperation Base of the Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of the Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Yuesheng Wang
- The Genetic Engineering International Cooperation Base of the Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of the Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Guangxiao Yang
- The Genetic Engineering International Cooperation Base of the Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of the Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Guangyuan He
- The Genetic Engineering International Cooperation Base of the Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of the Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology , Wuhan 430074, China
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Furubayashi M, Li L, Katabami A, Saito K, Umeno D. Construction of carotenoid biosynthetic pathways using squalene synthase. FEBS Lett 2013; 588:436-42. [PMID: 24333579 DOI: 10.1016/j.febslet.2013.12.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2013] [Revised: 11/28/2013] [Accepted: 12/03/2013] [Indexed: 10/25/2022]
Abstract
The first committed steps of steroid/hopanoid pathways involve squalene synthase (SQS). Here, we report the Escherichia coli production of diaponeurosporene and diapolycopene, yellow C30 carotenoid pigments, by expressing human SQS and Staphylococcus aureus dehydrosqualene (C30 carotenoid) desaturase (CrtN). We suggest that the carotenoid pigments are synthesized mainly via the desaturation of squalene rather than the direct synthesis of dehydrosqualene through the non-reductive condensation of prenyl diphosphate precursors, indicating the possible existence of a "squalene route" and a "lycopersene route" for C30 and C40 carotenoids, respectively. Additionally, this finding yields a new method of colorimetric screening for the cellular activity of squalene synthases, which are major targets for cholesterol-lowering drugs.
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Affiliation(s)
- Maiko Furubayashi
- Department of Applied Chemistry and Biotechnology, Chiba University, 1-33, Yayoi-cho, Inage, Chiba 263-8522, Japan
| | - Ling Li
- Department of Applied Chemistry and Biotechnology, Chiba University, 1-33, Yayoi-cho, Inage, Chiba 263-8522, Japan
| | - Akinori Katabami
- Department of Applied Chemistry and Biotechnology, Chiba University, 1-33, Yayoi-cho, Inage, Chiba 263-8522, Japan
| | - Kyoichi Saito
- Department of Applied Chemistry and Biotechnology, Chiba University, 1-33, Yayoi-cho, Inage, Chiba 263-8522, Japan
| | - Daisuke Umeno
- Department of Applied Chemistry and Biotechnology, Chiba University, 1-33, Yayoi-cho, Inage, Chiba 263-8522, Japan; Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan.
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