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题名: Producing Designer Oils in Industrial Microalgae by Rational Modulation of Co-evolving Type-2 Diacylglycerol Acyltransferases
作者: Xin, Yi1, 2, 10; Lu, Yandu1, 2, 10; Lee, Yi-Ying3, 4; Wei, Li1, 2, 10; Jia, Jing1, 2, 10; Wang, Qintao1, 2, 10; Wang, Dongmei1, 2, 10; Bai, Fali9, 10; Hu, Hanhua8, 10; Hu, Qiang7, 10; Liu, Jin3, 4, 5, 6; Li, Yantao3, 4; Xu, Jian1, 2, 10
关键词: biofuels ; degree of unsaturation ; genetic engineering ; diacylglycerol acyltransferase ; Nannochloropsis
刊名: MOLECULAR PLANT
发表日期: 2017-12-04
DOI: 10.1016/j.molp.2017.10.011
卷: 10, 期:12, 页:1523-1539
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Biochemistry & Molecular Biology ; Plant Sciences
研究领域[WOS]: Biochemistry & Molecular Biology ; Plant Sciences
英文摘要: Microalgal oils, depending on their degree of unsaturation, can be utilized as either nutritional supplements or fuels; thus, a feedstock with genetically designed and tunable degree of unsaturation is desirable to maximize process efficiency and product versatility. Systematic profiling of ex vivo (in yeast), in vitro, and in vivo activities of type-2 diacylglycerol acyltransferases in Nannochloropsis oceanica (NoDGAT2s or NoDGTTs), via reverse genetics, revealed that NoDGAT2A prefers saturated fatty acids (SFAs), NoDGAT2D prefers monounsaturated fatty acids (MUFAs), and NoDGAT2C exhibits the strongest activity toward polyunsaturated fatty acids (PUFAs). As NoDGAT2A, 2C, and 2D originated from the green alga, red alga, and eukaryotic host ancestral participants of secondary endosymbiosis, respectively, a mechanistic model of oleaginousness was unveiled, in which the indigenous and adopted NoDGAT2s formulated functional complementarity and specific transcript abundance ratio that underlie a rigid SFA: MUFA:PUFA hierarchy in triacylglycerol (TAG). By rationally modulating the ratio of NoDGAT2A:2C:2D transcripts, a bank of N. oceanica strains optimized for nutritional supplement or fuel production with a wide range of degree of unsaturation were created, in which proportion of SFAs, MUFAs, and PUFAs in TAG varied by 1.3-, 3.7-, and 11.2-fold, respectively. This established a novel strategy to simultaneously improve productivity and quality of oils from industrial microalgae.
关键词[WOS]: FATTY-ACID-COMPOSITION ; NANNOCHLOROPSIS-OCEANICA ; TRIACYLGLYCEROL BIOSYNTHESIS ; OLEAGINOUS MICROALGA ; EICOSAPENTAENOIC ACID ; ENDOPLASMIC-RETICULUM ; SYNTHETIC BIOLOGY ; GENE ; IDENTIFICATION ; CHLAMYDOMONAS
语种: 英语
项目资助者: Natural Science Foundation of China(31425002 ; Chinese Academy of Sciences(KSZD-EW-Z-017 ; Natural Science Foundation of Shandong(ZR2015CQ003) ; U.S. National Science Foundation(CBET-1511939) ; U.S. Office of Naval Research(N00014-15-1-2219) ; 31600059 ; ZDRW-ZS-2016-3) ; 31571807 ; 31401116)
WOS记录号: WOS:000417204100005
ISSN号: 1674-2052
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/50616
Appears in Collections:藻类生物技术和生物能源研发中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Qingdao Inst BioEnergy & Bioproc Technol, CAS Key Lab Biofuels, Single Cell Ctr, Qingdao 266101, Shandong, Peoples R China
2.Chinese Acad Sci, Qingdao Inst BioEnergy & Bioproc Technol, Shandong Lab Energy Genet, Qingdao 266101, Shandong, Peoples R China
3.Univ Maryland, Ctr Environm Sci, Inst Marine & Environm Technol, Baltimore, MD 21201 USA
4.Univ Maryland Baltimore Cty, Baltimore, MD 21202 USA
5.Peking Univ, Coll Engn, Inst Food & Bioresource Engn, Beijing 100871, Peoples R China
6.Peking Univ, Coll Engn, Dept Energy & Resource Engn, Beijing 100871, Peoples R China
7.Chinese Acad Sci, Inst Hydrobiol, Ctr Microalgal Biotechnol & Biofuels, Wuhan 430072, Hubei, Peoples R China
8.Chinese Acad Sci, Inst Hydrobiol, Diatom Biol Grp, Wuhan 430072, Hubei, Peoples R China
9.Chinese Acad Sci, Qingdao Inst BioEnergy & Bioproc Technol, Core Lab, Qingdao 266101, Shandong, Peoples R China
10.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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