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题名: Identification of the role of polar glycerolipids in lipid metabolism and their acyl attribution for TAG accumulation in Nannochloropsis oceanica
作者: Meng, Yingying1, 2;  Cao, Xupeng2;  Yao, Changhong2;  Xue, Song2;  Yang, Qing1
关键词: Nannochloropsis ;  Lipidomics ;  Polar glycerolipids metabolism ;  TAG accumulation ;  Nitrogen starvation
刊名: ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
发表日期: 2017-06-01
DOI: 10.1016/j.algal.2017.03.004
卷: 24, 页:122-129
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Life Sciences & Biomedicine
类目[WOS]: Biotechnology & Applied Microbiology
研究领域[WOS]: Biotechnology & Applied Microbiology
英文摘要: Nannochloropsis, an ocean microalgal genus, is a promising resource of biodiesel feedstock because of its capacity for triacylglycerol (TAG) accumulation. Polar glycerolipids have big contribution for TAG accumulation by providing acyl group or diacylglycerol (DAG). Due to the diversities and amount of polar glycerolipids in species, a suitable approach has not been developed well to quantify and qualify, which veils the clarification of how important roles the polar glycerolipids play in microalgal lipid metabolism and TAG accumulation. In this study, a total of 112 polar glycerolipid species, covering eight classes, were identified using UPLC/Q-TRAP plus Orbitrap coupled with quantified using UPLC/Q-TOF. A comprehensive profiling of polar glycerolipid was established to study the polar glycerolipids variations in response to nitrogen deprivation in Nannochloropsis oceanica. Through targeted lipidomics analysis it was proposed that in N. oceanica, phosphatidylcholine (PC) serve as linoleic and gamma-linolenic acyl donors via oleic acyl desaturation, and under nitrogen stress condition PC transfers acyl 16:0 and 18:1 to TAG. The result disclosed PC played import roles for TAG accumulation not only in high plants but also in PC-containing microalgae even PC is not the most extraplastidial lipid. In addition, it was showed that phosphatidylethanolamine (PE) and diacylglyceryl-N-trimethylhomoserine (DGTS) are suppliers of eicosapentaenoic acid (EPA) to other lipids. These new discoveries reveal the diversity of microalgae in acyl metabolism and shed light on the understanding of lipid biosynthesis by stoichiometry. (C) 2017 Published by Elsevier B.V.
关键词[WOS]: CHROMATOGRAPHY-MASS SPECTROMETRY ;  DIATOM FISTULIFERA-SOLARIS ;  CHLAMYDOMONAS-REINHARDTII ;  EICOSAPENTAENOIC ACID ;  TRIACYLGLYCEROL ACCUMULATION ;  PHAEODACTYLUM-TRICORNUTUM ;  LIQUID-CHROMATOGRAPHY ;  NITROGEN DEPRIVATION ;  FATTY-ACIDS ;  BIOSYNTHESIS
语种: 英语
WOS记录号: WOS:000404864600012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/152077
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Dalian Univ Technol, Sch Life Sci & Biotechnol, Dalian 116024, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Marine Bioprod Engn Grp, Dalian 116023, Peoples R China

Recommended Citation:
Meng, Yingying,Cao, Xupeng,Yao, Changhong,et al. Identification of the role of polar glycerolipids in lipid metabolism and their acyl attribution for TAG accumulation in Nannochloropsis oceanica[J]. ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS,2017,24:122-129.
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