形成叶酸强化大米

IF 12.9 1区 生物学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY
Francesco Zamberlan
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引用次数: 0

摘要

叶酸是一类水溶性 B 族维生素,是所有生物体所必需的。虽然植物和微生物可以合成叶酸,但人类却不能,叶酸摄入不足会导致多种疾病。因此,找到有助于缓解叶酸营养不良的叶酸来源非常重要。谷物是叶酸的贫乏来源,但却含有大量的 MeFox,这是一种 4α-羟基-5-甲基四氢叶酸的吡嗪-s-三嗪衍生物,是叶酸的一种无生物活性的氧化形式,表明有可能靶向形成叶酸。现在,Liang 等人通过共同表达两个叶酸生物合成基因来增强代谢通量,并通过基因编辑来阻止叶酸氧化,从而创造出叶酸生物强化水稻。研究小组发现并验证了 OsGFT 在水稻 MeFox 形成过程中的关键作用,并通过 CRISPR-Cas9 基因编辑技术有针对性地敲除了该基因,从而使水稻植株中的 5-甲基四氢叶酸和其他生物活性叶酸含量升高。接下来,研究小组将基因编辑策略与拟南芥基因 GTP 环氢酶 1 (GCH1) 和氨基脱氧胆酸盐合成酶 (ADCS) 的过表达相结合,这两个基因负责叶酸支架关键成分生物合成的第一步。这使得转基因植物的总叶酸含量比野生型(WT)高出 13 倍,MeFox 的平均含量是 WT 的 33%。此外,植物和种子都没有表现出与 WT 的表型差异,研究小组还证明,在碾米中也能发现叶酸含量的增加。这项研究展示了工程全谷物大米解决叶酸营养缺乏问题的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Forming folate-fortified rice
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来源期刊
Nature chemical biology
Nature chemical biology 生物-生化与分子生物学
CiteScore
23.90
自引率
1.40%
发文量
238
审稿时长
12 months
期刊介绍: Nature Chemical Biology stands as an esteemed international monthly journal, offering a prominent platform for the chemical biology community to showcase top-tier original research and commentary. Operating at the crossroads of chemistry, biology, and related disciplines, chemical biology utilizes scientific ideas and approaches to comprehend and manipulate biological systems with molecular precision. The journal embraces contributions from the growing community of chemical biologists, encompassing insights from chemists applying principles and tools to biological inquiries and biologists striving to comprehend and control molecular-level biological processes. We prioritize studies unveiling significant conceptual or practical advancements in areas where chemistry and biology intersect, emphasizing basic research, especially those reporting novel chemical or biological tools and offering profound molecular-level insights into underlying biological mechanisms. Nature Chemical Biology also welcomes manuscripts describing applied molecular studies at the chemistry-biology interface due to the broad utility of chemical biology approaches in manipulating or engineering biological systems. Irrespective of scientific focus, we actively seek submissions that creatively blend chemistry and biology, particularly those providing substantial conceptual or methodological breakthroughs with the potential to open innovative research avenues. The journal maintains a robust and impartial review process, emphasizing thorough chemical and biological characterization.
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