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Biological phosphorylated molecules participate in the biomimetic and biological synthesis of cadmium sulphide quantum dots by promoting H2S release from cellular thiols

机译:生物磷酸化分子通过从细胞硫醇释放H2S释放来参与硫化镉量子点的仿生和生物合成

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摘要

Developing methods with a low environmental impact for nanoparticle synthesis remains one of the greatest challenges in nanotechnology. In this context, biomimetic and biological methods have emerged as green chemistry alternatives, and also contribute to our understanding of how nanomaterials interact with cellular molecules. Here, we report a phosphate-dependent biomimetic method to synthesize of cadmium sulphide (CdS) QDs at low temperatures, physiological pH and aerobic conditions, using CdCl2 and thiols (L-cysteine, glutathione or mercaptosuccinic acid). Inorganic phosphate (Pi) and cellular phosphorylated intermediates such as adenosine monophosphate, glucose-6-phosphate, glycerol-2-phosphate and fructose-1,6-biphosphate, can trigger CdS QDs synthesis. The produced QDs are cubic phase nanocrystals with a tunable fluorescence (450-700 nm), small size (4-12 nm), and are composed of thiols and Pi. In CdS synthesis, the importance of the phosphate is related to its capacity to release H2S from thiols, a phenomenon associated with its base-properties. Based on the biomimetic method, we developed a Pi-based procedure to synthesize CdS QDs in Escherichia coli. As in the biomimetic procedure, Pi favors QDs-biosynthesis not only by mediating biological generation of H2S, but also by improving Cd2+ cellular uptake. A role for phosphates in the cellular interaction and green synthesis of metal QDs is discussed.
机译:纳米粒子合成环境影响低的开发方法仍然是纳米技术最大的挑战之一。在这种情况下,仿生和生物学方法已成为绿色化学替代品,并且还有助于我们理解纳米材料如何与细胞分子相互作用。这里,我们通过CDCl 2和硫醇(L-半胱氨酸,谷胱甘肽或巯基霉素)在低温下,在低温,生理pH和好氧条件下合成磷酸依赖性仿生方法以合成硫化镉(Cds)Qds。无机磷酸盐(PI)和细胞磷酸化中间体如腺苷一磷酸,葡萄糖-6-磷酸,甘油-2-磷酸盐和果糖-1,6-二磷酸,可以触发CDS QD合成。所产生的QD是具有可调谐荧光(450-700nm),小尺寸(4-12nm)的立方相纳米晶体,并且由硫醇和pi组成。在CdS合成中,磷酸盐的重要性与其释放来自硫醇的H 2 S的能力,其与其基础特性相关的现象。基于仿生方法,我们开发了一种基于PI的过程,在大肠杆菌中合成CDS QD。如在仿生过程中,PI不仅通过介导H2S的生物产生,而且还通过改善CD2 +细胞摄取的QDS-Biosynesis。讨论了磷酸盐在细胞相互作用和绿色合成的磷酸酯的作用。

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  • 来源
    《RSC Advances》 |2017年第64期|共9页
  • 作者单位

    Univ Andres Bello Bionanotechnol &

    Microbiol Lab CBIB Fac Ciencias Biol Ave Republ 239 Santiago 8370146 Chile;

    Univ Andres Bello Bionanotechnol &

    Microbiol Lab CBIB Fac Ciencias Biol Ave Republ 239 Santiago 8370146 Chile;

    Univ Andres Bello Bionanotechnol &

    Microbiol Lab CBIB Fac Ciencias Biol Ave Republ 239 Santiago 8370146 Chile;

    Univ Andres Bello Bionanotechnol &

    Microbiol Lab CBIB Fac Ciencias Biol Ave Republ 239 Santiago 8370146 Chile;

    Comis Nacl Energia Atom Ctr Atom Bariloche RA-8400 San Carlos De Bariloche Argentina;

    Univ Andres Bello Bionanotechnol &

    Microbiol Lab CBIB Fac Ciencias Biol Ave Republ 239 Santiago 8370146 Chile;

    Univ Andres Bello Bionanotechnol &

    Microbiol Lab CBIB Fac Ciencias Biol Ave Republ 239 Santiago 8370146 Chile;

    Univ Chile Lab Microbiol Oral Fac Odontol Sergio Livingstone Pohlhammer 943 Santiago Chile;

    Univ Andres Bello Bionanotechnol &

    Microbiol Lab CBIB Fac Ciencias Biol Ave Republ 239 Santiago 8370146 Chile;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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