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首页> 外文期刊>Crystal growth & design >Alv Protein Plays Opposite Roles in the Transition of Amorphous Calcium Carbonate to Calcite and Aragonite during Shell Formation
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Alv Protein Plays Opposite Roles in the Transition of Amorphous Calcium Carbonate to Calcite and Aragonite during Shell Formation

机译:ALV蛋白在壳体形成期间在壳牌碳酸钙和金属石的转变中发挥相反的作用

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摘要

Amorphous calcium carbonate (ACC) is an important precursor in biominerals such as shells, coral, foraminiferans, and urchin spine. However, the mechanism underlying the transition from ACC to stable biosynthetic crystals is still poorly understood. Herein, we identified a matrix protein referred to as Alv in Pinctada fucata, which has dramatically opposite functions during the different transition processes from ACC to stable crystals-calcite and aragonite in shell formation. The functions of Alv were studied by RNA interference, binding of recombinant Alv (rAlv) to chitin, calcite and aragonite assay, ACC transition, in vitro crystallization, calcium carbonate precipitation, and near-UV CD spectra. We found that rAlv could promote nucleation during ACC crystallization, stimulate the transition from ACC to calcite, but suppress transition from ACC to aragonite. It is concluded that Alv is involved in the transition of ACC, and plays a crucial role in the formation of shells. As far as we know, Alv is one of the few reported matrix proteins which play opposite roles in the transition of ACC to calcite and aragonite both in vivo and in vitro. This study could further enhance our understanding of the important regulatory role of biomacromolecules in biomineralization.
机译:无定形碳酸钙(ACC)是生物体的重要前体,如贝壳,珊瑚,传染料,和血清脊柱。然而,从Acc到稳定的生物合成晶体过渡的机制仍然很差。在此,我们鉴定了Pinctada Fucata中称为ALV的基质蛋白,其在来自Acc的不同转变过程中具有显着相反的功能,以稳定晶体 - 方解石和壳体中的壳体。通过RNA干扰研究ALV的功能,将重组ALV(RALV)结合到几丁质,方解石和化石测定,ACC过渡,体外结晶,碳酸钙沉淀和接近UV CD光谱。我们发现RALV可以在ACC结晶期间促进成核,刺激从ACC的转变,但抑制来自ACC的转变为Aragonite。得出结论,ALV参与了ACC的转型,并在壳体的形成中起着至关重要的作用。据我们所知,ALV是少数报告的基质蛋白之一,其在体内和体外均在ACC的转变和化子中起作用的相反的作用。本研究可以进一步提高我们对生物茂化中生物致原因的重要调节作用的理解。

著录项

  • 来源
    《Crystal growth & design》 |2018年第7期|共11页
  • 作者单位

    Tsinghua Univ Sch Life Sci Minist Educ Prot Sci Lab Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Life Sci Minist Educ Prot Sci Lab Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Life Sci Minist Educ Prot Sci Lab Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Life Sci Minist Educ Prot Sci Lab Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Life Sci Minist Educ Prot Sci Lab Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Life Sci Minist Educ Prot Sci Lab Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Life Sci Minist Educ Prot Sci Lab Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Life Sci Minist Educ Prot Sci Lab Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Life Sci Minist Educ Prot Sci Lab Beijing 100084 Peoples R China;

    Tsinghua Univ Sch Life Sci Minist Educ Prot Sci Lab Beijing 100084 Peoples R China;

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

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