生物形态通过在有机生物分子和无机离子存在下调整其形态和化学成分而拥有矿物晶体可塑性,ACS Earth and Space Chemistry

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生物形态通过在有机生物分子和无机离子存在下调整其形态和化学成分而拥有矿物晶体可塑性
ACS Earth and Space Chemistry ( IF 2.9 ) Pub Date : 2023-11-16 , DOI: 10.1021/acsearthspacechem.3c00236
Julio César Cuéllar-Arcos ₁ , Selene R. Islas ₂ , Mayra Cuéllar-Cruz ₁

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生物体的结构，从微生物到高等生物，都是由有机分子和无机分子共存构成的。据推测，自从发现先驱生物体以来，这两个部分就已经存在，并且一直保存至今。评估简单的有机化合物和化学元素是否是原始细胞的一部分至关重要，因为它可以让我们了解为什么矿物质和有机部分共存于当前的生物体中。为了在这个意义上取得进展，我们的研究小组使用了被称为生物形态的碱土金属的二氧化硅碳酸盐作为研究模型，由于其独特的特性，我们假设这是原始时代和现代时代之间的差距。为了评估生物形态是否在其结构中融入了不同的生物分子和化学元素，我们决定在 DNA、葡萄糖和铁存在的情况下，在模拟前寒武纪和当前时代大气的两种条件下合成生物形态。通过扫描电子显微镜鉴定了所得生物形态的结构，并通过拉曼光谱和红外光谱确定了化学成分和晶体结构。结果表明，生物形态包含多种生物分子，如核酸、碳水化合物（如葡萄糖）和无机离子（如 Fe ²⁺ –Fe ^{3+ ）}。这些特征支持这样的理论：生物形态可能是原始生命形式和当前有机体之间的差距。

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Biomorphs Possess Mineral-Crystalline Plasticity by Adapting Their Morphology and Chemical Composition in the Presence of Organic Biomolecules and Inorganic Ions

The structure of organisms, from microorganisms to higher ones, is constituted by the coexistence of organic and inorganic molecules. It is assumed that both parts have existed since the discovery of the pioneer organism and have been conserved till this time. Evaluating whether simple organic compounds and chemical elements were part of the protocell is fundamental because it would allow an understanding of why the mineral and the organic parts coexist in the current organisms. To advance in this sense, our research group has used the silica carbonates of alkaline earth metals called biomorphs as study models, which we postulate to be the gap between the primitive and current era due to their unique characteristics. To evaluate whether biomorphs incorporate different biomolecules and chemical elements in their structure, we decided to synthesize biomorphs in the presence of DNA, glucose, and iron, in two conditions that emulate the atmosphere of Precambrian and the current era. The structures of the obtained biomorphs were identified through scanning electron microscopy, and the chemical composition and crystalline structure were determined through Raman and infrared spectroscopy. Results revealed that biomorphs incorporate several biomolecules like nucleic acids, carbohydrates like glucose, and inorganic ions like Fe²⁺–Fe³⁺. These characteristics favor the theory that biomorphs are possibly the gap between the primitive forms of life and current organisms.

更新日期：2023-11-16

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