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UV Resistance of Nucleosides—An Experimental Approach
ACS Earth and Space Chemistry ( IF 2.9 ) Pub Date : 2020-11-23 , DOI: 10.1021/acsearthspacechem.0c00228
Max Winkler 1 , Barbara M. Giuliano 1 , Paola Caselli 1
Affiliation  

The emergence of life on Earth is a highly discussed but still unsolved question. Current research underlines the importance of environments within close proximity to the Earth’s surface as they can solve long-standing problems such as polymerization of nucleotides and phosphorylation of nucleosides. However, near-surface settings, for example, ponds or ice shields, are prone to UV irradiation. We investigated the photosensitivity of uracil, uridine, adenosine, cytidine, and guanosine by using Raman microscopy. The samples were irradiated by a UV source with 150 mW/cm2 for 10 min. Uracil and uridine showed the highest photosensitivity, while adenosine, cytidine, and guanosine remained stable. The change of spectral features and ab initio quantum calculations indicate the formation of uracil’s trans-syn cyclobutane dimer during UV irradiation.

中文翻译:

核苷的抗紫外线性:一种实验方法

地球上生命的出现是一个经过高度讨论但仍未解决的问题。当前的研究强调了靠近地球表面的环境的重要性,因为它们可以解决长期存在的问题,例如核苷酸的聚合和核苷的磷酸化。但是,在近地表设置中,例如池塘或挡冰板容易受到紫外线辐射。我们通过使用拉曼显微镜研究了尿嘧啶,尿苷,腺苷,胞苷和鸟苷的光敏性。用150 mW / cm 2的紫外线源照射样品10分钟 尿嘧啶和尿苷显示出最高的光敏性,而腺苷,胞苷和鸟苷保持稳定。光谱特征的变化和从头算量子计算表明在紫外线照射期间尿嘧啶的反式-顺式环丁烷二聚体的形成。
更新日期:2020-12-17
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