Nucleic acids and melanin pigments after exposure to high doses of gamma rays: a biosignature robustness test

IF 1.7 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS
A. Cassaro, C. Pacelli, M. Baqué, A. Maturilli, U. Boettger, R. Moeller, A. Fujimori, J. D. de Vera, S. Onofri
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引用次数: 3

Abstract

Abstract The question about the stability of certain biomolecules is directly connected to the life-detection missions aiming to search for past or present life beyond Earth. The extreme conditions experienced on extraterrestrial planet surface (e.g. Mars), characterized by ionizing and non-ionizing radiation, CO2-atmosphere and reactive species, may destroy the hypothetical traces of life. In this context, the study of the biomolecules behaviour after ionizing radiation exposure could provide support for the onboard instrumentation and data interpretation of the life exploration missions on other planets. Here, as a part of STARLIFE campaign, we investigated the effects of gamma rays on two classes of fungal biomolecules–nucleic acids and melanin pigments – considered as promising biosignatures to search for during the ‘in situ life-detection’ missions beyond Earth.
暴露于高剂量伽马射线后的核酸和黑色素:生物标记稳健性测试
某些生物分子的稳定性问题直接关系到旨在寻找地球外过去或现在生命的生命探测任务。在地外行星(如火星)表面经历的极端条件,以电离和非电离辐射、二氧化碳大气和活性物质为特征,可能会破坏假设的生命痕迹。在这种背景下,研究电离辐射暴露后生物分子的行为可以为其他行星生命探测任务的机载仪器和数据解释提供支持。在这里,作为STARLIFE活动的一部分,我们研究了伽马射线对两类真菌生物分子的影响——核酸和黑色素色素——被认为是在地球以外的“原位生命探测”任务中有希望寻找的生物特征。
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来源期刊
International Journal of Astrobiology
International Journal of Astrobiology 地学天文-地球科学综合
CiteScore
3.70
自引率
11.80%
发文量
45
审稿时长
>12 weeks
期刊介绍: International Journal of Astrobiology is the peer-reviewed forum for practitioners in this exciting interdisciplinary field. Coverage includes cosmic prebiotic chemistry, planetary evolution, the search for planetary systems and habitable zones, extremophile biology and experimental simulation of extraterrestrial environments, Mars as an abode of life, life detection in our solar system and beyond, the search for extraterrestrial intelligence, the history of the science of astrobiology, as well as societal and educational aspects of astrobiology. Occasionally an issue of the journal is devoted to the keynote plenary research papers from an international meeting. A notable feature of the journal is the global distribution of its authors.
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