细胞成分氮同位素比率的调节

IF 3.5 3区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Progress in Earth and Planetary Science Pub Date : 2024-08-22 DOI:10.1186/s40645-024-00646-7
Naohiko Ohkouchi, Yuta Isaji, Nanako O. Ogawa
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引用次数: 0

摘要

本文试图从我们的角度归纳构成细胞的分子的氮同位素信息。细胞中的氮以 20 种蛋白质氨基酸、核碱基、hemes、叶绿素等形式存在,它们在不同生物体中的组成相似。基于一个生理上简单的、保持输入和输出平衡的自主系统,理论上可以预测,15N 会以一定的规律性分配到每种细胞化合物中,因此化合物之间的氮同位素比值存在特定的关系。以往的研究基本上证实了这一点。构成细胞的第 i 种化合物的氮同位素比值可概括为 δ15Ni = δ15Nplant + Δi (TP - 1) + γi,其中 TP 代表营养位置,Δi 和 γi 分别为营养鉴别因子和第 i 种化合物的细胞内 15N 分布。了解 Δi 和 γi 的可靠值将有助于我们更好地理解生物圈中的氮动态,并通过生物地球化学推进我们对地球环境图景的理解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Regulation of nitrogen isotopic ratios of cellular components

This paper is an attempt to generalize the nitrogen isotope information of the molecules that make up the cell from our point of view. Nitrogen in the cell exists as 20 proteinaceous amino acids, nucleobases, hemes, chlorophylls, and others, and their composition is similar among organisms. Based on a physiologically simple autonomous system that maintains a balance between inputs and outputs, it is theoretically predicted that 15N is distributed to each cellular compound with a certain regularity, and thus a specific relationship in nitrogen isotopic ratios among compounds. Previous studies essentially confirm this. The nitrogen isotopic ratio of compound i constituting the cell can be generalized as δ15Ni = δ15Nplant + Δi (TP − 1) + γi, where TP represents the trophic position, and Δi and γi are the trophic discrimination factor and the intracellular 15N distribution of compound i, respectively. Knowing reliable values of Δi and γi will help us to better understand nitrogen dynamics in the biosphere and advance our understanding of the picture of the Earth’s environment through biogeochemistry.

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来源期刊
Progress in Earth and Planetary Science
Progress in Earth and Planetary Science Earth and Planetary Sciences-General Earth and Planetary Sciences
CiteScore
6.50
自引率
5.10%
发文量
59
审稿时长
31 weeks
期刊介绍: Progress in Earth and Planetary Science (PEPS), a peer-reviewed open access e-journal, was launched by the Japan Geoscience Union (JpGU) in 2014. This international journal is devoted to high-quality original articles, reviews and papers with full data attached in the research fields of space and planetary sciences, atmospheric and hydrospheric sciences, human geosciences, solid earth sciences, and biogeosciences. PEPS promotes excellent review articles and welcomes articles with electronic attachments including videos, animations, and large original data files. PEPS also encourages papers with full data attached: papers with full data attached are scientific articles that preserve the full detailed raw research data and metadata which were gathered in their preparation and make these data freely available to the research community for further analysis.
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