Theoretical isotopic fractionation of magnesium between chlorophylls

Theoretical isotopic fractionation of magnesium between chlorophylls

Abstract Magnesium is the metal at the center of all types of chlorophyll and is thus crucial to photosynthesis. When an element is involved in a biosynthetic pathway its isotopes are fractionated based on the difference of vibrational frequency between the different molecules. With the technical ad...

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Autores principales: Frédéric Moynier, Toshiyuki Fujii
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2017
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Acceso en línea:https://doaj.org/article/1072890b9915475aa0f0c66bc470e9cc
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spelling oai:doaj.org-article:1072890b9915475aa0f0c66bc470e9cc2021-12-02T16:06:45ZTheoretical isotopic fractionation of magnesium between chlorophylls10.1038/s41598-017-07305-62045-2322https://doaj.org/article/1072890b9915475aa0f0c66bc470e9cc2017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07305-6https://doaj.org/toc/2045-2322Abstract Magnesium is the metal at the center of all types of chlorophyll and is thus crucial to photosynthesis. When an element is involved in a biosynthetic pathway its isotopes are fractionated based on the difference of vibrational frequency between the different molecules. With the technical advance of multi-collectors plasma-mass-spectrometry and improvement in analytical precision, it has recently been found that two types of chlorophylls (a and b) are isotopically distinct. These results have very significant implications with regards to the use of Mg isotopes to understand the biosynthesis of chlorophyll. Here we present theoretical constraints on the origin of these isotopic fractionations through ab initio calculations. We present the fractionation factor for chlorphyll a, b, d, and f. We show that the natural isotopic variations among chlorophyll a and b are well explained by isotopic fractionation under equilibrium, which implies exchanges of Mg during the chlorophyll cycle. We predict that chlorophyll d and f should be isotopically fractionated compared to chlorophyll a and that this could be used in the future to understand the biosynthesis of these molecules.Frédéric MoynierToshiyuki FujiiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-6 (2017)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Frédéric Moynier
Toshiyuki Fujii
Theoretical isotopic fractionation of magnesium between chlorophylls
description Abstract Magnesium is the metal at the center of all types of chlorophyll and is thus crucial to photosynthesis. When an element is involved in a biosynthetic pathway its isotopes are fractionated based on the difference of vibrational frequency between the different molecules. With the technical advance of multi-collectors plasma-mass-spectrometry and improvement in analytical precision, it has recently been found that two types of chlorophylls (a and b) are isotopically distinct. These results have very significant implications with regards to the use of Mg isotopes to understand the biosynthesis of chlorophyll. Here we present theoretical constraints on the origin of these isotopic fractionations through ab initio calculations. We present the fractionation factor for chlorphyll a, b, d, and f. We show that the natural isotopic variations among chlorophyll a and b are well explained by isotopic fractionation under equilibrium, which implies exchanges of Mg during the chlorophyll cycle. We predict that chlorophyll d and f should be isotopically fractionated compared to chlorophyll a and that this could be used in the future to understand the biosynthesis of these molecules.
format article
author Frédéric Moynier
Toshiyuki Fujii
author_facet Frédéric Moynier
Toshiyuki Fujii
author_sort Frédéric Moynier
title Theoretical isotopic fractionation of magnesium between chlorophylls
title_short Theoretical isotopic fractionation of magnesium between chlorophylls
title_full Theoretical isotopic fractionation of magnesium between chlorophylls
title_fullStr Theoretical isotopic fractionation of magnesium between chlorophylls
title_full_unstemmed Theoretical isotopic fractionation of magnesium between chlorophylls
title_sort theoretical isotopic fractionation of magnesium between chlorophylls
publisher Nature Portfolio
publishDate 2017
url https://doaj.org/article/1072890b9915475aa0f0c66bc470e9cc
work_keys_str_mv AT fredericmoynier theoreticalisotopicfractionationofmagnesiumbetweenchlorophylls
AT toshiyukifujii theoreticalisotopicfractionationofmagnesiumbetweenchlorophylls
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