Phot0, a plausible primeval pigment on Earth and rocky exoplanets,Physical Chemistry Chemical Physics

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Phot0, a plausible primeval pigment on Earth and rocky exoplanets
Physical Chemistry Chemical Physics ( IF 2.9 ) Pub Date : 2022-06-15 , DOI: 10.1039/d2cp01703b
Juan García de la Concepción ₁ , Luis Cerdán ₂ , Pablo Marcos-Arenal ₁ , Mercedes Burillo-Villalobos ₃ , Nuria Fonseca-Bonilla ₁ , Rubén Lizcano-Vaquero ₄ , María-Ángeles López-Cayuela ₅ , José A Caballero ₆ , Felipe Gómez ₁

Affiliation

In view of the existing controversy around the origin of the photosynthesis and, therefore, the first photosynthetic pigments, our work focuses on the theoretical study of a hypothetical first pigment, simpler than those existing today, that collects energy from solar radiation on Earth-like exoplanets. Our theoretical results show that there could exist geochemical conditions that allow the abiotic formation of a primeval pigment that might become sufficiently abundant in the early stages of habitable rocky exoplanets. These conditions would place this pigment before the appearance of life in a very young planet, thanks to chemical routes instead of biochemical transformations. Thus, our results may refute the currently accepted hypothesis that the complex biomolecules that allowed the photosynthesis to be carried out were synthesized through complex and evolved metabolic pathways. In addition, we show that the proposed primeval pigment, which we call Phot0, is also a precursor of the more evolved pigments known today on Earth and demonstrate, for the first time, an abiotic chemical route leading to tetrapyrroles not involving pyrrole derivatives. Our proposal places simple and very abundant raw materials in never-before-proposed geochemical conditions that lead to the formation of biomolecules of biological interest.

中文翻译：

Phot0，地球和岩石系外行星上一种似是而非的原始色素

鉴于围绕光合作用起源的现有争议，因此，第一种光合色素，我们的工作重点是对一种假设的第一种色素的理论研究，它比今天存在的更简单，它从类地太阳辐射中收集能量系外行星。我们的理论结果表明，可能存在地球化学条件，允许非生物形成原始色素，这种色素可能在可居住的岩石系外行星的早期阶段变得足够丰富。由于化学途径而不是生化转化，这些条件将使这种色素在一个非常年轻的星球上出现生命之前。因此，我们的结果可能会反驳目前公认的假设，即允许进行光合作用的复杂生物分子是通过复杂和进化的代谢途径合成的。此外，我们表明，我们称之为 Phot0 的所提出的原始颜料也是当今地球上已知的更进化的颜料的前体，并首次证明了一种非生物化学途径导致四吡咯不涉及吡咯衍生物。我们的提议将简单且非常丰富的原材料置于前所未有的地球化学条件下，从而形成具有生物学意义的生物分子。第一次，一种非生物化学途径导致四吡咯不涉及吡咯衍生物。我们的提议将简单且非常丰富的原材料置于前所未有的地球化学条件下，从而形成具有生物学意义的生物分子。第一次，一种非生物化学途径导致四吡咯不涉及吡咯衍生物。我们的提议将简单且非常丰富的原材料置于前所未有的地球化学条件下，从而形成具有生物学意义的生物分子。

更新日期：2022-06-15

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