UV-light-driven prebiotic synthesis of iron-sulfur clusters.

UV-light-driven prebiotic synthesis of iron-sulfur clusters.
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DOI:
10.1038/nchem.2817
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发表时间:
2017-12
期刊:
影响因子:
21.8
通讯作者:
Mansy SS
Mansy SS
中科院分区:
化学1区
文献类型:
--
作者:
Bonfio C;Valer L;Scintilla S;Shah S;Evans DJ;Jin L;Szostak JW;Sasselov DD;Sutherland JD;Mansy SS

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Iron-sulfur clusters are ancient cofactors that play a fundamental role in metabolism and may have impacted the prebiotic chemistry that led to life. However, it is unclear whether iron-sulfur clusters could have been synthesized on prebiotic Earth. Dissolved iron on early Earth was predominantly in the reduced ferrous state, but ferrous ions alone cannot form polynuclear iron-sulfur clusters. Similarly, free sulfide may not have been readily available. Here we show that UV light drives the synthesis of [2Fe-2S] and [4Fe-4S] clusters through the photooxidation of ferrous ions and the photolysis of organic thiols. Iron-sulfur clusters coordinate to and are stabilized by a wide range of cysteine containing peptides, and the assembly of iron-sulfur cluster-peptide complexes can take place within model protocells in a process that parallels extant pathways. Our experiments suggest that iron-sulfur clusters may have formed easily on early Earth, facilitating the emergence of an iron-sulfur cluster dependent metabolism.
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