ArticleHeliyon2018
Early Archean origin of heterodimeric Photosystem I.
Article in Heliyon, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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17 citing papers in PubMed, 43 citations in OpenAlex.
- Replicating lipid micelles: a feasible precursor to the origin of life and the earliest appearance of genomes.Human genomics · 2026Review
- On the non-oxygenic origins of thylakoids.Communications biology · 2025Review
- How to Be a Copenhagenistic-QBistic Everettist.Entropy (Basel, Switzerland) · 2025Article
- Comments on "was hydrogen peroxide present before the arrival of oxygenic photosynthesis? The important role of iron(II) in the archean ocean".Redox biology · 2024Article
- What We Are Learning from the Diverse Structures of the Homodimeric Type I Reaction Center-Photosystems of Anoxygenic Phototropic Bacteria.Biomolecules · 2024Review
- Article
- Spectral diversity of photosystem I from flowering plants.Photosynthesis research · 2023Article
- Earliest Photic Zone Niches Probed by Ancestral Microbial Rhodopsins.Molecular biology and evolution · 2022Article
- Photosynthetic Systems Suggest an Evolutionary Pathway to Diderms.Acta biotheoretica · 2021Article
- Recent advances in the structural diversity of reaction centers.Photosynthesis research · 2021Article
- Time-resolved comparative molecular evolution of oxygenic photosynthesis.Biochimica et biophysica acta. Bioenergetics · 2021Article
- Immobilization of molecular catalysts for artificial photosynthesis.Nano convergence · 2020Review
- Factoring Origin of Life Hypotheses into the Search for Life in the Solar System and Beyond.Life (Basel, Switzerland) · 2020Review
- Cyanobacteria evolution: Insight from the fossil record.Free radical biology & medicine · 2019Review
- Thinking twice about the evolution of photosynthesis.Open biology · 2019Review
- Early Archean origin of Photosystem II.Geobiology · 2019Article
- Review
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Authors and funding
1 author at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
When and how oxygenic photosynthesis originated remains controversial. Wide uncertainties exist for the earliest detection of biogenic oxygen in the geochemical record or the origin of water oxidation in ancestral lineages of the phylum Cyanobacteria. A unique trait of oxygenic photosynthesis is that the process uses a Type I reaction centre with a heterodimeric core, also known as Photosystem I, made of two distinct but homologous subunits, PsaA and PsaB. In contrast, all other known Type I reaction centres in anoxygenic phototrophs have a homodimeric core. A compelling hypothesis for the evolution of a heterodimeric Type I reaction centre is that the gene duplication that allowed the divergence of PsaA and PsaB was an adaptation to incorporate photoprotective mechanisms against the formation of reactive oxygen species, therefore occurring after the origin of water oxidation to oxygen. Here I show, using sequence comparisons and Bayesian relaxed molecular clocks that this gene duplication event may have occurred in the early Archean more than 3.4 billion years ago, long before the most recent common ancestor of crown group Cyanobacteria and the Great Oxidation Event. If the origin of water oxidation predated this gene duplication event, then that would place primordial forms of oxygenic photosynthesis at a very early stage in the evolutionary history of life.
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