التفاصيل البيبلوغرافية
| العنوان: |
Timing the evolution of phosphorus-cycling enzymes through geological time using phylogenomics. |
| المؤلفون: |
Boden, Joanne S., Zhong, Juntao, Anderson, Rika E., Stüeken, Eva E. |
| المصدر: |
Nature Communications; 5/2/2024, Vol. 15 Issue 1, p1-12, 12p |
| مصطلحات موضوعية: |
GEOLOGICAL time scales, GREAT Oxidation Event, PHOSPHORUS compounds, BIOLOGICAL productivity, PRECAMBRIAN, ORIGIN of life |
| مستخلص: |
Phosphorus plays a crucial role in controlling biological productivity, but geological estimates of phosphate concentrations in the Precambrian ocean, during life's origin and early evolution, vary over several orders of magnitude. While reduced phosphorus species may have served as alternative substrates to phosphate, their bioavailability on the early Earth remains unknown. Here, we reconstruct the phylogenomic record of life on Earth and find that phosphate transporting genes (pnas) evolved in the Paleoarchean (ca. 3.6-3.2 Ga) and are consistent with phosphate concentrations above modern levels (> 3 µM). The first gene optimized for low phosphate levels (pstS; <1 µM) appeared around the same time or in the Mesoarchean depending on the reconstruction method. Most enzymatic pathways for metabolising reduced phosphorus emerged and expanded across the tree of life later. This includes phosphonate-catabolising CP-lyases, phosphite-oxidising pathways and hypophosphite-oxidising pathways. CP-lyases are particularly abundant in dissolved phosphate concentrations below 0.1 µM. Our results thus indicate at least local regions of declining phosphate levels through the Archean, possibly linked to phosphate-scavenging Fe(III), which may have limited productivity. However, reduced phosphorus species did not become widely used until after the Paleoproterozoic Great Oxidation Event (2.3 Ga), possibly linked to expansion of the biosphere at that time. Phosphorus is an essential nutrient which may have influenced Earth's early biosphere. This study interrogates genomic records, finding potentially phosphate depleted conditions toward the end of the Archean when enzymes for scavenging reduced phosphorus compounds spread throughout the tree of life. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
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