Language:

Lost world of complex life and the late rise of the eukaryotic crown

Nature (London), 2023-06, Vol.618 (7966), p.767-773 [Peer Reviewed Journal]

2023. The Author(s), under exclusive licence to Springer Nature Limited. ;Copyright Nature Publishing Group Jun 22, 2023 ;Distributed under a Creative Commons Attribution 4.0 International License ;ISSN: 0028-0836 ;EISSN: 1476-4687 ;DOI: 10.1038/s41586-023-06170-w ;PMID: 37286610

Digital Resources/Online E-Resources

Citations Cited by

Actions
1. Add to My Research
2. Remove from My Research
3. E-mail
4. Print
5. Permalink
6. Citation
7. EasyBib
8. EndNote
9. RefWorks
10. Delicious
11. Export RIS
12. Export BibTeX

Title:
Lost world of complex life and the late rise of the eukaryotic crown
Author: Brocks, Jochen J ; Nettersheim, Benjamin J ; Adam, Pierre ; Schaeffer, Philippe ; Jarrett, Amber J M ; Güneli, Nur ; Liyanage, Tharika ; van Maldegem, Lennart M ; Hallmann, Christian ; Hope, Janet M
Subjects: Algae ; Aquatic environment ; Aquatic Organisms - chemistry ; Aquatic Organisms - classification ; Aquatic Organisms - metabolism ; Astrochemistry ; Bacteria ; Bacteria - chemistry ; Bacteria - metabolism ; Biodiversity ; Biological Evolution ; Biomarkers ; Biosynthetic Pathways ; Biota ; Chemical Sciences ; Clocks ; Earth Sciences ; Eukaryota - chemistry ; Eukaryota - classification ; Eukaryota - metabolism ; Eukaryotes ; Eukaryotic Cells - chemistry ; Eukaryotic Cells - classification ; Eukaryotic Cells - metabolism ; Evolution ; Fossils ; Geologic Sediments - chemistry ; Geology ; History, Ancient ; Intermediates ; Life Sciences ; Marine sediments ; Phylogeny ; Populations and Evolution ; Sciences of the Universe ; Sedimentary rocks ; Sediments ; Steroids ; Sterols ; Sterols - analysis ; Sterols - biosynthesis ; Sterols - isolation & purification ; Sterols - metabolism ; Trends
Is Part Of: Nature (London), 2023-06, Vol.618 (7966), p.767-773
Description: Eukaryotic life appears to have flourished surprisingly late in the history of our planet. This view is based on the low diversity of diagnostic eukaryotic fossils in marine sediments of mid-Proterozoic age (around 1,600 to 800 million years ago) and an absence of steranes, the molecular fossils of eukaryotic membrane sterols . This scarcity of eukaryotic remains is difficult to reconcile with molecular clocks that suggest that the last eukaryotic common ancestor (LECA) had already emerged between around 1,200 and more than 1,800 million years ago. LECA, in turn, must have been preceded by stem-group eukaryotic forms by several hundred million years . Here we report the discovery of abundant protosteroids in sedimentary rocks of mid-Proterozoic age. These primordial compounds had previously remained unnoticed because their structures represent early intermediates of the modern sterol biosynthetic pathway, as predicted by Konrad Bloch . The protosteroids reveal an ecologically prominent 'protosterol biota' that was widespread and abundant in aquatic environments from at least 1,640 to around 800 million years ago and that probably comprised ancient protosterol-producing bacteria and deep-branching stem-group eukaryotes. Modern eukaryotes started to appear in the Tonian period (1,000 to 720 million years ago), fuelled by the proliferation of red algae (rhodophytes) by around 800 million years ago. This 'Tonian transformation' emerges as one of the most profound ecological turning points in the Earth's history.
Publisher: England: Nature Publishing Group
Language: English
Identifier: ISSN: 0028-0836
EISSN: 1476-4687
DOI: 10.1038/s41586-023-06170-w
PMID: 37286610
Source: Hyper Article en Ligne (HAL) (Open Access)

Back to results list


INSPIRE LIBRARY - TON DUC THANG UNIVERSITY	(84-028) 37 755 057	Feedback
19 Nguyen Huu Tho St. Dist.7, HCM	thuvien@tdtu.edu.vn	Feedback

Lost world of complex life and the late rise of the eukaryotic crown

2023. The Author(s), under exclusive licence to Springer Nature Limited. ;Copyright Nature Publishing Group Jun 22, 2023 ;Distributed under a Creative Commons Attribution 4.0 International License ;ISSN: 0028-0836 ;EISSN: 1476-4687 ;DOI: 10.1038/s41586-023-06170-w ;PMID: 37286610

Searching Remote Databases, Please Wait