Using protein structures for the first time in such a study, the research establishes one of the influences that geochemistry has had upon life.
The study, published in this week’s edition of the Proceedings of the National Academy of Sciences, sought to verify the theory that the rise in atmospheric oxygen some 2.3 billion years ago, and attendant shifts in ocean chemistry, led to changes in types of metals used with protein structures. Such changes are hypothesized to have led to the diversification and increased complexity of the life we see today.
Scientists Chris Dupont, Song Yang, Brian Palenik and Philip Bourne from the San Diego Supercomputer Center (SDSC), Scripps Institution of Oceanography, and the departments of chemistry and biochemistry and pharmacology at the University of California, San Diego (UCSD) analyzed the metal-binding characteristics of all known protein structures found in all kingdoms of life.
“Protein structures are ideal for this study,” Bourne said, “since they are much more conserved than protein sequences, traditionally used in such studies and, furthermore, metal binding can be inferred directly.”
Using data generated by Dupont and Yang, the group established that the three superkingdoms of life – Archaea, Bacteria and Eukarya -- all use metals differently. The differences reflect the availability of such metals in the ocean as the respective superkingdoms evolved.
The authors conclude that, “these conserved trends are proteomic imprints of changes in trace-metal bioavailability in the ancient ocean that highlight a major evolutionary shift in biological trace-metal usage.”
The changes in trace-metal availability are believed to have been brought about by the biologically caused rise in atmospheric oxygen some 2.3 billion years ago, highlighting the co-evolution of biology and geochemistry on a global scale.
“Here, a biological phenomenon, photosynthesis, changed the availability of trace metals in the oceans,” Dupont said, “resulting in a reciprocal change in biological evolution still observable today.”
The group notes that, “such studies linking the study of the earth sciences with that of the life sciences are limited and certainly no one has previously looked at this exciting area from the perspective of protein structure. We hope this will encourage others to undertake such interdisciplinary work.”
Paul K. Mueller | EurekAlert!
Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery
20.01.2017 | GSI Helmholtzzentrum für Schwerionenforschung GmbH
Seeking structure with metagenome sequences
20.01.2017 | DOE/Joint Genome Institute
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
20.01.2017 | Awards Funding
20.01.2017 | Materials Sciences
20.01.2017 | Life Sciences