How did life emerge and evolve from a complex mineral at a submarine vent
Tuesday 9 November 2021, 16.00 hours
– Prof. Michael Russell, NIS Università degli Studi di Torino
Join the YouTube stream: [link will be announced later]
All the constituents for life’s emergence were there, at a submarine alkaline vent, about 4.4 billion years ago. And the redox and pH disequilibria across the vent precipitates were also appropriate drivers. There was no land and thus no “warm little ponds”.
In these conditions carboxylic and amino acids, the active centers of the metalloenzymes and condensed phosphates with reactive short peptides as their nests, are known to form, and hydrazine, bases, and methyl alcohol are likely although lipid content would be low.
So far, so apparently simple. But of course the concatenations of life are not chemistry, or not just chemistry and we can take it from Darwin that “in the beginning was complexity”. For example, nanoengines and pumps are mandatory as processors to convert the available ‘free’ energy for (proto)biosynthesis through reciprocal gating mechanisms.
How might such requirements for complex disequilibria converters be satisfied, not only for life’s emergence, but also to guarantee its evolvable continuities? Well, the main precipitate at the alkaline vents would have comprised billions upon billions of the 2D, double layered, variable valence, redox sensitive, physically flexible, solid electrolyte mineral, green rust or fougerite, a hydrated ferrous/ferric oxyhydroxide dosed with a plethora of transition metals and capable of absorbing a variety of anions.
These nanoengines have been shown to mediate the reactions just mentioned. These are remarkable and unexpected characteristics for a mineral known to have been the precursor of the Banded Iron Formations that are the resource for the first industrial revolution. But couldn’t such an abundant and yet complex mineral – or a ‘compendium’ of such a mineral – suggest potential for emergent autonomous computing and thereby providing a code to offspring?
Open to everyone
Origins Center webinars are streamed via YouTube and are open to everyone. You may ask questions, via chat. The scientific discussions with the “moderator of the day” are only interactively accessible to researchers only via video conferencing software.
Like to view a specific webinar at a more convenient moment? Each webinar is archived on the Origins Center YouTube channel.
Learn more about how the webinars work.