Thanks Apokrisis,
I can see why you're drawn to this idea, particularly that the removal of the product that allows the reactants to continue to flow, sustaining the energy gradient. Of course though the reactants would have continued to flow, it just establishes the gradient.
I have some points for you to consider though that I will formulate as questions in the hope you can provide more insight. Perhaps a clearer understanding of the Hadean era sea on my part would help resolve these issues.
So you are halfway to the basic metabolic set-up life. And now proper organic machinery that can "eat" methane is energetically favoured — apokrisis
1. The methane eaters are enzymatic in function. Are they proteinaceous enzymes or simple organic compounds that convert to another compound after eating the methane?
Actual cells only have to internalise this existing chemistry by forming a vesicle - and lipid waste does this spontaneously in water. — apokrisis
2. Where did the phospholipid bilayer (lipid waste) come from and how did it entrap the methane eaters (is it just a hydrocarbon without phosphate)? Were there not methane eaters outside of the vesicle as well?
Would not the vesicle already by formed because of its hydrophobic nature prior to encountering the methane?
3. The pump is a Na+/H+ exchanger? Is it Active or Passive transport? If it's passive, then the driver for the exchanger would be the proton gradient I'm assuming if the vesicle drifted into the vent region? Again proteinaceous in structure? If it's active transport, then what is powering it? ATP?
4. Just to elaborate on the last point the direction of movement of the ions was Hydrogen in, Sodium out?
5. How did the 'pump' get in the vesicle bilayer? Where was it being synthesised in large enough quantity for it to not be a randomly occurring polypeptide? If there was a base RNA, where did the nucleic acid concentration come from? Were there ribosomes involved?
This leads me to my next question:
And now proper organic machinery that can "eat" methane - turn it into the kind of crud that makes cells — apokrisis
-What type of crud? Hydrocarbon chain
Thanks for sharing these ideas with us all Apokrisis, if you're unable to answer the technical questions its no reflection on the theory, only that I personally would like more information.