Anaerobic bacteria can convert hydrogen and CO2 to formic acid

Contra the Global Warming Hoax and Climate Change Religion propaganda and demagoguery! Human ingenuity can easily handle any carbon dioxide in the atmosphere!

Apparently, these anaerobic bacteria can convert hydrogen and CO2 to formic acid. This solution would solve two issues at the same time: hydrogen storage and CO2 removal.

One of the authors of the research article below has actually authored a series of articles on the same bacteria and its amazing capabilities.

From the abstract:

"Filamentous enzymes have been found in all domains of life, but the advantage of filamentation is often elusive. Some anaerobic, autotrophic bacteria have an unusual filamentous enzyme for CO2 fixation—hydrogen-dependent CO2 reductase (HDCR)2,3—which directly converts H2 and CO2 into formic acid. HDCR reduces CO2 with a higher activity than any other known biological or chemical catalyst, and it has therefore gained considerable interest in two areas of global relevance: hydrogen storage and combating climate change by capturing atmospheric CO2. However, the mechanistic basis of the high catalytic turnover rate of HDCR has remained unknown. Here we use cryo-electron microscopy to reveal the structure of a short HDCR filament from the acetogenic bacterium Thermoanaerobacter kivui. The minimum repeating unit is a hexamer that consists of a formate dehydrogenase (FdhF) and two hydrogenases (HydA2) bound around a central core of hydrogenase Fe-S subunits, one HycB3 and two HycB4. These small bacterial polyferredoxin-like proteins oligomerize through their C-terminal helices to form the backbone of the filament. By combining structure-directed mutagenesis with enzymatic analysis, we show that filamentation and rapid electron transfer through the filament enhance the activity of HDCR. To investigate the structure of HDCR in situ, we imaged T. kivui cells with cryo-electron tomography and found that HDCR filaments bundle into large ring-shaped superstructures attached to the plasma membrane. This supramolecular organization may further enhance the stability and connectivity of HDCR to form a specialized metabolic subcompartment within the cell."

Bakterien wandeln Kohlendioxid und Wasserstoff in Ameisensäure um Wärmeliebende Bakterien nutzen CO₂ und molekularen Wasserstoff als Energiequelle – und bilden daraus Ameisensäure. Forschern ist es nun gelungen, die molekularen Details dieses biotechnologisch aussichtsreichen Prozesses zu entschlüsseln.

Membrane-anchored HDCR nanowires drive hydrogen-powered CO2 fixation (no public access, but article above contains link to PDF file)

Biological hydrogen storage and release through multiple cycles of bi-directional hydrogenation of CO2 to formic acid in a single process unit (no public access)