June 13, 2024

Microbe opens the door to carbon-dioxide driven manufacturing.

We have discovered a new microbe that may offer insights into the origins of life on Earth, the search for extraterrestrial life, and microbial manufacturing. Found in the extreme environment of The Cedars in northern California, this microorganism, called Met12, converts carbon dioxide into acetate using a previously unknown metabolic pathway. Unlike its relatives, it does not produce methane but instead relies on a unique gene, MmcX, to enhance electron uptake and facilitate energy metabolism.
This discovery suggests that early life on Earth may have used similar processes to survive in harsh conditions. Met12’s ability to thrive in an inhospitable environment could also provide clues about life on other planets. We initially doubted their findings, but through synthetic biology techniques, we confirmed the microbe’s existence and metabolic function.
Beyond its implications for understanding life’s origins, this research has practical applications. The MmcX gene could improve biofuel production and microbial carbon sequestration, helping to address climate change. We are now exploring other extreme environments, such as Japan’s hot springs and the Mariana Trench, to uncover more unique microbes and genes with potential biotechnological applications.

RIKEN Press release "Microbe opens the door to carbon-dioxide driven manufacturing"