Posts Tagged ‘bacteria’

Craig Venter

Thursday, March 20th, 2008

Bradley Fikes and I spent the afternoon at UCSD to hear Craig Venter speak. I was not disappointed. I wrote the first review on Amazon of his autobiography and he knew this today, commenting that it was the most credited as “helpful.” His accomplishments go well beyond medicine although that seems to be the part that fascinates reporters.

He discussed the sequencing of the genome but the most important part is the environmental potential of his work. For example, the methanobacteria are now properly known as Methanococci as they are now known to be a member of Archaea, a new kingdom of life. If you really want to know about Archaea,
this is the source
, although a PDF version can be downloaded and printed. These organisms can exist at the extremes of nature, such as steam vents on the ocean floor.

Some of them are capable of regenerating oil or natural gas from CO2. Some can metabolize coal in underground deposits and release methane gas. Some can metabolize sulfuric acid and release metallic sulfur and water. Some bacteria can generate nanowires and potentially function as a battery with electricity generation from animal waste.

Some of them will take up uranium and some may even be able to metabolize radioactive elements. Some may function as a bacterial fuel cell. Some of these fuel cells involve bacteria with nanowires. These systems are getting close to practical use.

The great advantage of all of these systems is that energy inputs are far less than the inorganic equivalent, such as burning or conversion to ethanol of plant substrate. The bacterial systems can convert the substrate directly to methane or a higher carbon molecule by enzyme action that takes place at ambient temperature.

Methane has one carbon. Ethane has two and octane, the ideal form of gasoline, has eight. These systems may be the way to refine tar sands or high sulfur crude oil that is not yet economical to use as fuel. Some of them will make fuel from waste. Some may even reduce nuclear waste to safe deposits that do not require isolation.

Right now, Venter is working on ways to analyze the genome of organisms with exotic properties and transfer the gene to more common or faster growing organisms. His company is called Synthetic Genomics. and is in southern California. He has other companies in the east but this application is more important, I think, than the medical applications right now. He calls it “digitizing life” and says that creating a synthetic chromosome is not difficult. The problem is “rebooting it.” He is about to announce an artificial bacterium and I thought the announcement might come today. It will be soon.

We’ll see what the next steps are.