The invention provides methods for improving efficiency of fermentation by arginine supplementation, and genetically modified bacterium for use therefor. More particularly the invention provides methods for (i) increasing the production ATP intensive products with arginine supplementation, (ii) increasing utilization of arginine by a C1-fixing bacterium; and (iii) providing C1-fixing bacterium with optimized arginine de-aminase pathways.

Disclosed herein are bacteria engineered to treat diseases associated with hyperammonemia and methods of use thereof. Specifically, the bacteria are engineered to comprise a racemase to enable the detection of non-naturally occurring metabolites as an indication that the engineered bacteria are effectively converting ammonia.

The invention provides methods for improving efficiency of fermentation by arginine supplementation, and genetically modified bacterium for use therefor. More particularly the invention provides methods for (i) increasing the production ATP intensive products with arginine supplementation, (ii) increasing utilization of arginine by a C1-fixing bacterium; and (iii) providing C1-fixing bacterium with optimized arginine de-aminase pathways.

The invention provides methods for improving efficiency of fermentation by arginine supplementation, and genetically modified bacterium for use therefor. More particularly the invention provides methods for (i) increasing the production ATP intensive products with arginine supplementation, (ii) increasing utilization of arginine by a C1-fixing bacterium; and (iii) providing C1-fixing bacterium with optimized arginine de-aminase pathways.