Glucose transport in stationary-phase cultures of an asporogenous strain of Bacillus licheniformis

Article Abstract:

Bacillus licheniformis mutant cells in the late-stationary growth phase transport glucose by the phosphotransferase system (PTS). The mutant cells are unable to express the sporulation genes. The transport is unaffected by an increase in the concentration of the glucose analogue 2-deoxyglucose. Tetrachlorosalicylanilide which inhibits the proton gradient required for the non-PTS mechanism has no effect on the transport. The non-PTS system is active during the early growth phases and later becomes inactive. This is probably due to transport regulation by the cell.

Biological transport

Extracellular enzyme synthesis in a sporulation-deficient strain of Bacillus licheniformis

Article Abstract:

Asporogenous spoIIAC deficient Bacillus (B.) licheniformis can be generated in vitro by gene splicing and overlap extension without affecting extracellular enzyme synthesis. Synthesis of DNase, RNase, Serine protease, polygalactouonate lyase, and xylanase was unaffected but alpha-amylase yield was low in the mutant strain than in a wild-type strain. This may be due to the partial replacement of the amylase sigma factor by sporulation sigma factor.

Genetic aspects, Genetic engineering, Enzymes, Spores (Bacteria), Bacterial spores, Chromosome deletion, Enzyme synthesis

Regulation of polyglutamic acid synthesis by glutamate in Bacillus licheniformis and Bacillus subtilis

Article Abstract:

Glutamate could be used to suppress slime production in industrial fermentations that use Bacillus licheniformis. Glutamate appears to regulate polyglutamic acid synthesis in B. licheniformis but not in B. subtilis.

Glutamate, Industrial microorganisms