Two glucose transport systems in Bacillus licheniformis

Two glucose transport systems in Bacillus licheniformis.

Bacillus licheniformis NCIB 6346 showed active accumulation of glucose which was inhibited by agents which affect the transmembrane proton gradient. Phosphotransferase (PTS) activity, identified as phosphoenolpyruvate-dependent phosphorylation of glucose, was found in cell extracts but could not be demonstrated in cells permeabilized with toluene when assays were conducted at pH 6.6. The same w...

Regulation of alanine dehydrogenase in Bacillus (licheniformis).

Cell extracts of Bacillus licheniformis were found to contain nicotinamide adenine dinucleotide (NAD)-dependent l-alanine dehydrogenase (ADH) (l-alanine: NAD oxidoreductase, EC 1.4.1.1). High specific activities (3.5 to 6.0 IU/mg of protein) were found in extracts of cells throughout growth cycles only when l-alanine served as the primary source of carbon or carbon and nitrogen. Specific activi...

Glucose induces two amino acid transport systems in Chlorella.

In autotrophically grown Chlorella cells, glucose induces a hexose transport system but, at the same time, the synthesis of two amino acid transport systems is also induced. Thus, the rates of uptake of glycine, L-alanine, L-proline, and L-serine, all of which compete with each other for entry into the cells, increase more than 100-fold when the algae are pretreated with glucose. The rates of L...

A mechanism for penicillinasesecretion in Bacillus licheniformis.

Cell-bound isozymes of penicillinase are distinguished from extracellular enzyme by their capacity to bind deoxycholate and to elute with an apparent molecular weight of 45,000 on gel filtration in its presence. By methods that are unlikely to involve changes in primary structure, the cell-bound forms (both from the plasma membrane and from the periplasmic vesicles) can be converted to forms th...

Energetics and motility in Bacillus licheniformis.