Mutants of able to sporulate in the presence of 1% (w/v) glucose have been isolated. A single mutation, , is responsible for this phenotype. One of the mutants, A-20, was characterized biochemically. The mutants had generation times similar to that of the parental strain when growing with glucose or ethanol as carbon source, and on sporulation medium in the absence of glucose they behaved like the wild-type. In contrast, in the presence of glucose, mutant A-20 raised the pH of the medium and degraded glycogen after an initial period of accumulation. This behaviour was not observed in the wild-type. cAMP concentration increased in the mutant after addition of glucose, although to a lesser extent than in the parent. A marked difference between the mutant and the wild-type was the slow utilization of glucose by the mutant when placed in sporulation medium. In addition, in sporulation medium, the glucose uptake system was inactivated with different kinetics in the mutant compared with the wild-type. The mutation seems therefore to affect the glucose uptake system.


Article metrics loading...

Loading full text...

Full text loading...


Most cited this month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error