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beta-D-glucuronidase (BDG) activity of gram-negative bacteria
B Ralovich1, G A Ibrahim, A Fábián
1Hungarian Meat Research Institute, Budapest.
Acta Microbiologica Hungarica
|January 1, 1991
Summary
Beta-glucuronidase (BDG) enzyme activity, encoded by the uidA gene in Escherichia coli, is influenced by genetic factors and environmental conditions. Further examination of BDG activity across various bacterial genera is warranted.
Area of Science:
- Microbiology
- Enzymology
- Bacterial Genetics
Background:
- Beta-glucuronidase (BDG) is an inducible enzyme in Escherichia coli, encoded by the uidA gene.
- The uidA gene is conserved across most E. coli strains, but BDG phenotype expression varies.
- Lactose-induced catabolite repression and genetic mutations impact BDG activity.
Purpose of the Study:
- To investigate the prevalence and expression of BDG activity in various bacterial species.
- To understand the genetic and environmental factors influencing BDG enzyme activity.
Main Methods:
- Analysis of uidA gene presence in bacterial strains.
- Phenotypic assessment of BDG activity.
- Evaluation of factors like catabolite repression and genetic mutations.
Main Results:
- Most E. coli strains possess the uidA gene, but BDG activity is not universal.
- Salmonella, Shigella, and Yersinia strains commonly show positive BDG reactions.
- BDG activity in Edwardsiella, Serratia, Vibrio, and other genera remains largely unexamined.
Conclusions:
- The uidA gene is widespread, but BDG enzyme expression is tightly regulated.
- BDG activity is a useful marker in certain bacterial groups like Enterobacteriaceae.
- Further research is needed to characterize BDG activity in a broader range of bacterial genera.