Tryptophanase in Diverse Bacterial Species

Tryptophanase in diverse bacterial species.

The distribution of tryptophanase was studied. The highest observed specific activity, mumoles per minute per milligram (dry weight) cells, is given in parentheses after each species. Tryptophanase was inducible and repressible in Escherichia coli (.914), Paracolobactrum coliforme (.210), Proteus vulgaris (.146), Aeromonas liquefaciens (.030), Photobacterium harveyi (.035), Sphaerophorus varius...

Synthetic riboswitches that induce gene expression in diverse bacterial species.

We developed a series of ligand-inducible riboswitches that control gene expression in diverse species of Gram-negative and Gram-positive bacteria, including human pathogens that have few or no previously reported inducible expression systems. We anticipate that these riboswitches will be useful tools for genetic studies in a wide range of bacteria.

Bacterial Disease in Diverse Hosts

teria, often in response to contacting host cells or host Department of Biochemistry and Molecular Biology factors (often called “contact-mediated” secretion) (reDepartment of Microbiology and Immunology viewed by Hueck, 1998). Remarkably, type III systems University of British Columbia also transport specific virulence factors directly into Vancouver, British Columbia host cells, acting as a s...

Diverse bacterial microcompartment organelles.

Bacterial microcompartments (MCPs) are sophisticated protein-based organelles used to optimize metabolic pathways. They consist of metabolic enzymes encapsulated within a protein shell, which creates an ideal environment for catalysis and facilitates the channeling of toxic/volatile intermediates to downstream enzymes. The metabolic processes that require MCPs are diverse and widely distributed...

Comparative Study of L-asparaginase Activity in Different Bacterial Species