Journal
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
Volume 51, Issue 1, Pages 215-222Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/AAC.00706-06
Keywords
-
Categories
Ask authors/readers for more resources
The poly-gamma-D-glutamic acid capsule confers antiphagocytic properties on Bacillus anthracis and is essential for virulence. In this study, we showed that Capl), a -gamma-polyglutamic acid depolymerase encoded on the B. anthracis capsule plasmid, degraded purified capsule and removed the capsule from the surface of anthrax bacilli. Treatment with CapD induced macrophage phagocytosis of encapsulated B. anthracis and enabled human neutrophils to kill encapsulated organisms. A second glutamylase, PghP, a gamma-polyglutamic acid hydrolase encoded by Bacillus subtilis bacteriophage Phi NIT1, had minimal activity in degrading B. anthracis capsule, no effect on macrophage phagocytosis, and only minimal enhancement of neutrophil killing. Thus, the levels of both phagocytosis and killing corresponded to the degree of enzyme-mediated capsule degradation. The use of enzymes to degrade the capsule and enable phagocytic killing of B. anthracis offers a new approach to the therapy of anthrax.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available