Abstract
Exoenzyme S was purified > 1,500-fold from the culture supernatant fluid of Pseudomonas aeruginosa 388 at high yield without utilization of solvents or detergents. Two proteins, with apparent molecular sizes of 53 and 49 kDa, cofractionated with exoenzyme S activity. Rabbit anti-49-kDa-protein immunoglobulin G was prepared by using sodium dodecyl sulfate-polyacrylamide gel electrophoresis-purified 49-kDa protein as immunogen. Anti-49-kDa-protein IgG inhibited the ADP-ribosyltransferase activity of purified exoenzyme S in a dose-dependent manner, which indicated a role for the 49-kDa protein in the ADP-ribosylation reaction. Analysis by ultrafiltration showed that exoenzyme S activity and the 53- and 49-kDa proteins cofractionated and that exoenzyme S was apparently > 300 kDa in size. Urea (8 M) and 1.0% Triton X-100 reversibly decreased the apparent molecular sizes of exoenzyme S activity and the 53- and 49-kDa proteins to between 30 and 100 kDa.
MeSH Terms
ADP Ribose Transferases
Amino Acids/analysis
Animals
Antibody Specificity
Bacterial Toxins
Blotting, Western
Chromatography, Ion Exchange
Dose-Response Relationship, Immunologic
Electrophoresis, Polyacrylamide Gel
Immunoglobulin G/pharmacology
Mice
Octoxynol
Poly(ADP-ribose) Polymerases/chemistry,isolation & purification,metabolism
Polyethylene Glycols/pharmacology
Pseudomonas aeruginosa/enzymology
Ultrafiltration
Urea/pharmacology
Chemicals
Amino Acids
Bacterial Toxins
Immunoglobulin G
Polyethylene Glycols
Urea
Octoxynol
ADP Ribose Transferases
Poly(ADP-ribose) Polymerases
exoenzyme S
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Kulich S M
Department of Microbiology, Medical College of Wisconsin, Milwaukee 53226.
Frank D W
Barbieri J T
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