Differential expression of the cytotoxic and hemolytic activities of the ApxIIA toxin from Actinobacillus pleuropneumoniae.
The ApxIIA protein secreted from Actinobacillus pleuropneumoniae is both hemolytic and cytotoxic. However, when the cloned apxII operon is expressed in Escherichia coli, two forms of the ApxIIA protein can be recovered. Toxin which remains intracellular has hemolytic and cytotoxic activities, while toxin that is secreted is cytotoxic with little or no hemolytic activity. This indicates that the cytotoxicity of ApxIIA is independent of its hemolytic activity.
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Department of Medical Biochemistry and Genetics, Texas A&M Health Science Center, College of Medicine, College Station 77843-1114.
Hausler
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Young
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Struck
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D016977:Actinobacillus pleuropneumoniae / Q000472:pathogenicity*; D000818:Animals; D001426:Bacterial Proteins / Q000032:analysis* / Q000235:genetics; D001427:Bacterial Toxins / Q000032:analysis*; D002417:Cattle; D003603:Cytotoxins / Q000032:analysis*; D004926:Escherichia coli / Q000235:genetics; D006460:Hemolysin Proteins / Q000032:analysis*
C085361:ApxII toxin, bacteria; D001426:Bacterial Proteins; D001427:Bacterial Toxins; D003603:Cytotoxins; D006460:Hemolysin Proteins