title: Examination of Haemophilus pleuropneumoniae for immunoglobulin A protease activity.
abstract: Haemophilus pleuropneumoniae, the etiological agent of porcine contagious pneumonia, was examined for the ability to produce an immunoglobulin A (IgA) protease specific for porcine IgA. No IgA protease activity against either porcine or human IgA was detected. Furthermore, no sequence homology was found between H. pleuropneumoniae chromosomal DNA and the gene which specifies IgA protease in Haemophilus influenzae.
mesh_terms: D000818:Animals; D004262:DNA Restriction Enzymes; D005796:Genes; D005798:Genes, Bacterial; D006190:Haemophilus / Q000201:enzymology* / Q000276:immunology; D007070:Immunoglobulin A; D009693:Nucleic Acid Hybridization; D010447:Peptide Hydrolases / Q000235:genetics / Q000378:metabolism*; D012697:Serine Endopeptidases; D013552:Swine
chemical_list: D007070:Immunoglobulin A; D004262:DNA Restriction Enzymes; D010447:Peptide Hydrolases; D012697:Serine Endopeptidases; C021433:IgA-specific serine endopeptidase