Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:3.2.1.36 (hyaluronidase)
 4,606 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Immunoglobulin A1 (IgA1) proteases may be important virulence factors of certain bacteria involved in the pathogenesis of meningitis, gonorrhea, destructive periodontal diseases, and some other infections affecting mucosal membranes. This study evaluated the antigen-binding activity of free Fab alpha fragments released from human myeloma IgA1 by IgA1 protease from Haemophilus influenzae. Six myeloma proteins with antibody activity against streptolysin O, alpha-staphylolysin, or streptococcal hyaluronidase were used. Complete cleavage of the IgA1 myeloma proteins in the hinge region of the heavy chain did not affect their antigen-binding capacity. The titers of neutralizing activity associated with free Fab alpha fragments were not significantly different from those of the intact IgA1 proteins. The retained antigen-binding capacity of cleaved IgA1 is an important factor in the understanding of how IgA1 proteases may interfere with the immune protection of mucosal membranes.
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PMID:Retained antigen-binding activity of Fab alpha fragments of human monoclonal immunoglobulin A1 (IgA1) cleaved by IgA1 protease. 351 53

For many years the virulence of Streptococcus pneumoniae has largely been attributed to its antiphagocytic polysaccharide capsule. Recent evidence, however, indicates that certain pneumococcal proteins play an important part in the pathogenesis of disease, either as mediators of inflammation or by directly attacking host tissues. Pneumococci carrying defined mutations in the genes encoding any one of at least three pneumococcal proteins (the toxin pneumolysin, the major pneumococcal autolysin, and pneumococcal surface protein A) have significantly reduced virulence. Pneumococcal hydrolytic enzymes, such as neuraminidase, hyaluronidase, and IgA1 protease may also contribute to colonization and/or invasion of the host. Several of these proteins (or their detoxified derivatives) are protective immunogens in animal models and therefore warrant consideration for inclusion in human antipneumococcal vaccine formulations.
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PMID:Molecular analysis of the pathogenicity of Streptococcus pneumoniae: the role of pneumococcal proteins. 790 33