ID 3.4.21.72 DE IgA-specific serine endopeptidase. AN IgA protease. AN immunoglobulin A1 protease. CA Cleavage of immunoglobulin A molecules at certain Pro-|-Xaa bonds in the CA hinge region. No small molecule substrates are known. CC -!- Species variants differing slightly in specificity are secreted by CC Gram-negative bacteria Neisseria gonorrhoeae and Haemophilus CC influenzae. CC -!- Some other bacterial endopeptidases with similar specificity are of CC metallotype (see EC 3.4.24.13). CC -!- Belongs to peptidase family S6. DR P44969, IGA0_HAEIN ; P42782, IGA1_HAEIF ; P45384, IGA2_HAEIF ; DR P45385, IGA3_HAEIF ; P45386, IGA4_HAEIF ; P09790, IGA_NEIGO ; //