Upon host (human neutrophil) infection interferes with productive FCAR signaling, inhibiting secreted IgA (SIgA) effector functions and probably avoiding neutrophil activation. Inhibits the SIgA-mediated oxidative burst by neutrophils, decreases generation of ROS (reactive oxygen species) by neutrophils and reduces chemotaxis by neutrophils, all of which are SIgA effector functions used to stimulate the immune response. Does not block SIgA-binding to its receptor (FCAR) on neutrophils, but it decreases SIgA-stimulated phosphorylation of cytoplasmic proteins, including phospholipase C-gamma and MAP kinases, all actions that may be advantageous to the pathogen.

490 amino acids

MKKSLLAVMLTGLFALVSLPALGNVNLEQLKQKAESGEAKAQLELGYRYFQGNETTKDLTQAMDWFRRAAEQGYTPAEYVLGLRYMNGEGVPQDYAQAVIWYKKAALKGLPQAQQNLGVMYHEGNGVKVDKAESVKWFRLAAEQGRDSGQQSMGDAYFEGDGVTRDYVMAREWYSKAAEQGNVWSCNQLGYMYSRGLGVERNDAISAQWYRKSATSGDELGQLHLADMYYFGIGVTQDYTQSRVLFSQSAEQGNSIAQFRLGYILEQGLAGAKEPLKALEWYRKSAEQGNSDGQYYLAHLYDKGAEGVAKNREQAISWYTKSAEQGDATAQANLGAIYFRLGSEEEHKKAVEWFRKAAAKGEKAAQFNLGNALLQGKGVKKDEQQAAIWMRKAAEQGLSAAQVQLGEIYYYGLGVERDYVQAWAWFDTASTNDMNLFGTENRNITEKKLTAKQLQQAELLSQQYIEKYAPEAWARMQKLKAQSAVKTGNK

54.8 kDa

(Note: Representative image - actual molecular weight may vary depending on tag type and expression method)

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