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PgaA membrane beta barrel domain
poly-beta-1,6 N-acetyl-D-glucosamine export porin PgaA
poly-beta-1,6 N-acetyl-D-glucosamine export porin PgaA exports the biofilm adhesin polysaccharide poly-beta-1,6-N-acetyl-D-glucosamine (PGA) across the outer membrane
Members of this protein family are the poly-beta-1,6 N-acetyl-D-glucosamine (PGA) export porin PgaA of Gram-negative bacteria. There is no counterpart in the poly-beta-1,6 N-acetyl-D-glucosamine biosynthesis systems of Gram-positive bacteria such as Staphylococcus epidermidis. The PGA polysaccharide adhesin is a critical determinant of biofilm formation. The conserved C-terminal domain of this outer membrane protein is preceded by a variable number of TPR repeats.
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