4y25

Structural highlights

Function

[PGAA_ECOLI] Exports the biofilm adhesin polysaccharide poly-beta-1,6-N-acetyl-D-glucosamine (PGA) across the outer membrane. The PGA transported seems to be partially N-deacetylated since N-deacetylation of PGA by PgaB is needed for PGA export through the PgaA porin. Required for the synthesis of the beta-1,6-GlcNAc polysaccharide (PGA or poly-GlcNAc) that seems to serve as a biofilm adhesin.