Loss of specificity variants of WzxC suggest that substrate recognition is coupled with transporter opening in MOP-family flippases.

Abstract excerpt

Bacteria produce a variety of surface-exposed polysaccharides important for cell integrity, biofilm formation and evasion of the host immune response. Synthesis of these polymers often involves the assembly of monomer oligosaccharide units on the lipid carrier undecaprenyl-phosphate at the inner face of the cytoplasmic membrane. For many polymers, including cell wall peptidoglycan, the lipid-linked precursors...

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