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lipopolysaccharide transport periplasmic protein LptA Members of this protein family include LptA (previously called YhbN). It was shown to be an essential protein in E. coli, implicated in cell envelope integrity, and to play a role in the delivery of LPS to the outer leaflet of the outer membrane. It works with LptB (formerly yhbG), a homolog of ABC transporter ATP-binding proteins, encoded by an adjacent gene. Numerous homologs in other Proteobacteria are found in a conserved location near lipopolysaccharide inner core biosynthesis genes. This family is related to organic solvent tolerance protein (OstA), though distantly. [Cell envelope, Biosynthesis and degradation of surface polysaccharides and lipopolysaccharides, Transport and binding proteins, Other]
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Jiyao W et al.(2023). "The conserved domain database in 2023.",