The translocation of proteins from one compartment to another is an essential feature of cellular life. The proper functioning of extracytoplasmic proteins requires their export to, and productive folding in, the correct cellular compartment. Gram-negative bacteria secrete a wide range of proteins whose function includes biogenesis of organelles, such as Pili and flagella; nutrient acquisition; virulence; and efflux of drugs and other toxins. Export of these proteins to the bacterial surface involves transport across ...
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