A Protein Export Pathway Involving Escherichia coli Porins
نویسندگان
چکیده
منابع مشابه
The TolB protein interacts with the porins of Escherichia coli.
TolB is a periplasmic protein of the cell envelope Tol complex. It is partially membrane associated through an interaction with the outer membrane lipoprotein PAL (peptidoglycan-associated lipoprotein), which also belongs to the Tol system. The interaction of TolB with outer membrane porins of Escherichia coli was investigated with a purified TolB derivative harboring a six-histidine tag. TolB ...
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Overexpression of either heterologous or homologous proteins that are routed to the periplasm via the twin-arginine translocation (Tat) pathway results in a block of export and concomitant accumulation of the respective protein precursor in the cytoplasm. Screening of a plasmid-encoded genomic library for mutants that confer enhanced export of a TorA signal sequence (ssTorA)-GFP-SsrA fusion pro...
متن کاملProtein export in Escherichia coli requires a soluble activity.
By using a reconstituted cell-free system we have demonstrated the existence of a soluble activity that is required for the export of proteins in Escherichia coli. This export factor sediments at about 12 S. It has been partially purified by passage through an omega-NH2-butylagarose column and by salt elution off a DEAE matrix. The export factor does not contain 6S RNA.
متن کاملThe LptA protein of Escherichia coli is a periplasmic lipid A-binding protein involved in the lipopolysaccharide export pathway.
The LptA protein of Escherichia coli has been implicated in the transport of lipopolysaccharide (LPS) from the inner membrane to the outer membrane. Here we provide evidence that LptA binds structurally diverse LPS substrates in vitro and demonstrate that it interacts specifically with the lipid A domain of LPS. These results are consistent with LptA playing a chaperone role in the transport of...
متن کاملInvolvement of membrane lipids in protein export in Escherichia coli.
Several models for the transport of proteins across membranes predict a role for lipids. If these models are correct, then alterations in lipid metabolism may affect protein export and vice versa. We are investigating this possibility by studying Escherichia coli K-12 mutants with defects in protein export or phospholipid metabolism. A temperature-sensitive secA mutant, which is defective in pr...
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ژورنال
عنوان ژورنال: Structure
سال: 2012
ISSN: 0969-2126
DOI: 10.1016/j.str.2012.04.014