NarJ is a specific chaperone required for molybdenum cofactor assembly in nitrate reductase A of Escherichia coli.

@article{Blasco1998NarJIA,
  title={NarJ is a specific chaperone required for molybdenum cofactor assembly in nitrate reductase A of Escherichia coli.},
  author={F. Blasco and Janaina Patr{\'i}cia dos Santos and Axel Magalon and Chantal Frixon and Bruno Guigliarelli and C L Santini and G{\'e}rard Giordano},
  journal={Molecular microbiology},
  year={1998},
  volume={28 3},
  pages={
          435-47
        }
}
The formation of active membrane-bound nitrate reductase A in Escherichia coli requires the presence of three subunits, NarG, NarH and NarI, as well as a fourth protein, NarJ, that is not part of the active nitrate reductase. In narJ strains, both NarG and NarH subunits are associated in an unstable and inactive NarGH complex. A significant activation of this complex was observed in vitro after adding purified NarJ-6His polypeptide to the cell supernatant of a narJ strain. Once the apo-enzyme… CONTINUE READING

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