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Dsb proteins control the formation and rearrangement of disulfide bonds during the folding of membrane and exported proteins. DsbA is an oxidant that catalyzes formation of disulfide bonds in newly synthesized, and yet unfolded proteins. In order to act catalytically again, it has to be reoxidized by a transmembrane protein DsbB characterized by two pairs of disulfides. DsbB is related to another...
Campylobacte is an asaccharolytic microorganism which uses amino acids as a source of carbon and energy. CjaC/HisJ is a ligand-binding protein, a component of the ABC transport system. Campylobacter CjaC/HisJ is post-translationally modified by glycosylation. The number of glycosylation motifs present in the CjaC protein is species-specific. C. coli CjaC has two and C. jejuni one motif (E/DXNYS/T)...
We investigated the regulation of the cjaA and cjaB genes of Campylobacter coll. These genes are seemingly arranged into one operon but appear to encode functionally different proteins i.e. an extracytoplasmic solute receptor and a MHS - metabolite: H⁺ symporter transport protein. Analysis of various transcriptional cjaA and/or cjaB lacZ fusion constructs revealed that both genes are arranged in an...
Immunogenic C. coli CjaA protein is a candidate for a chicken anti-Campylobacter subunit vaccine. In order to enhance its immunogenicity an antigenic determinant of the CjaA protein was identified. Thereafter, two copies of the antigenic epitope were cloned in tandem directly or with a flexible hinge between them. All experiments documented that the CjaA protein contained not only linear antigenic...
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