1H, 13C and 15N resonance assignment of the N-terminal domain of PilB from Neisseria meningitidis

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Solution structure and dynamics of the reduced and oxidized forms of the N-terminal domain of PilB from Neisseria meningitidis.

International audienceThe secreted form of the PilB protein was proposed to be involved in pathogen survival fighting against the defensive host's oxidative burst. PilB protein is composed of three domains. The central and the C-terminal domains display methionine sulfoxide reductase A and B activities, respectively. The N-terminal domain, which possesses a CXXC motif, was recently shown to regenerate in vitro the reduced forms of the methionine sulfoxide reductase domains of PilB from their oxidized forms, as does the thioredoxin 1 from E. coli, via a disulfide bond exchange. The thioredoxin-like N-terminal domain belongs to the cytochrome maturation protein structural family, but it possesses a unique additional segment (99)FLHE (102) localized in a loop. This segment covers one edge of the active site in the crystal structure of the reduced form of the N-terminal domain of PilB. We have determined the solution structure and the dynamics of the N-terminal domain from Neisseria meningitidis, in its reduced and oxidized forms. The FLHE loop adopts, in both redox states, a well-defined conformation. Subtle conformational and dynamic changes upon oxidation are highlighted around the active site, as well as in the FLHE loop. The functional consequences of the cytochrome maturation protein topology and those of the presence of FLHE loop are discussed in relation to the enzymatic properties of the N-terminal domain

1H, 13C and 15N resonance assignment of the oxidized form (Cys(67)-Cys (70)) of the N-terminal domain of PilB from Neisseria meningitidis

International audienceWe report the nearly complete 1H, 13C and 15N resonance assignments of the oxidized form (Cys(67)-Cys(70)) of the N-terminal domain of PilB from Neisseria meningitidis. Secondary structure determination using CSI method and TALOS leads mainly to the prediction of 7 alpha-helical and 5 beta-sheet parts

1H, 13C, and 15N resonance assignment of the C103S mutant of the N-terminal domain of DsbD from Neisseria meningitidis.

International audienceWe report the nearly complete 1H, 13C, and 15N resonance assignments of the C103S mutant of the N-terminal domain of DsbD from Neisseria meningitides. Secondary structure determination using CSI method leads to the prediction of nine beta-sheet parts