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The effects of two single-point cavity-forming mutations, F110S and I7S, on the internal dynamics of azurin from Pseudomonas aeruginosa were probed by the phosphorescence emission of Trp-48, deeply buried in the compact hydrophobic core of the macromolecule. Changes in flexibility of the protein matrix around the chromophore were monitored by the intrinsic phosphorescence lifetime (τ0) whereas more...
Time-resolved fluorescence and time resolved fluorescence anisotropy studies have been performed on wild-type azurin from Pseudomonas aeruginosa and two variants to study the mobility of Trp48. The two azurin variants in which the microenvironment of Trp48 was changed comprised the single mutations Ile7Ser and Phe110Ser. The experiments were performed on the holo-Cu(I), holo-Cu(II), and apo- forms...
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