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Betaine aldehyde dehydrogenase from the human opportunistic pathogen Pseudomonas aeruginosa (PaBADH) catalyzes the irreversible, NAD(P) + -dependent oxidation of betaine aldehyde, producing glycine betaine, an osmoprotectant. PaBADH participates in the catabolism of choline and likely in the defense against the osmotic and oxidative stresses to which the bacterium is exposed when infecting...
Betaine aldehyde dehydrogenase (BADH) from the human pathogen Pseudomonas aeruginosa is a tetrameric enzyme that contains a catalytic Cys286 and three additional cysteine residues, Cys353, 377, and 439, per subunit. In the present study, we have investigated the role of the three non-essentials in enzyme activity and stability by homology modeling and site-directed mutagenesis. Cys353 and Cys377 are...
Purified catalase-1 (CAT-1) from Neurospora crassa asexual spores is oxidized by singlet oxygen giving rise to active enzyme forms with different electrophoretic mobility. These enzyme forms are detected in vivo under stress conditions and during development at the start of the asexual morphogenetic transitions. CAT-1 heme b is oxidized to heme d by singlet oxygen. Here, we describe functional and...
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