1887

Abstract

., considered as emerging opportunistic pathogens, belong to the family . Among the criteria currently used for their classification is the presence of a single FeSOD (iron-containing superoxide dismutase), which distinguishes them from . In this paper the cloning of the and genes encoding two different SODs in ATCC 7966 is reported. The gene encoded an FeSOD (196 amino acids, 215 kDa), was constitutively expressed and showed 75% homology with the FeSOD. The gene encoded a protein of 206 amino acids (225 kDa) with MnSOD (manganese-containing SOD) activity and showed 55% homology with the MnSOD. The MnSOD of was detected only during the stationary phase of growth under high aeration or when induced by lack of iron. Nevertheless, paraquat had no detectable effect on its production. The amino-terminal part of the Mn-containing protein contained a putative signal sequence which could permit a periplasmic localization.

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2001-11-01
2019-10-14
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