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Periplasmic and membrane‐bound respiratory nitrate reductases in Thiosphaera pantotropha
Author(s) -
Bell Louise C.,
Richardson David J.,
Ferguson Stuart J.
Publication year - 1990
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(90)80889-q
Subject(s) - periplasmic space , chemistry , biochemistry , membrane , biophysics , biology , escherichia coli , gene
The unusual ability of Thiosphaera pantotropha to catalyze respiratory nitrate reduction under aerobic conditions is shown to correlate with the activity of a periplasmic nitrate reductase that is expressed under both aerobic and anaerobic growth conditions. The organism also synthesizes, but only under anaerobic conditions, a membrane‐bound nitrate reductase which resembles the corresponding enzyme in Paracoccus denitrificans in respect of both catalytic properties and inhibition of activity in intact cells in the presence of oxygen.