PMID: 7893816Jan 1, 1994Paper

Pseudomonas aeruginosa nitrite reductase (or cytochrome oxidase): an overview

M C SilvestriniM Brunori


The biochemistry and molecular biology of nitrite reductase, a key enzyme in the dissimilatory denitrification pathway of Ps aeruginosa which reduces nitrite to NO, is reviewed in this paper. The enzyme is a non-covalent homodimer, each subunit containing one heme c and one heme d1. The reaction mechanisms of nitrite and oxygen reduction are discussed in detail, as well as the interaction of the enzyme with its macromolecular substrates, azurin and cytochrome c551. Special attention is paid to new structural information, such as the chemistry of the d1 prosthetic group and the primary sequence of the gene and the protein. Finally, results on the expression both in Ps aeruginosa and in heterologous systems are presented.


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