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Nickel enzymes, present in archaea, bacteria, plants, and primitive eukaryotes are divided into redox and nonredox enzymes and play key functions in diverse metabolic processes, such as energy metabolism and virulence. They catalyze various reactions by using active sites of diverse complexities, such as mononuclear nickel in Ni‐superoxide dismutase, glyoxylase I and acireductone dioxygenase, dinuclear...
In Rhodospirillum rubrum, the maturation of carbon monoxide dehydrogenase (CODH) requires three nickel chaperones, namely RrCooC, RrCooT and RrCooJ. Recently, the biophysical characterisation of the RrCooT homodimer and the X‐ray structure of its apo form revealed the existence of a solvent‐exposed NiII‐binding site at the dimer interface, involving the strictly conserved Cys2. Here, a multifaceted...
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