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This review analyzes the currently available data on true and purported FeMn enzymes with a particular emphasis on their specific physical properties. The characterization of the purple acid phosphatase from sweet potato and the current view of the hydrolysis mechanism are presented. The controversy associated with the discovery of the class Ic ribonucleotide reductase from Chlamydia trachomatis is...
Yellow lupin diphosphonucleotide phosphatase/phosphodiesterase (PPD1) represents a novel group of enzymes. Here we report that it possesses one iron atom and one manganese atom (1:1 molar ratio) per subunit. The enzyme exhibits visible absorption maximum at ∼530nm. Prolonged oxidation of PPD1 leads to loss of the charge-transfer band and catalytic activity, whereas after reduction PPD1 remains active...
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