[The PQQ-dehydrogenases. A novel example of bacterial quinoproteins].
REVISTA LATINOAMERICANA DE MICROBIOLOGIA 2004;
46:47-59. [PMID:
17061524]
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Abstract
The word "quinoprotein" describes four groups of different enzymes which have cofactors containing o-quinones. Pyrrolo-quinoline quinone (PQQ) is not covalently attached. PQQ is the cofactor of several quinoprotein bacterial dehydrogenases including glucose dehydrogenase (G-DH), alcohol dehydrogenase (A-DH) and aldehyde dehydrogenase (AL-DH). These dehydrogenases are located in the periplasm of Gram-negative bacteria. This report summarises the structural properties of quinoprotein dehydrogenases, such as the biological functions and biotechnological aspects more important.
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