Anaerobic degradation of resorcinol (1,3-dihydroxybenzene) by Azoarcus anaerobius : biochemical aspects of the degradation pathway and identification of involved genes
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منابع مشابه
Heterologous expression and identification of the genes involved in anaerobic degradation of 1,3-dihydroxybenzene (resorcinol) in Azoarcus anaerobius.
Azoarcus anaerobius, a strictly anaerobic, gram-negative bacterium, utilizes resorcinol as a sole carbon and energy source with nitrate as an electron acceptor. Previously, we showed that resorcinol degradation by this bacterium is initiated by two oxidative steps, both catalyzed by membrane-associated enzymes that lead to the formation of hydroxyhydroquinone (HHQ; 1,2,4-benzenetriol) and 2-hyd...
متن کاملEvidence of two oxidative reaction steps initiating anaerobic degradation of resorcinol (1,3-dihydroxybenzene) by the denitrifying bacterium Azoarcus anaerobius.
The denitrifying bacterium Azoarcus anaerobius LuFRes1 grows anaerobically with resorcinol (1,3-dihydroxybenzene) as the sole source of carbon and energy. The anaerobic degradation of this compound was investigated in cell extracts. Resorcinol reductase, the key enzyme for resorcinol catabolism in fermenting bacteria, was not present in this organism. Instead, resorcinol was hydroxylated to hyd...
متن کاملIdentification of the Gene Cluster for the Anaerobic Degradation of 3,5-Dihydroxybenzoate (α-Resorcylate) in Thauera aromatica Strain AR-1.
Thauera aromatica strain AR-1 degrades 3,5-dihydroxybenzoate (3,5-DHB) with nitrate as an electron acceptor. Previous biochemical studies have shown that this strain converts 3,5-DHB to hydroxyhydroquinone (1,2,4-trihydroxybenzene) through water-dependent hydroxylation of the aromatic ring and subsequent decarboxylation, and they suggest a pathway homologous to that described for the anaerobic ...
متن کاملAzoarcus anaerobius sp. nov., a resorcinol-degrading, strictly anaerobic, denitrifying bacterium.
A strictly anaerobic, nitrate-reducing bacterium, strain LuFRes1, was isolated using resorcinol as sole source of carbon and energy. The strain reduced nitrate to dinitrogen gas and was not able to use oxygen as an alternative electron acceptor. Cells were catalase-negative but superoxide-dismutase-positive. Resorcinol was completely oxidized to CO2. 16S rRNA sequence analysis revealed a high s...
متن کاملMicrobial aspects of anaerobic BTEX degradation.
Combined with conventional methods, developments in both geochemical (delineation of redox processes) and molecular microbial methods (analysis of 16S rDNA genes and functional genes) have allowed us to study in details microorganisms and genes involved in the anaerobic degradation of benzene, toluene, ethylbenzene and xylene (BTEX) under specific redox conditions. This review summarizes recent...
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