Protocatechuate dioxygenase (PCD) catalyzes the proximal extradiol ring cleavage of protocatechuate (PCA) with attendant incorporation of both atoms of oxygen from O2.{15534} The PCD holoenzyme consists of α (23 kDa) and β (26.5 kDa) subunits, which form a tetramer with four ferric ions for a total weight of ~200 kDa.{15536} Iron is essential for activity because the substrate, PCA, initially binds directly to the iron through both hydroxyl groups to form a chelate complex.{15534} PCD is an important component of bacterial metabolism of aromatic compounds found in the soil. However, many publications are now reporting the usefulness of the PCD/PCA oxygen scrubbing (oxygen scavenging) system for maintaining anaerobic experimental conditions.{15535,15565} Cayman’s protocatechuate dioxygenase is the 3,4-PCD expressed and purified from a bacterial overexpression system. 3,4-PCD catalyzes the oxidative ring cleavage of 3,4-dihydroxybenzoate to produce β-carboxy-cis,cis-muconate. Activity of the PCD can be measured by monitoring the rate of O2 uptake with an oxygen electrode, or by measuring the amount of product (β-carboxy-cis,cis-muconate) formed at 290 nm.
产品描述
提供的原儿茶酸二加氧酶(100mg)产品形式为:A lyophilized powder from a solution of 20 mM potassium phosphate, pH 7.2, containing 100 mM sodium chloride.
产品形式
Protocatechuate dioxygenase (PCD) catalyzes the proximal extradiol ring cleavage of protocatechuate (PCA) with attendant incorporation of both atoms of oxygen from O2.{15534} The PCD holoenzyme consists of �� (23 kDa) and �� (26.5 kDa) subunits, which form a tetramer with four ferric ions for a total weight of ~200 kDa.{15536} Iron is essential for activity because the substrate, PCA, initially binds directly to the iron through both hydroxyl groups to form a chelate complex.{15534} PCD is an important component of bacterial metabolism of aromatic compounds found in the soil. However, many publications are now reporting the usefulness of the PCD/PCA oxygen scrubbing (oxygen scavenging) system for maintaining anaerobic experimental conditions.{15535,15565} Cayman��s protocatechuate dioxygenase is the 3,4-PCD expressed and purified from a bacterial overexpression system. 3,4-PCD catalyzes the oxidative ring cleavage of 3,4-dihydroxybenzoate to produce ��-carboxy-cis,cis-muconate. Activity of the PCD can be measured by monitoring the rate of O2 uptake with an oxygen electrode, or by measuring the amount of product (��-carboxy-cis,cis-muconate) formed at 290 nm.