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The systematic name of this enzyme class is benzene,NADH:oxygen oxidoreductase (1,2-hydroxylating). Other names in common use include benzene hydroxylase , and benzene dioxygenase . Biological role
The catechol dioxygenases, some of the most well-studied dioxygenase enzymes, use dioxygen to cleave a carbon-carbon bond of an aromatic catechol ring system. [4] Catechol dioxygenases are further classified as being “extradiol” or “intradiol,” and this distinction is based on mechanistic differences in the reactions (figures 1 & 2).
Aromatic-ring-hydroxylating dioxygenases (ARHD) incorporate two atoms of dioxygen (O 2) into their substrates in the dihydroxylation reaction.The product is (substituted) cis-1,2-dihydroxycyclohexadiene, which is subsequently converted to (substituted) benzene glycol by a cis-diol dehydrogenase.
Catechol dioxygenases are metalloprotein enzymes that carry out the oxidative cleavage of catechols.This class of enzymes incorporate dioxygen into the substrate.Catechol dioxygenases belong to the class of oxidoreductases and have several different substrate specificities, including catechol 1,2-dioxygenase (EC 1.13.11.1), catechol 2,3-dioxygenase (EC 1.13.11.2), and protocatechuate 3,4 ...
Thus, the two substrates of this enzyme are 2,3-dihydroxybenzoate and O 2, whereas its product is 2-carboxy-cis,cis-muconate. This enzyme belongs to the family of oxidoreductases , specifically those acting on single donors with O 2 as oxidant and incorporation of two atoms of oxygen into the substrate (oxygenases).
In enzymology, a protocatechuate 3,4-dioxygenase (EC 1.13.11.3) is an enzyme that catalyzes the chemical reaction. 3,4-dihydroxybenzoate + O 2 3-carboxy-cis,cis-muconate. Thus, the two substrates of this enzyme are 3,4-dihydroxybenzoate (protocatechuic acid) and O 2, whereas its product is 3-carboxy-cis,cis-muconate.
This enzyme belongs to the family of oxidoreductases, specifically those acting on single donors with O 2 as oxidant and incorporation of two atoms of oxygen into the substrate (oxygenases). The oxygen incorporated need not be derived from O 2. The systematic name of this enzyme class is benzene-1,2,4-triol:oxygen 1,2-oxidoreductase (decyclizing).
Any part of the plant may induce side effects, but the bulb is the most toxic. At higher amounts, the toxin can cause gastrointestinal problems or a drop in blood pressure. Tulips come in a variety of colors. Tulip. Any part of the tulip [25] can be poisonous but the bulb is the most toxic causing irritation in the mouth and throat. Signs of ...