Phosphoribosyl-ATP diphosphatase

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phosphoribosyl-ATP diphosphatase
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phosphoribosyl-ATP pyrophosphatase tetramer, Streptomyces coelicolor
Identifiers
EC no. 3.6.1.31
CAS no. 69553-55-5
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In enzymology, a phosphoribosyl-ATP diphosphatase (EC 3.6.1.31) is an enzyme that catalyzes the chemical reaction

1-(5-phosphoribosyl)-ATP + H2O 1-(5-phosphoribosyl)-AMP + diphosphate

Thus, the two substrates of this enzyme are 1-(5-phosphoribosyl)-ATP and H2O, whereas its two products are 1-(5-phosphoribosyl)-AMP and diphosphate.

This enzyme participates in histidine metabolism. It employs one cofactor, H+.

Nomenclature

This enzyme belongs to the family of hydrolases, specifically those acting on acid anhydrides in phosphorus-containing anhydrides. The systematic name of this enzyme class is 1-(5-phosphoribosyl)-ATP diphosphohydrolase. Other names in common use include phosphoribosyl-ATP pyrophosphatase, and phosphoribosyladenosine triphosphate pyrophosphatase.

Related Research Articles

<span class="mw-page-title-main">Pyrophosphate</span> Class of chemical compounds

In chemistry, pyrophosphates are phosphorus oxyanions that contain two phosphorus atoms in a P–O–P linkage. A number of pyrophosphate salts exist, such as disodium pyrophosphate (Na2H2P2O7) and tetrasodium pyrophosphate (Na4P2O7), among others. Often pyrophosphates are called diphosphates. The parent pyrophosphates are derived from partial or complete neutralization of pyrophosphoric acid. The pyrophosphate bond is also sometimes referred to as a phosphoanhydride bond, a naming convention which emphasizes the loss of water that occurs when two phosphates form a new P–O–P bond, and which mirrors the nomenclature for anhydrides of carboxylic acids. Pyrophosphates are found in ATP and other nucleotide triphosphates, which are important in biochemistry. The term pyrophosphate is also the name of esters formed by the condensation of a phosphorylated biological compound with inorganic phosphate, as for dimethylallyl pyrophosphate. This bond is also referred to as a high-energy phosphate bond.

<span class="mw-page-title-main">GMP synthase</span>

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<span class="mw-page-title-main">Nucleoside-diphosphatase</span> Group of proteins having nucleoside-diphosphatase activity

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<span class="mw-page-title-main">Phosphoribosyl-AMP cyclohydrolase</span>

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<span class="mw-page-title-main">ATP phosphoribosyltransferase</span> Class of enzymes

In enzymology, an ATP phosphoribosyltransferase is an enzyme that catalyzes the chemical reaction

References


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