isomerase

American  

[ahy-som-uh-reys, -reyz] / aɪˈsɒm əˌreɪs, -ˌreɪz /

noun

Biochemistry.

1. any of a class of enzymes that catalyze reactions involving intramolecular rearrangements.

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isomerase British  

/ aɪˈsɒməreɪs /

noun

1. any enzyme that catalyses the conversion of one isomeric form of a compound to another

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Etymology

Origin of isomerase

First recorded in 1940–45; isomer + -ase

Example Sentences

Another enzyme produced by the bacteria, known as arabinose isomerase, then converts the galactose into tagatose.

From Science Daily • Jan. 13, 2026

In the fifth step, an isomerase transforms the dihydroxyacetone-phosphate into its isomer, glyceraldehyde-3-phosphate.

From Textbooks • Jun. 9, 2022

Perhaps this means that xylose isomerase decreases the availability of a glucose substrate needed for the synthesis of trehalose.

From Nature • Oct. 23, 2018

Schretter et al. found that the walking activity of flies that lacked gut bacteria but had been given xylose isomerase was increased by activation of the genes encoding enzymes needed for the synthesis of octopamine.

From Nature • Oct. 23, 2018

In the next step of the first phase of glycolysis, the enzyme glucose-6-phosphate isomerase converts glucose-6-phosphate into fructose-6-phosphate.

From Textbooks • Jun. 19, 2013