Isomerases


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Related to Isomerases: Ligases, Lyases, Transferases
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Isomerases

 

a class of enzymes comprising those that catalyze the intramolecular migration of various groups and the interconversion reactions of various isomers.

Isomerases catalyzing the interconversion of stereoisomers are called racemases or epimerases according to the number of centers of asymmetry in the substrate molecule. The isomerases also include cis-trans-isomerases, intramolecular oxidoreductases, intramolecular transferases, and intramolecular lyases. Sometimes the enzymes that catalyze the transfer of a group from one part of a molecule to another are called mutases.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Kinetic studies of Mg2+ Co2+ and Mn2+ D-xylose isomerases. Biochem.
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Targeting carcinogenesis: a role for the prolyl isomerase Pin1?
Peroxisomal [[DELTA].sup.3],[[DELTA].sup.2]-enoyl-CoA isomerase (PECI) was located near the boundary of the quantitative trait loci (QTL) region.
(21) The significance of these cis, trans dienoic acids is complicated by the fact that in mammals, lipids are stored for practical purposes solely as saturated fat, and that in processing, the enoyl-coenzyme A isomerase system (22) interconverts cis, trans dienoic acids.
Characterization of a fungal maleylacetoacetate isomerase gene and identification of its human homologue.
Determination of kinetic constants for peptidyl prolyl cis-trans isomerases by an improved spectrophotometric assay.
Modelling and bioinformatics studies of the human Kappa-class glutathione transferase predict a novel third glutathione transferase family with similarity to prokaryotic 2-hydroxychromene-2-carboxylate isomerases. Biochem.
A few enzymes of the GST family, including PcpC, maleylacetoacetate isomerase, and maleylpyruvate isomerase, have complex and unusual mechanisms involving additional steps before and/or after the nucleophilic attack of glutathione on an electrophilic intermediate [32-36].
Sixteen chapters cover subjects such as bioseparations using hollow fibres, extraction techniques, bioseparations with supercritical fluids, scale-up techniques, precipitation of biomolecules, foam-based separation of proteins, eletrophoresis, affinity chromotography, membrane separation, microfiltration in the drying process industry, whey protein isolation and fractionation using ion exchangers, separation processes in flavour manufacture, separation and purification processes for the recovery of industrial enzymes, and finally novel processes for the recovery of high-purity glucose isomerases.