9 Aldose-Ketose Isomerases

Genetic substructuring as a result of barriers to gene flow in urban Rana temporaria (common frog) populations: implications for biodiversity conservation

“…Although no formal crosses were carried out, the subunit structures of the enzymes assayed are well characterized as also are the numbers of genetic loci controlling their expression (Noltmann, 1972;Webb, 1984). Without exception, the banding patterns observed in this study were identical to predictions from the above investigations and to those previously carried out on anurans in general (Guttman, 1985) and on Rana, including R. temporaria, in particular .…”

Inhibition of Escherichia coliGlucosamine-6-phosphate Synthase by Reactive Intermediate Analogues

“…That the enzyme displays a low affinity for both of these compounds relative to GlcNol-6-P indicates that the 2-amino and 1-hydroxyl functions are important for tight binding of GlcNol-6-P. Changing the stereochemistry at C2 causes approximately a 4-fold reduction in the binding of ribose 5-phosphate relative to arabinose 5-phosphate. This observation is not unexpected because enzymes that isomerize carbohydrate substrates generally show such stereochemical discrimination (41). Table I shows both arabinose 5-phosphate and ribose 5-phosphate in their acyclic free carbonyl forms so that their structural similarity to the cis-enolamine intermediate is evident.…”

Characteristics and Kinetic Properties of L-Rhamnose Isomerase from <i>Bacillus Subtilis</i> by Isothermal Titration Calorimetry for the Production of D-Allose

“…Pseudomonas stutzeri (Noltmann 1972;Badia et al, 1989;Domagk and Zech 1963;Izumori et al, 1976;Bhuiyan et al, 1999).…”