Abstract
A noticeably increase in activity, keeping total regioselectivity was found in the synthetic behaviour of Escherichia coli β-galactosidase in glycerol-based solvents using a 1:7 molar ratio of donor ( pNP-β-Gal): acceptor (GlcNAc). Yields of up to 97% of β(1→6) with different solvents were found. These reactions take place without noticeable hydrolytic activity and with total regioselectivity, representing a considerable improvement over the use of aqueous buffer or conventional organic solvents. There is a clear dependence of the catalytic results on the solvent structure, which is analysed in terms of polarity and hydrophobicity.
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