Maltose transacetylase of Escherichia coli. Mapping and cloning of its structural, gene, mac, and characterization of the enzyme as a dimer of identical polypeptides with a molecular weight of 20,000.

Abstract excerpt

malQ mutants, lacking amylomaltase, cannot grown on maltose. However, when maltose is present in the medium, it can be accumulated to high internal levels. In a subsequent slow reaction, accumulated maltose becomes acetylated and leaks back into the medium. The enzyme responsible for this acetylation uses acetyl-CoA as acetyl donor and can be measured in crude extracts (Boos, W., Ferenci, T., and Shuman, H. A....

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