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Updated: May 10, 2026

Rapid One-step Enzymatic Synthesis and All-aqueous Purification of Trehalose Analogues
Published on: February 17, 2017
Effects of the polyhistidine tag on kinetics and other properties of trehalose synthase from Deinococcus geothermalis
Anna Panek1, Olga Pietrow, Paweł Filipkowski
1Department of Food Chemistry, Technology and Biotechnology, Faculty of Chemistry, Gdansk University of Technology, Gdańsk, Poland.
Abstract:
Two recombinant trehalose synthases from Deinococcus geothermalis (DSMZ 11300) were compared. A significant influence of the artificial polyhistidine tag was observed in protein constitution. The recombinant trehalose synthase from D. geothermalis with His₆-tag has a higher Km value of 254 mM, in comparison with the wild-type trehalose synthase (Km 170 mM), and displayed a lower activity of maltose conversion when compared to the wild type. Moreover, differences in properties like temperature, pH, thermal- and pH-stability were observed. Presence of the histidine tag caused a decrease of thermal resistance in case of trehalose synthase with His₆-tag. These data confirmed a suggestion that the introduction of the histidine domain produces in some seldom cases undesirable changes in the protein.

