Effects of the polyhistidine tag on kinetics and other properties of trehalose synthase from Deinococcus geothermalis.

Anna Panek; Olga Pietrow; Paweł Filipkowski; Józef Synowiecki

doi:10.18388/abp.2013_1966

Effects of the polyhistidine tag on kinetics and other properties of trehalose synthase from Deinococcus geothermalis.

Anna Panek Department of Food Chemistry, Technology and Biotechnology, Faculty of Chemistry, Gdansk University of Technology, Gdańsk, Poland.;
Olga Pietrow
Paweł Filipkowski
Józef Synowiecki

DOI: https://doi.org/10.18388/abp.2013_1966

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.

Published

2013-06-06

Issue

Vol. 60 No. 2 (2013)

Section

Articles

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