Abstract
In natural systems, various metabolic reactions are often spatially organized to increase enzyme activity and specificity. Thus, by spatially arranging enzyme molecules in synthetic systems to imitate these natural systems, it is possible to promote a high rate of enzymatic turnover. In this present study, a normal and mutant form of the scCro DNA-binding protein were shown to bind orthogonally to specific recognition sequences under appropriate conditions. Furthermore, these DNA-binding tags were used to establish an enzyme assay system based on the spatial arrangement of transglutaminase and its substrate at the molecular level. Together, the results of the present study suggest that the scCro-tag may be a powerful tool to facilitate the synthetic spatial arrangement of proteins on a DNA ligand.
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