Cross-linking chemical modification of pyrroloquinoline quinone (PQQ) glucose dehydrogenase (GDH) by glutaraldehyde was carried out and its stability was analyzed. Although native PQQGDH was inactivated within 30 min at a higher temperature than 50°C, cross-linked PQQGDH retained more than 40% of initial activity even after 30 min of incubation at 54°C. In addition to the increase in thermal stability, cross-linked PQQGDH gained high EDTA tolerance. The stabilization may be achieved by increased the rigidity of PQQGDH hole enzyme conformation.
CITATION STYLE
Sode, K., Shimakita, T., Ohuchi, S., & Yamazaki, T. (1996). Stabilization of pyrroloquinoline quinone glucose dehydrogenase by cross-linking chemical modification. Biotechnology Letters, 18(9), 997–1002. https://doi.org/10.1007/BF00129720
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