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Computational thermostabilization of an enzyme.


ABSTRACT: Thermostabilizing an enzyme while maintaining its activity for industrial or biomedical applications can be difficult with traditional selection methods. We describe a rapid computational approach that identified three mutations within a model enzyme that produced a 10 degrees C increase in apparent melting temperature T(m) and a 30-fold increase in half-life at 50 degrees C, with no reduction in catalytic efficiency. The effects of the mutations were synergistic, giving an increase in excess of the sum of their individual effects. The redesigned enzyme induced an increased, temperature-dependent bacterial growth rate under conditions that required its activity, thereby coupling molecular and metabolic engineering.

SUBMITTER: Korkegian A 

PROVIDER: S-EPMC3412875 | biostudies-literature | 2005 May

REPOSITORIES: biostudies-literature

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Computational thermostabilization of an enzyme.

Korkegian Aaron A   Black Margaret E ME   Baker David D   Stoddard Barry L BL  

Science (New York, N.Y.) 20050501 5723


Thermostabilizing an enzyme while maintaining its activity for industrial or biomedical applications can be difficult with traditional selection methods. We describe a rapid computational approach that identified three mutations within a model enzyme that produced a 10 degrees C increase in apparent melting temperature T(m) and a 30-fold increase in half-life at 50 degrees C, with no reduction in catalytic efficiency. The effects of the mutations were synergistic, giving an increase in excess of  ...[more]

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