Structural characteristics of active and inactive glutamate dehydrogenases from the hyperthermophile Pyrobaculum islandicum
- PMID: 22972344
- DOI: 10.1271/bbb.120367
Structural characteristics of active and inactive glutamate dehydrogenases from the hyperthermophile Pyrobaculum islandicum
Abstract
The enzymes from hyperthermophiles are generally extremely thermostable and lose little or no activity during long periods under a variety conditions. This high stability is very attractive, in that it gives the enzymes potential for use in numerous bioprocesses. My research group has investigated this high stability from the viewpoint of the relationship between function and structure. In this review, I describe the molecular mechanism underlying the extreme stability of unboiled NAD-dependent glutamate dehydrogenase from the hyperthermophile Pyrobaculum islandicum. I also describe the activation of the inactive recombinant enzyme produced in mesophilic Escherichia coli from the viewpoint of the relationship between structure and activity.
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