Download MendeleyAtomic resolution of the crystal structure of the hyperthermophilic family 12 endocellulase and stabilizing role of the DxDxDG calcium-binding motif in Pyrococcus furiosus.
Kim, H.-W., Kataoka, M., Ishikawa, K.(2012) FEBS Lett 586: 1009-1013
- PubMed: 22569255
- DOI: https://doi.org/10.1016/j.febslet.2012.02.029
- Primary Citation of Related Structures:
3VGI - PubMed Abstract:
Hyperthermophilic glycoside hydrolase family 12 endocellulase (EGPf) from the archaeon Pyrococcus furiosus catalyzes the hydrolytic cleavage of β-1,4-glucosidic linkage in β-glucan cellulose. A truncated EGPf (EGPfΔN30) mutant lacking the proline and hydroxyl-residue rich region at the N terminus was constructed, and its crystal structure was resolved at an atomic resolution of 1.07 Å. Our results indicate that the structure of EGPf, which consists of a β-jelly roll, exhibits structural similarity with the endocellulase of Thermotoga maritima. Additionally, we further determined that the thermostability of EGPf is maintained in part by the binding of Ca²⁺ in a DxDxDG Ca²⁺-binding motif, atypical of most archaeal proteins.
Organizational Affiliation:
National Institute of Advanced Industrial Science and Technology, Biomass Technology Research Center, 3-11-32 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-0046, Japan.
