3WQ7
New crystal form of the hyperthermophilic family 12 endo-cellulase from Pyrococcus furiosus
Summary for 3WQ7
| Entry DOI | 10.2210/pdb3wq7/pdb |
| Related | 3VGI 3WQ0 3WQ1 |
| Descriptor | Endoglucanase A, CALCIUM ION, GLYCEROL, ... (4 entities in total) |
| Functional Keywords | beta-jelly roll, glycoside hydrolase, hydrolase |
| Biological source | Pyrococcus furiosus |
| Total number of polymer chains | 2 |
| Total formula weight | 73664.97 |
| Authors | Kataoka, M.,Ishikawa, K. (deposition date: 2014-01-23, release date: 2014-07-02, Last modification date: 2024-03-20) |
| Primary citation | Kataoka, M.,Ishikawa, K. A new crystal form of a hyperthermophilic endocellulase. Acta Crystallogr.,Sect.F, 70:878-883, 2014 Cited by PubMed Abstract: The hyperthermophilic glycoside hydrolase family endocellulase 12 from the archaeon Pyrococcus furiosus (EGPf; Gene ID PF0854; EC 3.2.1.4) catalyzes the hydrolytic cleavage of the β-1,4-glucosidic linkage in β-glucan in lignocellulose biomass. A crystal of EGPf was previously prepared at pH 9.0 and its structure was determined at an atomic resolution of 1.07 Å. This article reports the crystallization of EGPf at the more physiologically relevant pH of 5.5. Structure determination showed that this new crystal form has the symmetry of space group C2. Two molecules of the enzyme are observed in the asymmetric unit. Crystal packing is weak at pH 5.5 owing to two flexible interfaces between symmetry-related molecules. Comparison of the EGPf structures obtained at pH 9.0 and pH 5.5 reveals a significant conformational difference at the active centre and in the surface loops. The interfaces in the vicinity of the flexible surface loops impact the quality of the EGPf crystal. PubMed: 25005081DOI: 10.1107/S2053230X14010930 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (1.68 Å) |
Structure validation
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