2DFC
Xylanase II from Tricoderma reesei at 293K
Summary for 2DFC
| Entry DOI | 10.2210/pdb2dfc/pdb |
| Related | 2DFB |
| Descriptor | Endo-1,4-beta-xylanase 2, IODIDE ION (3 entities in total) |
| Functional Keywords | bent beta sheet, hydrolase |
| Biological source | Hypocrea jecorina |
| Total number of polymer chains | 1 |
| Total formula weight | 20965.34 |
| Authors | Harata, K.,Akiba, T. (deposition date: 2006-02-28, release date: 2006-07-11, Last modification date: 2024-10-23) |
| Primary citation | Watanabe, N.,Akiba, T.,Kanai, R.,Harata, K. Structure of an orthorhombic form of xylanase II from Trichoderma reesei and analysis of thermal displacement. ACTA CRYSTALLOGR.,SECT.D, 62:784-792, 2006 Cited by PubMed Abstract: An orthorhombic crystal of xylanase II from Trichoderma reesei was grown in the presence of sodium iodide. Crystal structures at atomic resolution were determined at 100 and 293 K. Protein molecules were aligned along a crystallographic twofold screw axis, forming a helically extended polymer-like chain mediated by an iodide ion. The iodide ion connected main-chain peptide groups between two adjacent molecules by an N-H...I-...H-N hydrogen-bond bridge, thus contributing to regulation of the molecular arrangement and suppression of the rigid-body motion in the crystal with high diffraction quality. The structure at 293 K showed considerable thermal motion in the loop regions connecting the beta-strands that form the active-site cleft. TLS model analysis of the thermal motion and a comparison between this structure and that at 100 K suggest that the fluctuation of these loop regions is attributable to the hinge-like movement of the beta-strands. PubMed: 16790934DOI: 10.1107/S0907444906017379 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (1.19 Å) |
Structure validation
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