1WC2
Beta-1,4-D-endoglucanase Cel45A from blue mussel Mytilus edulis at 1.2A
Summary for 1WC2
| Entry DOI | 10.2210/pdb1wc2/pdb |
| Descriptor | ENDOGLUCANASE, ACETATE ION, DI(HYDROXYETHYL)ETHER, ... (4 entities in total) |
| Functional Keywords | hydrolase, cellulase, cellulose, double-psi fold, glycoside hydrolase |
| Biological source | MYTILUS EDULIS (BLUE MUSSEL) |
| Total number of polymer chains | 1 |
| Total formula weight | 20003.78 |
| Authors | Jakobsson, E.,Mahdi, S.,Kleywegt, G.J.,Stahlberg, J. (deposition date: 2004-11-08, release date: 2006-05-24, Last modification date: 2024-10-23) |
| Primary citation | Okmane, L.,Nestor, G.,Jakobsson, E.,Xu, B.,Igarashi, K.,Sandgren, M.,Kleywegt, G.J.,Stahlberg, J. Glucomannan and beta-glucan degradation by Mytilus edulis Cel45A: Crystal structure and activity comparison with GH45 subfamily A, B and C. Carbohydr Polym, 277:118771-118771, 2022 Cited by PubMed Abstract: The enzymatic hydrolysis of barley beta-glucan, konjac glucomannan and carboxymethyl cellulose by a β-1,4-D-endoglucanase MeCel45A from blue mussel, Mytilus edulis, which belongs to subfamily B of glycoside hydrolase family 45 (GH45), was compared with GH45 members of subfamilies A (Humicola insolens HiCel45A), B (Trichoderma reesei TrCel45A) and C (Phanerochaete chrysosporium PcCel45A). Furthermore, the crystal structure of MeCel45A is reported. Initial rates and hydrolysis yields were determined by reducing sugar assays and product formation was characterized using NMR spectroscopy. The subfamily B and C enzymes exhibited mannanase activity, whereas the subfamily A member was uniquely able to produce monomeric glucose. All enzymes were confirmed to be inverting glycoside hydrolases. MeCel45A appears to be cold adapted by evolution, as it maintained 70% activity on cellohexaose at 4 °C relative to 30 °C, compared to 35% for TrCel45A. Both enzymes produced cellobiose and cellotetraose from cellohexaose, but TrCel45A additionally produced cellotriose. PubMed: 34893216DOI: 10.1016/j.carbpol.2021.118771 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (1.2 Å) |
Structure validation
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