1qns

The 3-D structure of a Trichoderma reesei b-mannanase from glycoside hydrolase family 5

spinqualitylabelsall models 1qns, resolution 1.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1qns is a 1 chain structure with sequence from Trichoderma reesei. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.5Å Ligands: GOL, NAG, SO4, TRS Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function MANA_HYPJR Endo-1,4-mannanase that catalyzes the random hydrolysis of (1->4)-beta-D-mannosidic linkages in mannans and heteromannans. It is a crucial enzyme for depolymerization of seed galactomannans and wood galactoglucomannans. Active against locust bean gum and ivory nut mannan, releasing mainly tri- and disaccharides (PubMed:7793911, PubMed:8529653, Ref.3, Ref.4). Also has transglycosylation activity. Transglycosylation of two mannotrioses into a mannohexaose is the major transglycosylation route (PubMed:24950755, PubMed:8529653, Ref.7). [PROSITE-ProRule:PRU00597][SAM:MobiDB-lite] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The crystal structure of the catalytic core domain of beta-mannanase from the fungus Trichoderma reesei has been determined at a resolution of 1.5 A. The structure was solved using the anomalous scattering from a single non-isomorphous platinum complex with two heavy-metal sites in space group P2(1). The map computed with the experimental phases was enhanced by the application of an automated model building and refinement procedure using the amplitudes and experimental phases as observations. This approach is expected to be of more general application. The structure of the native enzyme and complexes with Tris-HCl and mannobiose are also reported: the mannobiose binds in subsites +1 and +2. The structure is briefly compared with that of the homologous beta-mannanase from the bacterium Thermomonospora fusca. The three-dimensional structure of a Trichoderma reesei beta-mannanase from glycoside hydrolase family 5.,Sabini E, Schubert H, Murshudov G, Wilson KS, Siika-Aho M, Penttila M Acta Crystallogr D Biol Crystallogr. 2000 Jan;56(Pt 1):3-13. PMID:10666621 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Mannosidase 3D structures

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