9fyz

Crystal structure of SusA amylase from Bacteroides thetaiotaomicron covalently bound to alpha-1,6 branched pseudo-trisaccharide activity-based probe

spinqualitylabelsall models 9fyz, resolution 2.43Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 9fyz is a 6 chain structure with sequence from Bacteroides thetaiotaomicron. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.43Å Ligands: CA, GLC, IMD, OC9, PBW Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function SUSA_BACTN Neopullulanase that cleaves 1,4-alpha-glucosidic linkages in starch to produce disaccharides or trisaccharides in starch degradation. Publication Abstract from PubMed alpha-Amylases are the workhorse enzymes of starch degradation. They are central to human health, including as targets for anti-diabetic compounds, but are also the key enzymes in the industrial processing of starch for biofuels, corn syrups, brewing and detergents. Dissection of the activity, specificity and stability of alpha-amylases is crucial to understanding their biology and allowing their exploitation. Yet, functional characterization lags behind DNA sequencing and genomics; and new tools are required for rapid analysis of alpha-amylase function. Here, we design, synthesize and apply new branched alpha-amylase activity-based probes. Using both alpha-1,6 branched and unbranched alpha-1,4 maltobiose activity-based probes we were able to explore the stability and substrate specificity of both a panel of human gut microbial alpha-amylases and a panel of industrially relevant alpha-amylases. We also demonstrate how we can detect and annotate the substrate specificity of alpha-amylases in the complex cell lysate of both a prominent gut microbe and a diverse compost sample by in-gel fluorescence and mass spectrometry. A toolbox of starch-active activity-based probes will enable rapid functional dissection of alpha-amylases. We envisage activity-based probes contributing to better selection and engineering of enzymes for industrial application as well as fundamental analysis of enzymes in human health. Precision Activity-Based alpha-Amylase Probes for Dissection and Annotation of Linear and Branched-Chain Starch-Degrading Enzymes.,Pickles IB, Chen Y, Moroz O, Brown HA, de Boer C, Armstrong Z, McGregor NGS, Artola M, Codee JDC, Koropatkin NM, Overkleeft HS, Davies GJ Angew Chem Int Ed Engl. 2024 Nov 27:e202415219. doi: 10.1002/anie.202415219. PMID:39601378 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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