7q3s

Crystal structure of UGT706F8 from Zea mays

spinqualitylabelsall models 7q3s, resolution 1.59Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7q3s is a 1 chain structure with sequence from Zea mays. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.59Å Ligands: UDP Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function B4FG90_MAIZE Publication Abstract from PubMed Regioselective glycosylation is a chemical challenge, leading to multistep syntheses with protecting group manipulations, ultimately resulting in poor atom economy and compromised sustainability. Enzymes allow eco-friendly and regioselective bond formation with fully deprotected substrates in a single reaction. For the selective glucosylation of silibinin, a pharmaceutical challenged with low solubility, enzyme engineering has previously been employed, but the resulting yields and k cat were limited, prohibiting the application of the engineered catalyst. Here, we identified a naturally regioselective silibinin glucosyltransferase, UGT706F8, a family 1 glycosyltransferase from Zea mays. It selectively and efficiently (k cat = 2.1 +/- 0.1 s(-1); K M = 36.9 +/- 5.2 muM; TTN = 768 +/- 22) catalyzes the quantitative synthesis of silibinin 7-O-beta-d-glucoside. We solved the crystal structure of UGT706F8 and investigated the molecular determinants of regioselective silibinin glucosylation. UGT706F8 was the only regioselective enzyme among 18 glycosyltransferases found to be active on silibinin. We found the temperature optimum of UGT706F8 to be 34 degrees C and the pH optimum to be 7-8. Our results indicate that UGT706F8 is an efficient silibinin glycosyltransferase that enables biocatalytic production of silbinin 7-O-beta-d-glucoside. Family 1 Glycosyltransferase UGT706F8 from Zea mays Selectively Catalyzes the Synthesis of Silibinin 7-O-beta-d-Glucoside.,Bidart GN, Putkaradze N, Fredslund F, Kjeldsen C, Ruiz AG, Duus JO, Teze D, Welner DH ACS Sustain Chem Eng. 2022 Apr 25;10(16):5078-5083. doi:, 10.1021/acssuschemeng.1c07593. Epub 2022 Apr 11. PMID:35493695 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Glycosyltransferase 3D structures

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