6jen

Structure of Phytolacca americana UGT2 complexed with UDP-2fluoro-glucose and pterostilbene

spinqualitylabelsall models 6jen, resolution 2.65Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6jen is a 3 chain structure with sequence from Phytolacca americana. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.65Å Ligands: 3RL, U2F Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function B5MGN7_PHYAM Publication Abstract from PubMed The glycosylation of small hydrophobic compounds is catalyzed by uridine diphosphate glycosyltransferases (UGTs). Because glycosylation is an invaluable tool for improving the stability and water solubility of hydrophobic compounds, UGTs have attracted attention for their application in the food, cosmetics, and pharmaceutical industries. However, the ability of UGTs to accept and glycosylate a wide range of substrates is not clearly understood due to the existence of a large number of UGTs. PaGT2, a UGT from Phytolacca americana, can regioselectively glycosylate piceatannol but has low activity toward other stilbenoids. To elucidate the substrate specificity and catalytic mechanism, we determined the crystal structures of PaGT2 with and without substrates and performed molecular docking studies. The structures have revealed key residues involved in substrate recognition and suggest the presence of a nonconserved catalytic residue (His81) in addition to the highly conserved catalytic histidine in UGTs (His18). The role of the identified residues in substrate recognition and catalysis is elucidated with the mutational assay. Additionally, the structure-guided mutation of Cys142 to other residues, Ala, Phe, and Gln, allows PaGT2 to glycosylate resveratrol with high regioselectivity, which is negligibly glycosylated by the wild-type enzyme. These results provide a basis for tailoring an efficient glycosyltransferase. An Ambidextrous Polyphenol Glycosyltransferase PaGT2 from Phytolacca americana.,Maharjan R, Fukuda Y, Shimomura N, Nakayama T, Okimoto Y, Kawakami K, Nakayama T, Hamada H, Inoue T, Ozaki SI Biochemistry. 2020 Jul 14;59(27):2551-2561. doi: 10.1021/acs.biochem.0c00224., Epub 2020 Jul 2. PMID:32525309 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Glycosyltransferase 3D structures

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