TcCGT1, which is initiated by the spontaneous deprotonation of the substrate. The spacious binding pocket explains the substrate promiscuity, and the binding pose of the substrate determines C‐ or O‐glycosylation activity. Site‐directed mutagenesis at two residues (I94E and G284K) switched C‐ to O‐glycosylation. TcCGT1 is the first plant CGT with a crystal structure and the first flavone 8‐C‐glycosyltransferase
Assessing the Regioselectivity of OleD-Catalyzed Glycosylation with a Diverse Set of Acceptors
作者:Maoquan Zhou、Adel Hamza、Chang-Guo Zhan、Jon S. Thorson
DOI:10.1021/np300890h
日期:2013.2.22
To explore the acceptor regioselectivity of OleD-catalyzed glucosylation, the products of OleD-catalyzed reactions with six structurally diverse acceptors flavones— (daidzein), isoflavones (flavopiridol), stilbenes (resveratrol), indole alkaloids (10-hydroxycamptothecin), and steroids (2-methoxyestradiol)—were determined. This study highlights the first synthesis of flavopiridol and 2-methoxyestradiol
Functional Characterization and Protein Engineering of a Triterpene 3‐/6‐/2′‐
<i>O</i>
‐Glycosyltransferase Reveal a Conserved Residue Critical for the Regiospecificity
We characterized the first plant cycloartane glycosyltransferase AmGT8 from A. membranaceus. Its mutants A394F, A394D, and T131V were discovered using semi-rational design, which showed specific 6-O, 3-O, and 2′-O glycosylation activities, respectively. This study uncovered a conservedresiduecritical for the regiospecificity of plant glycosyltransferases.
Exploring the aglycon promiscuity of a new glycosyltransferase from Pueraria lobata
作者:Lili Sun、Dawei Chen、Ridao Chen、Kebo Xie、Jimei Liu、Lin Yang、Jungui Dai
DOI:10.1016/j.tetlet.2016.02.088
日期:2016.3
Enzymatic glycosylation catalyzed by glycosyltransferases has great potential for creating bioactive glycosylated small-molecule compounds. Here, we highlight the aglyconpromiscuity of a new glycosyltransferase (PlGT7) from Pueraria lobata. PlGT7 exhibited the capability to glycosylate 26 structurally diverse drug-like scaffolds and simple phenolics with UDP-glucose to form O-, S-, and N-glycosides