Expansion of Enzymatic Friedel–Crafts Alkylation on Indoles: Acceptance of Unnatural β-Unsaturated Allyl Diphospates by Dimethylallyl-tryptophan Synthases
摘要:
Prenyltransferases of the dimethylallyl-tryptophan synthase (DMATS) superfamily catalyze Friedel-Crafts alkylation with high flexibility for aromatic substrates, but the high specificity for dimethylallyl diphosphate (DMAPP) prohibits their application as biocatalysts. We demonstrate here that at least one methyl group in DMAPP can be deleted or shifted to the delta-position. For acceptance by some DMATS enzymes, however, a double bond must be situated at the beta-position. Furthermore, the alkylation position of an analogue can differ from that of DMAPP.
Biochemical Characterization of Indole Prenyltransferases
作者:Xia Yu、Yan Liu、Xiulan Xie、Xiao-Dong Zheng、Shu-Ming Li
DOI:10.1074/jbc.m111.317982
日期:2012.1
respectively. Average turnover number (k(cat)) at 1.1 s(-1) was calculated from kinetic data of L-tryptophan and DMAPP. Catalytic efficiencies of 5-dimethylallyltryptophan synthase for L-tryptophan at 25,588 s(-1).M(-1) and for other 11 simple indole derivatives up to 1538 s(-1).M(-1) provided evidence for its potential usage as a catalyst for chemoenzymatic synthesis.
Characterisation of 6-DMATS<sub>Mo</sub> from Micromonospora olivasterospora leading to identification of the divergence in enantioselectivity, regioselectivity and multiple prenylation of tryptophan prenyltransferases
作者:Julia Winkelblech、Xiulan Xie、Shu-Ming Li
DOI:10.1039/c6ob01803c
日期:——
secondary metabolites including indole derivatives usually demonstrate improved biological and pharmacological activities, which make them promising candidates for drug discovery and development. The transfer reactions of a prenyl moiety from a prenyl donor, e.g. dimethylallyldiphosphate (DMAPP), to an acceptor is catalysed by prenyltransferases. One special group of such enzymes uses DMAPP and tryptophan
Tryptophan prenyltransferases showing higher catalytic activities for Friedel–Crafts alkylation of o- and m-tyrosines than tyrosine prenyltransferases
作者:Aili Fan、Xiulan Xie、Shu-Ming Li
DOI:10.1039/c5ob01040c
日期:——
Better conversion of l-o- and l-m-tyrosine to their C-prenylated derivatives by tryptophan prenyltransferases (Trp-PTs) than tyrosine O-prenyltransferases (Tyr-O-PT).