Isolation, structural elucidation and biosynthesis of 3-hydroxy-6-dimethylallylindolin-2-one, a novel prenylated indole derivative from Actinoplanes missouriensis
Biochemical Investigations of Two 6-DMATS Enzymes from<i>Streptomyces</i>Reveal New Features of<scp>L</scp>-Tryptophan Prenyltransferases
作者:Julia Winkelblech、Shu-Ming Li
DOI:10.1002/cbic.201400046
日期:2014.5.5
6‐DMATSSa and 6‐DMATSSv from Streptomyces strains, in the presence of DMAPP and GPP. C6‐prenylated indole derivatives and dihydroxynaphthalenes with prenylation at the unsubstituted ring were identified as enzyme products of 6‐DMATSSa.
Structure and specificity of a permissive bacterial C-prenyltransferase
作者:Sherif I Elshahawi、Hongnan Cao、Khaled A Shaaban、Larissa V Ponomareva、Thangaiah Subramanian、Mark L Farman、H Peter Spielmann、George N Phillips、Jon S Thorson、Shanteri Singh
DOI:10.1038/nchembio.2285
日期:2017.4
study highlights the biochemical and structural characterization of the L-tryptophan C6 C-prenyltransferase (C-PT) PriB fromStreptomyces sp. RM-5-8. PriB was found to be uniquely permissive to a diverse array of prenyl donors and acceptors including daptomycin. Two additional PTs also produced novel prenylated daptomycins with improved antibacterial activities over the parent drug.
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).
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
Isolation, structural elucidation and biosynthesis of 3-hydroxy-6-dimethylallylindolin-2-one, a novel prenylated indole derivative from Actinoplanes missouriensis
Many prenylated indole derivatives are widely distributed in nature. Recently, two Streptomyces prenyltransferases, IptA and its homolog SCO7467, were identified in the biosynthetic pathways for 6-dimethylallylindole (DMAI)-3-carbaldehyde and 5-DMAI-3-acetonitrile, respectively. Here, we isolated a novel prenylated indole derivative, 3-hydroxy-6-dimethylallylindolin (DMAIN)-2-one, based on systematic purification of metabolites from a rare actinomycete, Actinoplanes missouriensis NBRC 102363. The structure of 3-hydroxy-6-DMAIN-2-one was determined by HR-MS and NMR analyses. We found that A. missouriensis produced not only 3-hydroxy-6-DMAIN-2-one but also 6-dimethylallyltryptophan (DMAT) and 6-DMAI when grown in PYM (peptone-yeast extract-MgSO4) medium. We searched the complete genome of A. missouriensis for biosynthesis genes of these compounds and found a gene cluster composed of an iptA homolog (AMIS_22580, named iptA-Am) and a putative tryptophanase gene (AMIS_22590, named tnaA-Am). We constructed a tnaA-Am-deleted (ÎtnaA-Am) strain and found that it produced 6-DMAT but did not produce 6-DMAI or 3-hydroxy-6-DMAIN-2-one. Exogenous addition of 6-DMAI to mutant ÎtnaA-Am resulted in the production of 3-hydroxy-6-DMAIN-2-one. Furthermore, in vitro enzyme assays using recombinant proteins produced by Escherichia coli demonstrated that 6-DMAI was synthesized from tryptophan and dimethylallyl pyrophosphate in the presence of both IptA-Am and TnaA-Am, and that IptA-Am preferred tryptophan to indole as the substrate. From these results, we concluded that the iptA-AmâtnaA-Am gene cluster is responsible for the biosynthesis of 3-hydroxy-6-DMAIN-2-one. Presumably, tryptophan is converted into 6-DMAT by IptA-Am and 6-DMAT is then converted into 6-DMAI by TnaA-Am. 6-DMAI appears to be converted into 3-hydroxy-6-DMAIN-2-one by the function of some unknown oxidases in A. missouriensis.