Breaking the regioselectivity of indole prenyltransferases: identification of regular C3-prenylated hexahydropyrrolo[2,3-b]indoles as side products of the regular C2-prenyltransferase FtmPT1
作者:Beate Wollinsky、Lena Ludwig、Xiulan Xie、Shu-Ming Li
DOI:10.1039/c2ob26149a
日期:——
mixtures of FtmPT1 with these cyclicdipeptides revealed the presence of additional product peaks in the HPLC chromatograms. Seven regularly C3-prenylated hexahydropyrrolo[2,3-b]indoles were isolated and identified by HR-ESI-MS and NMR analyses including HMBC, HMQC and NOESY experiments. Further experiments proved that the C2- and C3-prenylated products are both independent enzyme products. To the best of
Prenylation at the indole ring leads to a significant increase of cytotoxicity of tryptophan-containing cyclic dipeptides
作者:Beate Wollinsky、Lena Ludwig、Alexandra Hamacher、Xia Yu、Matthias U. Kassack、Shu-Ming Li
DOI:10.1016/j.bmcl.2012.04.119
日期:2012.6
lines. Preliminary results have been clearly shown that prenylation at C2 led to a significant increase of the cytotoxicity of the tested cyclicdipeptides in all the 14 cases. The second amino acid and the stereochemistry of tryptophan moiety of the cyclicdipeptides showed less influence on the cytotoxicity of the tested compounds.