title: Reconstruction of pyrrolo[2,3-b]indoles carrying an alpha-configured reverse C3-dimethylallyl moiety by using recombinant enzymes.
abstract: Nine reversely C3-prenylated pyrrolo[2,3-b]indoles were successfully prepared by using two recombinant enzymes involved in the biosynthesis of acetylaszonalenin from Neosartorya fischeri. The prenyltransferase AnaPT catalysed the conversion of six tryptophan-containing cyclic dipeptides to reversely C3-prenylated indoline derivatives. Using cyclo-L-Trp-L-Trp as substrate, both mono- and diprenylated indolines were obtained. Two of the AnaPT products were acetylated at position N1 by the acetyltransferase AnaAT. The structures of the obtained compounds were characterised by HR-ESI-MS, (1)H- and (13)C-NMR analyses as well as by long-range (1)H-(13)C connectivities in heteronuclear multiple-bond correlation (HMBC) spectra after preparative isolation. Their absolute configurations were determined by analysing the (1)H-(1)H spatial correlations in rotating-frame nuclear overhauser effect spectroscopy (ROESY).
authors.affiliation: Philipps-Universität Marburg, Institut für Pharmazeutische Biologie, Deutschhausstrasse 17A, D-35037, Marburg, Germany.
authors.forename: Wen-Bing
authors.initials: WB
authors.lastname: Yin
authors.forename: Xiu-Lan
authors.initials: XL
authors.lastname: Xie
authors.forename: Marco
authors.initials: M
authors.lastname: Matuschek
authors.forename: Shu-Ming
authors.initials: SM
authors.lastname: Li
mesh_terms: D000123:Acetyltransferases / Q000378:metabolism; D004122:Dimethylallyltranstransferase / Q000378:metabolism; D004151:Dipeptides / Q000378:metabolism; D007211:Indoles / Q000737:chemistry / Q000378:metabolism*; D015394:Molecular Structure; D055326:Neosartorya / Q000201:enzymology*; D011758:Pyrroles / Q000737:chemistry / Q000378:metabolism*; D014364:Tryptophan / Q000378:metabolism
chemical_list: D004151:Dipeptides; D007211:Indoles; D011758:Pyrroles; D014364:Tryptophan; D000123:Acetyltransferases; D004122:Dimethylallyltranstransferase