Sarah M. Bouhired

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LaeA is a regulatory protein of the genus Aspergillus which controls global expression of secondary metabolism gene clusters. During a previous genome-wide transcriptional profiling screen, numerous novel gene clusters were found to be regulated by LaeA including a cluster required for the production of the antitumor agent terrequinone A. Beginnings and(More)
A marine-derived fungus of the genus Stachylidium was isolated from the sponge Callyspongia cf. C. flammea. Chemical investigation of the bioactive fungal extract led to the isolation of the novel phthalimidine derivatives marilines A(1) (1a), A(2) (1b), B (2), and C (3). The absolute configurations of the enantiomeric compounds 1a and 1b were assigned by a(More)
The marine-derived fungus Stachylidium sp. was isolated from the sponge Callyspongia cf. C. flammea. Four new, putatively tyrosine-derived and O-prenylated natural products, stachylines A-D (1-4), were obtained from the fungal extract. The structures of 1-4 were elucidated on the basis of extensive spectroscopic analyses. The absolute configuration of(More)
The myxobacterial strain Nannocystis pusilla B150 synthesizes the structurally new polyketides phenylnannolone A–C. Apart from some common volatiles and siderophores, these are the first natural products from the genus Nannocystis. Phenylnannolone A shows inhibitory activity towards the ABCB1 gene product P-glycoprotein and reverses daunorubicin resistance(More)
This report highlights the first biochemical characterization of a multi-domain biosynthetic enzyme for basidiomycete secondary metabolism: the tri-domain enzyme atromentin synthetase AtrA, from Tapinella panuoides, which adenylates and dimerizes 4-hydroxyphenylpyruvic acid into atromentin. Also, the l-tyrosine:2-oxoglutarate aminotransferase AtrD, which(More)
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