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. 2021 Apr 16;2:656751. doi: 10.3389/ffunb.2021.656751

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Copyright © 2021 Takahashi, Umemura, Ninomiya, Kusuya, Shimizu, Urayama, Watanabe, Kamei, Yaguchi and Hagiwara.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Characterization of the ter cluster and terrein production in A. lentulus. (A) Schematic structure of the ter cluster in A. lentulus and A. terreus. The SM backbone genes (PKSs) are indicated by purple arrows. Genes (terG, terH, terI, and terJ) whose involvement in terrein production remains obscure in A. terreus are indicated by gray arrows. (B) The expression profiles of ter genes in A. lentulus shown using a heat map. (C) The production of terrein in A. lentulus. The strains were cultivated in PDB, SB, CD, and PDA, and ethyl acetate-derived culture extracts were analyzed using high-performance liquid chromatography. Terrein (1) production was identified by comparison with the standard compound (Std.). The corresponding peaks are indicated by arrows, and the UV spectrum from a PDA culture is compared with that of the standard compound.