Junne T~Hoepfner D, 2015

Pubmed ID 25616894
Title Decatransin, a new natural product inhibiting protein translocation at the Sec61/SecYEG translocon.
Authors Tina Junne, Joanne Wong, Christian Studer, Thomas Aust, Benedikt W Bauer, Martin Beibel, Bhupinder Bhullar, Robert Bruccoleri, Jürg Eichenberger, David Estoppey, Nicole Hartmann, Britta Knapp, Philipp Krastel, Nicolas Melin, Edward J Oakeley, Lukas Oberer, Ralph Riedl, Guglielmo Roma, Sven Schuierer, Frank Petersen, John A Tallarico, Tom A Rapoport, Martin Spiess, Dominic Hoepfner
Abstract A new cyclic decadepsipeptide was isolated from Chaetosphaeria tulasneorum with potent bioactivity on mammalian and yeast cells. Chemogenomic profiling in S. cerevisiae indicated that the Sec61 translocon complex, the machinery for protein translocation and membrane insertion at the endoplasmic reticulum, is the target. The profiles were similar to those of cyclic heptadepsipeptides of a distinct chemotype (including HUN-7293 and cotransin) that had previously been shown to inhibit cotranslational translocation at the mammalian Sec61 translocon. Unbiased, genome-wide mutagenesis followed by full-genome sequencing in both fungal and mammalian cells identified dominant mutations in Sec61p (yeast) or Sec61α1 (mammals) that conferred resistance. Most, but not all, of these mutations affected inhibition by both chemotypes, despite an absence of structural similarity. Biochemical analysis confirmed inhibition of protein translocation into the endoplasmic reticulum of both co- and post-translationally translocated substrates by both chemotypes, demonstrating a mechanism independent of a translating ribosome. Most interestingly, both chemotypes were found to also inhibit SecYEG, the bacterial Sec61 translocon homolog. We suggest 'decatransin' as the name for this new decadepsipeptide translocation inhibitor.
Citation J. Cell. Sci. 2015; 128:1217-29

Datasets

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Papers Phenotype Conditions Collection Tested mutants Data Details
Junne T~Hoepfner D, 2015 growth (relative abundance in pooled culture) decatransin [1.8 uM] hom 4,514 Quantitative
Junne T~Hoepfner D, 2015 growth (relative abundance in pooled culture) decatransin [1.8 uM] het 5,765 Quantitative
Junne T~Hoepfner D, 2015 growth (relative abundance in pooled culture) heptadepsipeptide [6.8 uM] hom 4,490 Quantitative
Junne T~Hoepfner D, 2015 growth (relative abundance in pooled culture) heptadepsipeptide [6.8 uM] het 5,764 Quantitative
Junne T~Hoepfner D, 2015 growth (relative abundance in pooled culture) HUN-7293 [200 uM] hom 4,504 Quantitative
Junne T~Hoepfner D, 2015 growth (relative abundance in pooled culture) HUN-7293 [200 uM] het 5,752 Quantitative

Curation history

Data

Oct. 18, 2016 Data to request.
Oct. 27, 2016 Data requested.
Oct. 28, 2016 Data to load.
Nov. 21, 2016 Data loaded.

Tested strains

Oct. 18, 2016 Tested strains to request.
Oct. 27, 2016 Tested strains requested.
Oct. 28, 2016 Tested strains to load.
Nov. 21, 2016 Tested strains loaded.