| Autor: |
Sarah O'Keefe, Pratiti Bhadra, Kwabena Duah, Guanghui Zong, Levise Tenay, Lauren Andrews, Hayden Schneider, Ashley Anderson, Zhijian Hu, Hazim Aljewari, Belinda Hall, Rachel Simmonds, Volkhard Helms, Stephen High, Wei Shi |
| Rok vydání: |
2022 |
| DOI: |
10.26434/chemrxiv-2022-sc5xv |
| Popis: |
The macrocyclic small molecule inhibitor ipomoeassin F (Ipom-F) binds to the central Sec61α subunit of the Sec61 complex and induces cytotoxicity by disrupting multiple aspects of Sec61-mediated protein biogenesis at the endoplasmic reticulum (ER). Here, we show that the integrity of the Ipom-F macrocycle is not required either for Sec61 inhibition in vitro or the induction of cell death, which is abrogated in cells expressing a resistance-conferring Sec61α mutant. We conclude that Ipom-F and its open-chain analogues interact with Sec61α via its mycolactone binding site and/or lateral gate, thereby occluding the normal Sec61-mediated pathway for membrane protein insertion at the ER. Using biology-directed and in silico-aided design, we have revolutionised the production of Ipom-F to yield open-chain analogue 3; a potent, simplified and synthetically accessible Ipom-F-derived Sec61 inhibitor. We present 3 as a lead compound for the generation of new protein translocation probes and future therapeutic development. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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