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Yu, Chunxiao; Wang, Longfei; Rowe, R. Grant; Han, Areum; Ji, Wanying; McMahon, Conor; Baier, Alexander S.; Huang, Yu-Chung; Marion, William; Pearson, Daniel S.; Kruse, Andrew C.; Daley, George Q.; Wu, Hao; Sliz, Piotr
Proceedings of the National Academy of Sciences - PNAS, 03/2020, Letnik: 117, Številka: 9Journal Article
The LIN28:pre-let-7:TUTase ternary complex regulates pluripotency and oncogenesis by controlling processing of the let-7 family of microRNAs. The complex oligouridylates the 3′ ends of pre-let-7 molecules, leading to their degradation via the DIS3L2 exonuclease. Previous studies suggest that components of this complex are potential therapeutic targets in malignancies that aberrantly express LIN28. In this study we developed a functional epitope selection approach to identify nanobody inhibitors of the LIN28:pre-let-7:TUT4 complex. We demonstrate that one of the identified nanobodies, Nb-S2A4, targets the 106-residue LIN28:let-7 interaction (LLI) fragment of TUT4. Nb-S2A4 can effectively inhibit oligouridylation andmonouridylation of pre-let-7g in vitro. Expressing Nb-S2A4 allows maturation of the let-7 species in cells expressing LIN28, highlighting the therapeutic potential of targeting the LLI fragment.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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