Direct imaging of the recruitment and phosphorylation of S6K1 in the mTORC1 pathway in living cells
Knowledge of protein signalling pathways in the working cell is seen as a primary route to identifying and developing targeted medicines. In recent years there has been a growing awareness of the importance of the mTOR pathway, making it an attractive target for therapeutic intervention in several d...
| Main Authors: | , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Nature Research
2019
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| _version_ | 1826260290673573888 |
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| author | Ahmed, A Owens, R Stubbs, C Parker, A Hitchman, R Yadav, R Dumoux, M Hawes, C Botchway, S |
| author_facet | Ahmed, A Owens, R Stubbs, C Parker, A Hitchman, R Yadav, R Dumoux, M Hawes, C Botchway, S |
| author_sort | Ahmed, A |
| collection | OXFORD |
| description | Knowledge of protein signalling pathways in the working cell is seen as a primary route to identifying and developing targeted medicines. In recent years there has been a growing awareness of the importance of the mTOR pathway, making it an attractive target for therapeutic intervention in several diseases. Within this pathway we have focused on S6 kinase 1 (S6K1), the downstream phosphorylation substrate of mTORC1, and specifically identify its juxtaposition with mTORC1. When S6K1 is co-expressed with raptor we show that S6K1 is translocated from the nucleus to the cytoplasm. By developing a novel biosensor we demonstrate in real-time, that phosphorylation and de-phosphorylation of S6K1 occurs mainly in the cytoplasm of living cells. Furthermore, we show that the scaffold protein raptor, that typically recruits mTOR substrates, is not always involved in S6K1 phosphorylation. Overall, we demonstrate how FRET-FLIM imaging technology can be used to show localisation of S6K1 phosphorylation in living cells and hence a key site of action of inhibitors targeting mTOR phosphorylation. |
| first_indexed | 2024-03-06T19:03:16Z |
| format | Journal article |
| id | oxford-uuid:14443750-f647-40a4-8f83-65b0bfd3a599 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:03:16Z |
| publishDate | 2019 |
| publisher | Nature Research |
| record_format | dspace |
| spelling | oxford-uuid:14443750-f647-40a4-8f83-65b0bfd3a5992022-03-26T10:18:50ZDirect imaging of the recruitment and phosphorylation of S6K1 in the mTORC1 pathway in living cellsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:14443750-f647-40a4-8f83-65b0bfd3a599EnglishSymplectic Elements at OxfordNature Research2019Ahmed, AOwens, RStubbs, CParker, AHitchman, RYadav, RDumoux, MHawes, CBotchway, SKnowledge of protein signalling pathways in the working cell is seen as a primary route to identifying and developing targeted medicines. In recent years there has been a growing awareness of the importance of the mTOR pathway, making it an attractive target for therapeutic intervention in several diseases. Within this pathway we have focused on S6 kinase 1 (S6K1), the downstream phosphorylation substrate of mTORC1, and specifically identify its juxtaposition with mTORC1. When S6K1 is co-expressed with raptor we show that S6K1 is translocated from the nucleus to the cytoplasm. By developing a novel biosensor we demonstrate in real-time, that phosphorylation and de-phosphorylation of S6K1 occurs mainly in the cytoplasm of living cells. Furthermore, we show that the scaffold protein raptor, that typically recruits mTOR substrates, is not always involved in S6K1 phosphorylation. Overall, we demonstrate how FRET-FLIM imaging technology can be used to show localisation of S6K1 phosphorylation in living cells and hence a key site of action of inhibitors targeting mTOR phosphorylation. |
| spellingShingle | Ahmed, A Owens, R Stubbs, C Parker, A Hitchman, R Yadav, R Dumoux, M Hawes, C Botchway, S Direct imaging of the recruitment and phosphorylation of S6K1 in the mTORC1 pathway in living cells |
| title | Direct imaging of the recruitment and phosphorylation of S6K1 in the mTORC1 pathway in living cells |
| title_full | Direct imaging of the recruitment and phosphorylation of S6K1 in the mTORC1 pathway in living cells |
| title_fullStr | Direct imaging of the recruitment and phosphorylation of S6K1 in the mTORC1 pathway in living cells |
| title_full_unstemmed | Direct imaging of the recruitment and phosphorylation of S6K1 in the mTORC1 pathway in living cells |
| title_short | Direct imaging of the recruitment and phosphorylation of S6K1 in the mTORC1 pathway in living cells |
| title_sort | direct imaging of the recruitment and phosphorylation of s6k1 in the mtorc1 pathway in living cells |
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