FRET-enhanced photostability allows improved single-molecule tracking of proteins and protein complexes in live mammalian cells
A major challenge in single-molecule imaging is tracking the dynamics of proteins or complexes for long periods of time in the dense environments found in living cells. Here, we introduce the concept of using FRET to enhance the photophysical properties of photo-modulatable (PM) fluorophores commonl...
| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Nature Publishing Group
2018
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| _version_ | 1797057114162593792 |
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| author | Basu, S Needham, L Lando, D Taylor, E Wohlfahrt, K Shah, D Boucher, W Tan, Y Bates, L Tkachenko, O Cramard, J Lagerholm, B Eggeling, C Hendrich, B Klenerman, D Lee, S Laue, E |
| author_facet | Basu, S Needham, L Lando, D Taylor, E Wohlfahrt, K Shah, D Boucher, W Tan, Y Bates, L Tkachenko, O Cramard, J Lagerholm, B Eggeling, C Hendrich, B Klenerman, D Lee, S Laue, E |
| author_sort | Basu, S |
| collection | OXFORD |
| description | A major challenge in single-molecule imaging is tracking the dynamics of proteins or complexes for long periods of time in the dense environments found in living cells. Here, we introduce the concept of using FRET to enhance the photophysical properties of photo-modulatable (PM) fluorophores commonly used in such studies. By developing novel single-molecule FRET pairs, consisting of a PM donor fluorophore (either mEos3.2 or PA-JF549) next to a photostable acceptor dye JF646, we demonstrate that FRET competes with normal photobleaching kinetic pathways to increase the photostability of both donor fluorophores. This effect was further enhanced using a triplet-state quencher. Our approach allows us to significantly improve single-molecule tracking of chromatin-binding proteins in live mammalian cells. In addition, it provides a novel way to track the localization and dynamics of protein complexes by labeling one protein with the PM donor and its interaction partner with the acceptor dye. |
| first_indexed | 2024-03-06T19:31:41Z |
| format | Journal article |
| id | oxford-uuid:1dac116a-c4c7-4329-9404-901dcf132b9a |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:31:41Z |
| publishDate | 2018 |
| publisher | Nature Publishing Group |
| record_format | dspace |
| spelling | oxford-uuid:1dac116a-c4c7-4329-9404-901dcf132b9a2022-03-26T11:12:12ZFRET-enhanced photostability allows improved single-molecule tracking of proteins and protein complexes in live mammalian cellsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:1dac116a-c4c7-4329-9404-901dcf132b9aEnglishSymplectic Elements at OxfordNature Publishing Group2018Basu, SNeedham, LLando, DTaylor, EWohlfahrt, KShah, DBoucher, WTan, YBates, LTkachenko, OCramard, JLagerholm, BEggeling, CHendrich, BKlenerman, DLee, SLaue, EA major challenge in single-molecule imaging is tracking the dynamics of proteins or complexes for long periods of time in the dense environments found in living cells. Here, we introduce the concept of using FRET to enhance the photophysical properties of photo-modulatable (PM) fluorophores commonly used in such studies. By developing novel single-molecule FRET pairs, consisting of a PM donor fluorophore (either mEos3.2 or PA-JF549) next to a photostable acceptor dye JF646, we demonstrate that FRET competes with normal photobleaching kinetic pathways to increase the photostability of both donor fluorophores. This effect was further enhanced using a triplet-state quencher. Our approach allows us to significantly improve single-molecule tracking of chromatin-binding proteins in live mammalian cells. In addition, it provides a novel way to track the localization and dynamics of protein complexes by labeling one protein with the PM donor and its interaction partner with the acceptor dye. |
| spellingShingle | Basu, S Needham, L Lando, D Taylor, E Wohlfahrt, K Shah, D Boucher, W Tan, Y Bates, L Tkachenko, O Cramard, J Lagerholm, B Eggeling, C Hendrich, B Klenerman, D Lee, S Laue, E FRET-enhanced photostability allows improved single-molecule tracking of proteins and protein complexes in live mammalian cells |
| title | FRET-enhanced photostability allows improved single-molecule tracking of proteins and protein complexes in live mammalian cells |
| title_full | FRET-enhanced photostability allows improved single-molecule tracking of proteins and protein complexes in live mammalian cells |
| title_fullStr | FRET-enhanced photostability allows improved single-molecule tracking of proteins and protein complexes in live mammalian cells |
| title_full_unstemmed | FRET-enhanced photostability allows improved single-molecule tracking of proteins and protein complexes in live mammalian cells |
| title_short | FRET-enhanced photostability allows improved single-molecule tracking of proteins and protein complexes in live mammalian cells |
| title_sort | fret enhanced photostability allows improved single molecule tracking of proteins and protein complexes in live mammalian cells |
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