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- W4225522907 abstract "Photocaged, activity-based ubiquitin (Ub) probes (Ub-ABPs) have been developed for the time-resolved probing of deubiquitinating enzyme (DUB) activities, but many Ub-ABPs are still challenging to photocage because their warheads (e.g. propargylamide (PA) or dehydroalanine (Dha)) are difficult to temporally block and activate. Here, we describe a new C-terminal backbone modification strategy for the construction of photocaged Ub-ABPs in which a light-sensitive group is placed at the backbone amide bond of the Ub Gly75. This strategy enabled the facile generation of cell-permeable photocaged Ub-PA and Dha probes that could be activated to capture DUBs after photo-irradiation, and were used to profile DUBs in cells under specially designed conditions (e.g. in cells experiencing oxidative stress) or DUBs with isopeptide linkage selectivity. This backbone modification strategy is anticipated to provide a general solution for the development of photocaged Ub ABPs bearing any warheads for DUB profiling." @default.
- W4225522907 created "2022-05-05" @default.
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- W4225522907 date "2022-05-19" @default.
- W4225522907 modified "2023-10-09" @default.
- W4225522907 title "Photocaging of Activity‐Based Ubiquitin Probes via a C‐Terminal Backbone Modification Strategy" @default.
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- W4225522907 doi "https://doi.org/10.1002/anie.202203792" @default.
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