Controlling Phosphate Removal with Light: The Development of Optochemical Tools to Probe Protein Phosphatase Function.
Taylor M CourtneyAlexander DeitersPublished in: SLAS discovery : advancing life sciences R & D (2020)
Protein phosphatases play an essential role in cell signaling; however, they remain understudied compared with protein kinases, in part due to a lack of appropriate tools. In order to provide conditional control over phosphatase function, we developed two different approaches for rendering MKP3 (a dual-specific phosphatase, also termed DUSP6) activatable by light. Specifically, we expressed the protein with strategically placed light-removable protecting groups in cells with an expanded genetic code. This allowed for the acute perturbation of the Ras/MAPK signaling pathway upon photoactivation in live cells. In doing so, we confirmed that MKP3 does not act as a thresholding gate for growth factor stimulation of the extracellular signal-regulated kinase (ESRK) pathway.
Keyphrases
- induced apoptosis
- signaling pathway
- growth factor
- protein protein
- cell cycle arrest
- amino acid
- pi k akt
- oxidative stress
- binding protein
- protein kinase
- single cell
- cell death
- endoplasmic reticulum stress
- transcription factor
- mesenchymal stem cells
- cell therapy
- drug induced
- bone marrow
- intensive care unit
- photodynamic therapy
- hepatitis b virus