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Thiophosphorylation of histidine
M C Pirrung1, K D James, V S Rana
1Department of Chemistry, Levine Science Research Center, Duke University, Durham, North Carolina 27708-0317, USA. pirrung@chem.duke.edu
The Journal of Organic Chemistry
|December 12, 2000
Summary
Researchers developed a new phosphorus compound for specific thiophosphorylation of histidine. This method allows for labeling proteins with phosphorothioate groups, aiding in biochemical studies.
Area of Science:
- Biochemistry
- Organic Chemistry
Background:
- Histidine phosphorylation is crucial in cellular signaling.
- Specific chemical modification of histidine residues is challenging.
Purpose of the Study:
- To develop a novel method for specific thiophosphorylation of histidine.
- To characterize the resulting thiophosphorylated histidine species.
- To establish a model for introducing labels into histidine phosphorothioate-containing proteins.
Main Methods:
- Preparation of a novel thiophosphoramidate reagent.
- Thiophosphorylation of histidine at the 3-position.
- Spectroscopic analysis (NMR) of thiophosphoramidate and 3-thiophosphohistidine.
- Alkylation of 3-thiophosphohistidine with phenacyl bromide.
Main Results:
- Successful synthesis of thiophosphoramidate.
- Specific thiophosphorylation of histidine at the 3-position achieved.
- Characterization of spectroscopic properties of thiophosphoramidate and 3-thiophosphohistidine.
- Demonstration of alkylation for probe introduction.
Conclusions:
- Thiophosphoramidate enables specific histidine thiophosphorylation.
- The method provides a route for labeling proteins with phosphorothioate groups.
- This facilitates the study of histidine phosphorothioate-containing proteins.