Detection of histidine kinases via a filter-based assay and reverse-phase thin-layer chromatographic phosphoamino acid analysis

The methods that detect histidine phosphorylation have largely been either laborious or difficult to apply quantitatively. The major difficulty in assessing for its presence is its alkali-stable, acid-labile nature. While an assay that detects alkali-stable phosphorylation has been developed, it doe...

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Bibliographic Details
Published in:Analytical biochemistry 2003-12, Vol.323 (1), p.122-126
Main Authors: Tan, Eiling, Lin Zu, Xin, Yeoh, George C, Besant, Paul G, Attwood, Paul V
Format: Article
Language:English
Subjects:
Acid-labile
Alkali-stable
Chromatography, Thin Layer - methods
Fungal Proteins - analysis
Histidine - analogs & derivatives
Histidine - analysis
Histidine Kinase
Histones - analysis
Kinase assay
Membranes, Artificial
Phosphohistidine
Phosphorylation
Protein Kinases - analysis
Protein Kinases - metabolism
Reverse-phase thin-layer chromatography
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Summary:The methods that detect histidine phosphorylation have largely been either laborious or difficult to apply quantitatively. The major difficulty in assessing for its presence is its alkali-stable, acid-labile nature. While an assay that detects alkali-stable phosphorylation has been developed, it does not distinguish phosphohistidine from other alkali-stable phosphoamino acids. Using this established method, we extend the assay to facilitate the specific detection of phosphohistidine. We use the acid-lability of phosphohistidine as a defining feature in our approach for its detection. In addition, reverse-phase thin-layer chromatography was utilized to conclusively demonstrate the viability of the conditions that we implement in the assay for the selective detection of phosphohistidine. In summary, this report describes a rapid filter-based kinase assay that quantitatively measures histidine kinase activity, even in the presence of tyrosine kinase activity.
ISSN:0003-2697
1096-0309
DOI:10.1016/j.ab.2003.08.035