2014
DOI: 10.1111/ppl.12242
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Occurrence of phosphorylated castasterone in Arabidopsis thaliana and Lycopersicum esculentum

Abstract: An in vitro enzyme assay using radioisotope-labeled (3) H-castasterone ((3) H-CS) or (32) P-ATP showed that CS can be phosphorylated by ATP in Arabidopsis and tomato plants. Gas chromatography-mass spectrometry (GC-MS) analysis using non-isotope-labeled CS and ATP revealed that the phosphorylation of CS occurs at the side chain, most likely at the C-23 hydroxyl. The polar fractions than free brassinosteroids (BRs) obtained from extracts of Arabidopsis and tomato showed almost no BRs activity in a rice lamina i… Show more

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Cited by 4 publications
(1 citation statement)
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“…Commercial wheat germ acid phosphatase (WGAP) is extracted from the germ/embryo of wheat plants and is commonly used in vitro in many biochemistry laboratories. Specifically, its availability and inexpensive cost have historically made it a common choice for many projects which require a broad specificity phosphatase, including those in education and research (see, for example, references [2][3][4][5][6][7][8][9][10][11][12]). While the name wheat germ acid phosphatase implies a singular protein, it typically refers to a commercial preparation of partially purified protein which is known to contain multiple proteins [13][14][15][16][17][18].…”
Section: Introductionmentioning
confidence: 99%
“…Commercial wheat germ acid phosphatase (WGAP) is extracted from the germ/embryo of wheat plants and is commonly used in vitro in many biochemistry laboratories. Specifically, its availability and inexpensive cost have historically made it a common choice for many projects which require a broad specificity phosphatase, including those in education and research (see, for example, references [2][3][4][5][6][7][8][9][10][11][12]). While the name wheat germ acid phosphatase implies a singular protein, it typically refers to a commercial preparation of partially purified protein which is known to contain multiple proteins [13][14][15][16][17][18].…”
Section: Introductionmentioning
confidence: 99%