Improved inorganic phosphate assays

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 14/245 (2006.01)

Patent

CA 2618994

Binding of inorganic phosphate to a phosphate binding protein can result in changes to the stacking of appropriately positioned chromophores, thereby resulting in a detectable change. The invention provides a phosphate-binding protein that undergoes a conformational change from an initial conformation to a final conformation upon binding of phosphate, wherein the protein carries a first label and a second label, and wherein the first and second labels are arranged such that they exhibit molecular stacking that is perturbed on changing from one conformation to the other. Preferred labels are rhodamines.

La liaison du phosphate inorganique à une protéine de liaison du phosphate peut entraîner des modifications quant à l'entassement des chromophores positionnés de manière appropriée, cette modification pouvant être, par conséquent, détectable. L'invention porte sur une protéine de liaison au phosphate qui subit une modification conformationnelle, d'une conformation initiale à une conformation finale, lors de la liaison du phosphate. La protéine porte une première et une seconde étiquette, ces première et seconde étiquettes étant disposées de façon à présenter un entassement moléculaire, perturbé lors du passage d'une conformation à une autre. Les étiquettes préférées sont des rhodamines.

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