Methods of detecting polynucleotide kinase and its use as a...

C - Chemistry – Metallurgy – 12 – Q

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C12Q 1/68 (2006.01) C07H 21/00 (2006.01) C12P 19/34 (2006.01) C12Q 1/48 (2006.01)

Patent

CA 2374393

Methods of detecting or measuring the activity of polynucleotide kinase are disclosed as well as methods of detecting an analyte in an assay using polynucleotide kinase as a label on a member of a specific binding pair. The methods rely on the phosphorylation of an oligonucleotide followed by ligation of the oligonucleotide 5'-phosphate onto another template-bound oligonucleotide. The presence of the ligated product signals the presence of polynucleotide kinase. In preferred embodiments, phosphorylation of an oligonucleotide enables the consecutive ligation of a set of oligonucleotides. The oligonucleotides so ligated can be detectably labeled with, for example, other enzymes to provide highly sensitive detection methods.

L'invention concerne des procédés de détection ou de mesure de l'activité de la polynucléotide-kinase ainsi que des procédés de détection d'un analyte dans un dosage, au moyen de la polynucléotide-kinase utilisée comme marqueur sur un élément d'une paire de liaison spécifique. Ledit procédé consiste à phosphoryler un oligonucléotide, puis à souder le 5'-phosphate oligonucléotide à un autre oligonucléotide lié à une matrice. La présence du produit soudé signale la présence d'une polynucléotide-kinase. Dans des modes de réalisation préférés, la phosphorylation d'un oligonucléotide permet la soudure consécutive d'un ensemble d'oligonucléotides. Les oligonucléotides ainsi soudés peuvent être marqués de manière détectable à l'aide, par exemple, d'autres enzymes, de sorte que des procédés de détection hautement sensibles soient produits.

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