A cyanine-based probe\tag-peptide pair for fluorescence...

C - Chemistry – Metallurgy – 09 – B

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C09B 23/06 (2006.01) C07K 1/13 (2006.01) C09B 23/08 (2006.01)

Patent

CA 2683158

A molecular probe comprises two arsenic atoms and at least one cyanine based moiety. A method of producing a molecular probe includes providing a molecule having a first formula, treating the molecule with HgOAc, and subsequently transmetallizing with AsCI3. The As is liganded to ethanedithiol to produce a probe having a second formula. A method of labeling a peptide includes providing a peptide comprising a tag sequence and contacting the peptide with a biarsenical molecular probe. A complex is formed comprising the tag sequence and the molecular probe. A method of studying a peptide includes providing a mixture containing a peptide comprising a peptide tag sequence, adding a biarsenical probe to the mixture, and monitoring the fluorescence of the mixture.

L'invention concerne une sonde moléculaire qui comprend deux atomes d'arsenic et au moins une fraction basée sur la cyanine. Un procédé de production de sonde moléculaire consiste à produire une molécule possédant une première formule, à traiter la molécule avec du HgOAc, puis à la transmétalliser avec de l'AsCI3. L'As est lié à de l'éthanedithiol afin de produire une sonde possédant une seconde formule. Un procédé d'étiquetage d'un peptide consiste à fournir une séquence d'étiquette et à mettre en contact le peptide avec une sonde moléculaire biarsénicale. Un complexe comprenant la séquence d'étiquette et la sonde moléculaire est formé. L'invention concerne également un procédé d'anaylse d'un peptide qui consiste à produire un mélange contenant un peptide à séquence d'étiquette peptidique, à ajouter une sonde biarsénicale au mélange, et à surveiller la fluorescence du mélange.

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