Fluorescent metal ion indicators with large stokes shifts
First Claim
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1. A compound for the detection of metal ions, wherein the compound comprises:
- a metal chelating BAPTA moiety; and
,a fluorophore comprising a nitrogen atom covalently bonded to one or two C═
O groups or to one SO2 group, wherein the nitrogen atom is optionally substituted with a H, alkyl, or substituted alkyl group, wherein the nitrogen atom in the fluorophore is covalently bonded to the metal chelating moiety by a linker, —
(CR2)n—
, wherein each R group is independently hydrogen, alkyl, or substituted alkyl; and
n is 1-10.
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Abstract
The present invention provides fluorogenic compounds for the detection of target metal ions wherein the compounds exhibit a Stokes shift greater than 50 nm and the detectable signal is modulated by photoinduced electron transfer (PET). The present compounds consist of three functional elements, the ion sensing moiety (chelating moiety), the reporter moiety (fluorophore or fluorescent protein) and spacer or linker between the sensing and reporter moieties of the present compound that allows for PET upon binding of a metal ion and excitation by an appropriate wavelength.
72 Citations
11 Claims
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1. A compound for the detection of metal ions, wherein the compound comprises:
-
a metal chelating BAPTA moiety; and
,a fluorophore comprising a nitrogen atom covalently bonded to one or two C═
O groups or to one SO2 group, wherein the nitrogen atom is optionally substituted with a H, alkyl, or substituted alkyl group, wherein the nitrogen atom in the fluorophore is covalently bonded to the metal chelating moiety by a linker, —
(CR2)n—
, wherein each R group is independently hydrogen, alkyl, or substituted alkyl; and
n is 1-10. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification