Membrane transportable fluorescent substrates
First Claim
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1. A fluorescent substrate delivery system comprising an ionic complex of an enzyme active fluorescent substrate and a carrier molecule;
- wherein the fluorescent substrate comprises one or more anionic charge groups and the carrier molecule comprises one or more cationic charge groups, and wherein the complex is formed by ionic charge interactions between the one or more anionic charge groups of the fluorescent substrate and the one or more cationic charge groups of the carrier molecule.
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Abstract
Intracellular enzyme-activated fluorescent substrates that can be transported into a cell are provided. The membrane transportable fluorescent substrates are complexes (e.g., ionic complexes) formed between an enzyme activated fluorescent substrate and a carrier molecule. The fluorescent substrates can be used in an intracellular assay of enzyme activity and/or expression.
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Citations
33 Claims
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1. A fluorescent substrate delivery system comprising an ionic complex of an enzyme active fluorescent substrate and a carrier molecule;
wherein the fluorescent substrate comprises one or more anionic charge groups and the carrier molecule comprises one or more cationic charge groups, and wherein the complex is formed by ionic charge interactions between the one or more anionic charge groups of the fluorescent substrate and the one or more cationic charge groups of the carrier molecule. - View Dependent Claims (2, 3, 4, 5, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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6. A method for detecting the presence and/or measuring the activity of an enzyme in a cell comprising:
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a) contacting a sample comprising the cell with a composition comprising an ionic complex of an enzyme active fluorescent substrate and a carrier molecule, wherein the fluorescent substrate comprises one or more anionic charge groups and the carrier molecule comprises one or more cationic charge groups, and wherein the complex is formed by ionic charge interactions between the one or more anionic charge groups of the fluorescent substrate and the one or more cationic charge groups of the carrier molecule; and
b) detecting fluorescence from the sample;
wherein the presence of fluorescence indicates the presence of the enzyme in the cell and wherein the intensity of fluorescence indicates the activity or expression of the enzyme in the cell. - View Dependent Claims (7, 8, 9)
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Specification