Method of screening for specific binding interactions
First Claim
1. A method for detecting the binding of a test compound to a probe molecule, said method comprising:
- providing a test compound, said test compound having a first fluorophore bound thereto;
providing a screening substrate, said screening substrate comprising a solid support, a probe molecule bound to said solid support, and a second fluorophore bound to said solid support adjacent said probe molecule;
wherein said first and second fluorophores together comprise a donor and an acceptor fluorophore of a fluorescence resonance energy transfer pair;
contacting said test compound to said screening substrate;
illuminating said screening substrate with light at a wavelength that is absorbed by said donor fluorophore; and
then detecting the transfer of energy to said acceptor fluorophore, the transfer of energy to said acceptor fluorophore indicating the binding of said test compound to said probe.
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Abstract
A method for detecting the binding of a test compound to a probe molecule comprises providing a test compound, the test compound having a first fluorophore bound thereto, and providing a screening substrate. The screening substrate comprises a solid support, a probe molecule bound to the solid support, and a second fluorophore bound to the solid support adjacent the probe molecule. An advantage of the invention is that this obviates the need for binding the second fluorophore directly to the probe molecule. Preferably, the second fluorophore is bound to the solid support by a flexible linker group. This enables the second fluorophore to interogate different positions on the probe molecule, which is also bound to the solid support adjacent the linker group, enhancing the ability of the method of the invention to detect positive binding events (specific binding of the test compound to the probe molecule. The first and second fluorophores together comprise the donor and acceptor fluorophores of a fluorescence resonance energy transfer (FRET) pair, or a “donor/acceptor pair.” The test compound is contacted to the screening substrate, and the screening substrate illuminated with light at a wavelength that is absorbed by the donor fluorophore. The transfer of energy from one to the other fluorophore is then detected, with the transfer of energy indicating the binding of the test compound to the probe. Substrates useful for carrying out the foregoing methods are also disclosed.
31 Citations
35 Claims
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1. A method for detecting the binding of a test compound to a probe molecule, said method comprising:
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providing a test compound, said test compound having a first fluorophore bound thereto;
providing a screening substrate, said screening substrate comprising a solid support, a probe molecule bound to said solid support, and a second fluorophore bound to said solid support adjacent said probe molecule;
wherein said first and second fluorophores together comprise a donor and an acceptor fluorophore of a fluorescence resonance energy transfer pair;
contacting said test compound to said screening substrate;
illuminating said screening substrate with light at a wavelength that is absorbed by said donor fluorophore; and
thendetecting the transfer of energy to said acceptor fluorophore, the transfer of energy to said acceptor fluorophore indicating the binding of said test compound to said probe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A screening substrate useful for the high throughput screening of molecular interactions, said substrate comprising:
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a solid support having a surface portion, said surface portion comprising a plurality of discreet known regions;
a plurality of different probe molecules bound to said surface portion, with different probe molecules positioned on said surface portion in different ones of said discrete known regions; and
a plurality of the same fluorophores connected to said surface portion, said fluorophores positioned on said surface portion in all of said plurality of discreet known regions. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 30, 31, 32, 33, 34, 35)
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22. A mixture useful for the high throughput screening of molecular interactions, said mixture comprising:
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a plurality of discreet solid supports each having a surface portion, each such support having a different probe molecule bound to the surface portion thereof, and a plurality of the same fluorophores bound to the surface portion of each of said solid supports. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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Specification