Modified bioluminescent proteins and their use
First Claim
1. A modified bioluminescent protein selected from the group consisting of firefly luciferase, aequorin and obelin, modified to include an interaction site for a selected analyte, said site being not present in the unmodified protein, wherein the analyte interacts with said interaction site, the bioluminescent protein being reactive in a bioluminescent reaction to produce light, wherein the light is produced having a physical property of a first characteristic when the analyte is interacting with the interaction site, and is produced having a second different characteristic of said physical property when the analyte is not interacting with the interaction site;
- said interaction site being selected from the group consisting of kemptide covalently bound to the N or C terminus of firefly luciferase, kemptide covalently bound to the N terminus of aequorin, kemptide covalently bound to the N terminus of obelin, malantide covalently bound to the N terminus of aequorin, and an RRXS phosphorylation site at amino acid 217 of firefly luciferase.
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Accused Products
Abstract
A modified bioluminescent protein responds to different physical, chemical, biochemical or biological conditions to produce light or radiation of altered characteristics when the bioluminescent reaction is initiated. The modified bioluminescent protein may respond to modification thereof, e.g. by covalent modification. The protein may include signal peptides to "target" it. DNA coding for the bioluminescent protein may be altered to include tissue specific promoter or enhancer genes so that the altered DNA acts as reporter gene.
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Citations
10 Claims
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1. A modified bioluminescent protein selected from the group consisting of firefly luciferase, aequorin and obelin, modified to include an interaction site for a selected analyte, said site being not present in the unmodified protein, wherein the analyte interacts with said interaction site, the bioluminescent protein being reactive in a bioluminescent reaction to produce light, wherein the light is produced having a physical property of a first characteristic when the analyte is interacting with the interaction site, and is produced having a second different characteristic of said physical property when the analyte is not interacting with the interaction site;
- said interaction site being selected from the group consisting of kemptide covalently bound to the N or C terminus of firefly luciferase, kemptide covalently bound to the N terminus of aequorin, kemptide covalently bound to the N terminus of obelin, malantide covalently bound to the N terminus of aequorin, and an RRXS phosphorylation site at amino acid 217 of firefly luciferase.
- View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10)
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3. A modified bioluminescent protein selected from the group consisting of firefly luciferase, aequorin and obelin, modified to include an interaction site for a substance of interest, said site being not present in the unmodified protein and reactive in a bioluminescent reaction, wherein light emitted in said bioluminescent reaction involving said protein changes depending on the concentration of said substance of interest;
- said interaction site being selected from the group consisting of kemptide covalently bound to the N or C terminus of firefly luciferase, kemptide covalently bound to the N terminus of aequorin, kemptide covalently bound to the N terminus of obelin, malantide covalently bound to the N terminus of aequorin, and an RRXS phosphorylation site at amino acid 217 of firefly luciferase.
Specification