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Modified bioluminescent proteins and their use

  • US 5,683,888 A
  • Filed: 07/05/1994
  • Issued: 11/04/1997
  • Est. Priority Date: 07/22/1989
  • Status: Expired due to Fees
First Claim
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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.

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