Cloning and expression of the cDNA coding for aequorin, a bioluminescent calcium-binding protein
- PMID: 2579647
- DOI: 10.1016/0006-291x(85)90321-3
Cloning and expression of the cDNA coding for aequorin, a bioluminescent calcium-binding protein
Abstract
Aequorin is a bioluminescent protein which consists of a polypeptide chain (apoaequorin), coelenterate luciferin, and bound oxygen. Aequorin produces blue light upon binding Ca2+. We have isolated six recombinant pBR322 plasmids which contain apoaequorin cDNA sequences. A mixed synthetic pBR322 plasmids which contain apoaequorin cDNA sequences. A mixed synthetic oligonucleotide probe was used to identify these cDNAs. An extract of an E. coli strain possessing the largest cDNA contained apoaequorin. This apoaequorin can be converted to aequorin in the presence of coelenterate luciferin, 2-mercaptoethanol, and O2. This cDNA is therefore apparently full-length.
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