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. 1985 May;82(10):3154–3158. doi: 10.1073/pnas.82.10.3154

Cloning and sequence analysis of cDNA for the luminescent protein aequorin.

S Inouye, M Noguchi, Y Sakaki, Y Takagi, T Miyata, S Iwanaga, T Miyata, F I Tsuji
PMCID: PMC397733  PMID: 3858813

Abstract

The luminescent jellyfish Aequorea contains a photoprotein, aequorin, which emits light by an intramolecular reaction in the presence of a trace amount of Ca2+. A cDNA library of Aequorea was constructed and clones carrying the cDNA for the Ca2+-dependent photoprotein were isolated by the method of colony hybridization using synthetic oligonucleotide probes. The primary structure of the protein deduced from the nucleotide sequence showed that the protein is composed of 189 amino acid residues and has three E-F hand structures that are characteristic for Ca2+-binding sites. The sequence also suggested that the protein has hydrophobic regions at which the protein may interact with its functional chromophore, coelenterazine.

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Selected References

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