Unanimous Model for Describing the Fast Bioluminescence Kinetics of Ca2+-regulated Photoproteins of Different Organisms
2017
Eremeeva, Elena V. | Bartsev, Sergey I. | van Berkel, Willem J.H. | Vysotski, Eugene S.
Upon binding their metal ion cofactors, Ca2+-regulated photoproteins display a rapid increase of light signal, which reaches its peak within milliseconds. In the present study, we investigate bioluminescence kinetics of the entire photoprotein family. All five recombinant hydromedusan Ca2+-regulated photoproteins-aequorin from Aequorea victoria, clytin from Clytia gregaria, mitrocomin from Mitrocoma cellularia and obelins from Obelia longissima and Obelia geniculata-demonstrate the same bioluminescent kinetics pattern. Based on these findings, for the first time we propose a unanimous kinetic model describing the bioluminescence mechanism of Ca2+-regulated photoproteins.
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