Article
Crystal structure of obelin after Ca2+-triggered bioluminescence suggests neutral coelenteramide as the primary excited state.
Proceedings of the National Academy of Sciences of the United States of America - 21 Feb 2006
Liu Zhi-Jie, Stepanyuk Galina A, Vysotski Eugene S, Lee John, Markova Svetlana V, Malikova Natalia P, Wang Bi-Cheng
Abstract excerpt
The crystal structure at 1.93-A resolution is determined for the Ca2+-discharged obelin containing three bound calcium ions as well as the product of the bioluminescence reaction, coelenteramide. This finding extends the series of available spatial structures of the ligand-dependent conformations of the protein to four, the obelin itself, and those after the bioluminescence reaction with or without bound Ca2+...
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