Structure of the Ca2+-regulated photoprotein obelin at 1.7 A resolution determined directly from its sulfur substructure.
Liu, Z.J., Vysotski, E.S., Chen, C.J., Rose, J.P., Lee, J., Wang, B.C.(2000) Protein Sci 9: 2085-2093
- PubMed: 11152120 
- DOI: 10.1110/ps.9.11.2085
- Primary Citation of Related Structures:  
1EL4 - PubMed Abstract: 
The crystal structure of the photoprotein obelin (22.2 kDa) from Obelia longissima has been determined and refined to 1.7 A resolution. Contrary to the prediction of a peroxide, the noncovalently bound substrate, coelenterazine, has only a single oxygen atom bound at the C2-position ...