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J Mol Biol. 2007 Dec 7;374(4):1017-28. Epub 2007 Oct 3.

Crystal structures of the luciferase and green fluorescent protein from Renilla reniformis.

Author information

1
Molecular Imaging Program at Stanford, Department of Radiology and Bio-X Program, The James H. Clark Center, Stanford University School of Medicine, 318 Campus Drive, Clark E150, Stanford, CA 94305-5427, USA.

Abstract

Due to its ability to emit light, the luciferase from Renilla reniformis (RLuc) is widely employed in molecular biology as a reporter gene in cell culture experiments and small animal imaging. To accomplish this bioluminescence, the 37-kDa enzyme catalyzes the degradation of its substrate coelenterazine in the presence of molecular oxygen, resulting in the product coelenteramide, carbon dioxide, and the desired photon of light. We successfully crystallized a stabilized variant of this important protein (RLuc8) and herein present the first structures for any coelenterazine-using luciferase. These structures are based on high-resolution data measured to 1.4 A and demonstrate a classic alpha/beta-hydrolase fold. We also present data of a coelenteramide-bound luciferase and reason that this structure represents a secondary conformational form following shift of the product out of the primary active site. During the course of this work, the structure of the luciferase's accessory green fluorescent protein (RrGFP) was also determined and shown to be highly similar to that of Aequorea victoria GFP.

PMID:
17980388
PMCID:
PMC2700051
DOI:
10.1016/j.jmb.2007.09.078
[Indexed for MEDLINE]
Free PMC Article

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