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J Biochem. 1996 Apr;119(4):601-3.

Truncation of Vargula luciferase still results in retention of luminescence.

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1
Department of Chemistry and Biotechnology, Graduate School of Engineering, University of Tokyo.

Abstract

Significant amino acid sequence homology in two regions of Vargula hilgendorfii to one in apoaequorin was reported. The intra-amino acid homology in Vargula luciferase between residues 81-312 and 321-540 was 19.3%, and each of this intra-homologous region contained the region homologous to apoaequorin. In order to prove the possibility that only one of the homologous regions is sufficient for luminescence, we have produced a chimeric protein comprising of only the N-terminal homologous region of Vargula luciferase fused to protein A. Comparison of the luminescence of this truncate luciferase indicated that there was 38.5% retention in the bioluminescence of luciferase when compared to that of the mature form of luciferase. This fact may have interesting implications for further study of engineering luciferase.

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