Conserved tRNA gene cluster in starfish mitochondrial DNA |
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| Authors: | Howard T Jacobs Shuichi Asakawa Takeyoshi Araki Kin-ichiro Miura Michael J Smith Kimitsuna Watanabe |
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| Institution: | (1) Department of Genetics, University of Glasgow, Church Street, Glasgow, G11 5JS Scotland, UK;(2) Department of Industrial Chemistry, Faculty of Engineering, University of Tokyo, 113 Tokyo, Japan;(3) Institute of Molecular Biology and Biochemistry, Department of Biological Sciences, Simon Fraser University, V5A 1S6 Burnaby, B.C., Canada;(4) Department of Life Chemistry, Tokyo Institute of Technology, 227 Yokohama, Japan |
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| Abstract: | Summary Partial sequencing of mtDNA from four long-diverged species of starfish reveals the existence of a conserved cluster of 13 tRNA genes, organized in a manner similar to that of the tRNA cluster of sea urchin mtDNA, but located at a position distant from the presumed replication origin. These findings suggest that a clustered organization of tRNA genes may have been present in the ancestral mitochondrial genome, and raise the possibility that tRNAs may have catalyzed the dispersal rather than the accumulation of the genes which encode them. |
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| Keywords: | Starfish Mitochondrial DNA tRNA |
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