Yamada T, Songsri P, Tamura K
Department of Fermentation Technology, Faculty of Engineering, Hiroshima University, Japan.
Nucleic Acids Symp Ser. 1995(34):119-20.
The nucleotide sequences of two self-splicing group I introns found in viruses that infect the eukaryotic green alga Chlorella were compared with those of 19 nuclear group I introns of 11 green algae, 1 red alga, 2 yeasts and 1 protist. The similarity ranging from 69.5% to 89.0% in any comparison strongly suggested a close relatedness of these introns. Since this kind of viruses infect algal cells residing in protists such as Paramecium, they may serve as a mediator to spread group I introns horizontally among organisms of different phylogenetic kingdoms.
在感染真核绿藻小球藻的病毒中发现的两个自我剪接的I类内含子的核苷酸序列，与11种绿藻、1种红藻、2种酵母和1种原生生物的19个核I类内含子的核苷酸序列进行了比较。在任何比较中，相似度在69.5%至89.0%之间，这强烈表明这些内含子具有密切的亲缘关系。由于这类病毒感染存在于诸如草履虫等原生生物中的藻类细胞，它们可能充当一种媒介，在不同系统发育界的生物体之间水平传播I类内含子。
