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SPECIES OF THE GENUS FILOBASIDIELLA DIFFER IN THE ORGANIZATION OF THEIR 5S RRNA GENES

机译:5S RRNA基因组织中FIBA的不同种类

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摘要

The genus Filobasidiella contains two species, F. neoformans and F. depauperata. The 5S ribosomal RNA genes in the two species were found to have completely different genomic arrangements. We previously reported that the 5S rRNA gene of F. neoformans, the type species of genus Filobasidiella, is located 1 kb upstream from the 18S rRNA gene within the 8.6-kb HindIII fragment of the ribosomal DNA repeat unit. The present study demonstrates the 5S rRNA gene to be absent from the rDNA repeat in F. depauperata, but is dispersed in the genome. Analysis of the nucleotide sequence from five randomly isolated 5S rDNA clones of F. depauperata showed heterogeneity at six different positions of the putative transcription region. The genus Filobasidiella is the first genus of Eumycota reported to have the 5S rRNA with two different genomic arrangements. [References: 35]
机译:Filobasidiella属包含两个物种,即新镰刀菌和F. depauperata。发现两个物种中的5S核糖体RNA基因具有完全不同的基因组排列。我们以前曾报道,F。neoformans的5S rRNA基因是Filobasidiella属的一种,位于18S rRNA基因上游1 kb,位于核糖体DNA重复单元的8.6 kb HindIII片段内。目前的研究表明,5S rRNA基因在F. depauperata中的rDNA重复序列中不存在,但分散在基因组中。分析来自五个分离的F.depauperata的5S rDNA克隆的核苷酸序列,显示在推定转录区的六个不同位置具有异质性。 Filobasidiella属是Eumycota的第一属,据报道其5S rRNA具有两个不同的基因组排列。 [参考:35]

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