Branciamore Sergio, Gallori Enzo, Di Giulio Massimo
Department of Animal Biology and Genetics, University of Florence, Via Romana 17/19, 50125 Florence, Italy.
Front Biosci. 2008 May 1;13:6886-92. doi: 10.2741/3196.
Using sequences of ribosomal RNA from organisms belonging exclusively to the Archaea domain and by means of two methods to remove the phylogenetic noise, we investigate the phylogenetic position of Nanoarchaeum equitans. The results obtained are compatible with the hypothesis that N. equitans represents a new phylum within the Archaea domain because the characteristic long branch of N. equitans in phylogenetic trees is conserved even after most of the phylogenetic noise has been removed, thus implying that its rRNA might indeed be singular. However, our analysis is unable to be equally as clear on the phylogenetic position of Methanopyrus kandleri.
利用仅属于古菌域生物的核糖体RNA序列，并通过两种方法去除系统发育噪声，我们研究了嗜热栖热菌的系统发育位置。获得的结果与以下假设相符：嗜热栖热菌代表古菌域内的一个新门，因为即使在去除大部分系统发育噪声后，嗜热栖热菌在系统发育树中的特征长分支仍然保留，这意味着其rRNA可能确实独特。然而，我们的分析对于坎氏甲烷嗜热菌的系统发育位置无法同样明确。
