Phylogeny of lobose amoebae based on actin and small-subunit ribosomal RNA genes
Phylogeny of lobose amoebae based on actin and small-subunit ribosomal RNA genes
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DOI：
10.1093/molbev/msg201
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发表时间：
2003-11-01
影响因子：
10.7
通讯作者：
Pawlowski, J
中科院分区：
文献类型：
--
作者：
Fahrni, JF;Bolivar, I;Pawlowski, J
叶状变形虫是丰富的自由生活的原生生物和重要的病原体，但其进化历史和在宇宙生命树中的位置知之甚少。叶状变形虫的分子数据仅限于少数几个物种，迄今为止发表的所有系统发育研究都缺乏它们许多分类群的代表。在这里，我们分析了肌动蛋白和小亚基核糖体RNA（SSU rRNA）基因序列的一个广泛的分类群采样裸，叶状阿米巴。我们的研究结果支持存在一个单系阿米巴分支，其中包括所有的叶状阿米巴研究到目前为止，amitochondriate pelobionts和entamoebids，和黏菌。肌动蛋白和SSU rRNA基因区分两个明确的分支变形虫，“Gymnamoebia sensu stricto”和Archamoebia（pelobions + entamoebids），和一个弱支持和解决不好的组，包括一些裸露的，叶状变形虫和Mycetozoa。
Lobose amoebae are abundant free-living protists and important pathogenic agents, yet their evolutionary history and position in the universal tree of life are poorly known. Molecular data for lobose amoebae are limited to a few species, and all phylogenetic studies published so far lacked representatives of many of their taxonomic groups. Here we analyze actin and small-subunit ribosomal RNA (SSU rRNA) gene sequences of a broad taxon sampling of naked, lobose amoebae. Our results support the existence of a monophyletic Amoebozoa clade, which comprises all lobose amoebae examined so far, the amitochondriate pelobionts and entamoebids, and the slime molds. Both actin and SSU rRNA phylogenies distinguish two well-defined clades of amoebae, the "Gymnamoebia sensu stricto" and the Archamoebae (pelobionts + entamoebids), and one weakly supported and ill-resolved group comprising some naked, lobose amoebae and the Mycetozoa.