Phylogenetic analysis of the Trypanosoma genus based on the heat-shock protein 70 gene

被引:13
|
作者
Fraga, Jorge [1 ]
Fernandez-Calienes, Ayme [1 ]
Margarita Montalvo, Ana [1 ]
Maes, Ilse [2 ]
Deborggraeve, Stijn [2 ]
Buscher, Philippe [2 ]
Dujardin, Jean-Claude [2 ,3 ]
Van der Auwera, Gert [2 ]
机构
[1] Inst Trop Med Pedro Kouri, Dept Parasitol, Havana, Cuba
[2] Inst Trop Med, Dept Biomed Sci, Nationalestr 155, B-2000 Antwerp, Belgium
[3] Univ Antwerp, Dept Biomed Sci, Antwerp, Belgium
关键词
Trypanosoma; Trypanozoon; Phylogeny; HSP70; Heat-shock protein; MOLECULAR CHAPERONES; CLINICAL-SAMPLES; CRUZI LINEAGES; RIBOSOMAL-RNA; HSP70; GENES; LEISHMANIA; RANGELI; EVOLUTION; BATS; DIVERSITY;
D O I
10.1016/j.meegid.2016.05.016
中图分类号
R51 [传染病];
学科分类号
100401 ;
摘要
Trypanosome evolution was so far essentially studied on the basis of phylogenetic analyses of small subunit ribosomal RNA (SSU-rRNA) and glycosomal glyceraldehyde-3-phosphate dehydrogenase (gGAPDH) genes. We used for the first time the 70 kDa heat-shock protein gene (hsp70) to investigate the phylogenetic relationships among 11 Trypanosoma species on the basis of 1380 nucleotides from 76 sequences corresponding to 65 strains. We also constructed a phylogeny based on combined datasets of SSU-rDNA, gGAPDH and hsp70 sequences. The obtained clusters can be correlated with the sections and subgenus classifications of mammal-infecting trypanosomes except for Trypanosoma theileri and Trypanosoma rangeli. Our analysis supports the classification of Trypanosoma species into clades rather than in sections and subgenera, some of which being polyphyletic. Nine clades were recognized: Trypanosoma carassi, Trypanosoma congolense, Trypanosoma cruzi, Trypanosoma grayi, Trypanosoma lewisi, T. rangeli, T. theileri, Trypanosoma vivax and Trypanozoon. These results are consistent with existing knowledge of the genus' phylogeny. Within the T. cruzi clade, three groups of T. cruzi discrete typing units could be clearly distinguished, corresponding to TcI, TcIII, and TcII + V + VI, while support for TcIV was lacking. Phylogenetic analyses based on hsp70 demonstrated that this molecular marker can be applied for discriminating most of the Trypanosoma species and clades. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:165 / 172
页数:8
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