The Proteome of T. vaginalis Hydrogenosomes

The Proteome of T. vaginalis Hydrogenosomes
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阴道毛滴虫 Hydrogenosomes 的蛋白质组

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发表时间:
2007
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影响因子:
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通讯作者:
K. Henze
K. Henze
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作者:
K. Henze

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在独立的真核细胞谱系中氢酶体的出现意味着它们是从线粒体前辈进化而来的,线粒体前辈很可能在功能范围和蛋白质含量方面已经高度多样化。与线粒体相比,多个大规模的基因组和蛋白质组分析提供了不断增加的细胞器蛋白质含量和功能的覆盖范围,氢酶体主要是通过小规模的研究来描述的单一蛋白质或途径在非常少数的生物体。几个独立的分析,可以利用编译的初步清单的毛滴虫的氢体蛋白质组:多个实验研究单一的蛋白质或途径,基因产物预测的计算机算法,以包含一个N-末端靶向肽导入氢体,和蛋白质组学方法的基础上,纯化的氢体的2D电泳鉴定。在此基础上,对T.可以初步估计迷走神经氢酶体由至少约200种不同的蛋白质组成,但肯定明显少于酵母线粒体预测的700种蛋白质。这一估计将毛滴虫细胞器置于寄生生物或有丝分裂体中高度减少的线粒体的范围内。
The occurrence of hydrogenosomes in independent eukaryotic lineages implies that they evolved from mitochondrial predecessors which most likely were already highly diverse in functional range and protein content. In contrast to mitochondria, where multiple large-scale genome and proteome analyses provide a constantly increasing coverage of organellar protein content and functions, hydrogenosomes are mostly described by small-scale studies on single proteins or pathways in a very small number of organisms to date. Several independent analyses can be drawn upon to compile a preliminary inventory of the hydrogenosomal proteome in trichomonads: multiple experimental studies on single proteins or pathways, gene products predicted by a computer algorithm to contain an N-terminal targeting peptide for import into hydrogenosomes, and proteins identified by a proteomic approach based on 2D electrophoresis of purified hydrogenosomes. On the basis of these observations the proteome of T. vaginalis hydrogenosomes can be tentatively estimated to consist of at least about 200 different proteins, but certainly significantly less than the 700 proteins predicted for yeast mitochondria. This estimate puts the trichomonad organelles in the range of the highly reduced mitochondria in parasitic organisms or mitosomes.
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