Multiple domain insertions and losses in the evolution of the Rab prenylation complex.

Multiple domain insertions and losses in the evolution of the Rab prenylation complex.
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DOI:
10.1186/1471-2148-7-140
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发表时间:
2007-08-17
影响因子:
3.4
通讯作者:
Pereira-Leal, Jose B.
Pereira-Leal, Jose B.
中科院分区:
生物学2区
文献类型:
--
作者:
Rasteiro, Rita;Pereira-Leal, Jose B.

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RAB蛋白是囊泡运输的调节者,需要对脂类进行修饰才能发挥正确的功能,即C-末端半胱氨酸的预烯基化。这是由催化的异二聚体(Rab Geranylgeranyl Transferase-RabGGTase)和辅助蛋白(Rab Escalt Protein)组成的复合体催化的。代表)。该复合体的组份显示与同源蛋白相关的结构域插入。这些插入结构域的功能尚不清楚。我们描述了Rab预烯基化复合体在进化过程中的结构域结构。我们在43个生物中鉴定了Rab预烯基化机制各组成部分的同源基因,这些生物代表了冠状真核生物群体。我们详细描述了所有这些组件的结构域结构以及各个结构域之间的系统发育关系。我们在不同的类群中发现了不同的结构域插入,在RGGTase和REP的α亚基中。我们的结果表明,在这个预烯基化复合体的进化过程中,存在着多次插入、扩张和收缩。
Rab proteins are regulators of vesicular trafficking, requiring a lipid modification for proper function, prenylation of C-terminal cysteines. This is catalysed by a complex of a catalytic heterodimer (Rab Geranylgeranyl Transferase – RabGGTase) and an accessory protein (Rab Escort Protein. REP). Components of this complex display domain insertions relative to paralogous proteins. The function of these inserted domains is unclear. We profiled the domain architecture of the components of the Rab prenylation complex in evolution. We identified the orthologues of the components of the Rab prenylation machinery in 43 organisms, representing the crown eukaryotic groups. We characterize in detail the domain structure of all these components and the phylogenetic relationships between the individual domains. We found different domain insertions in different taxa, in α-subunits of RGGTase and REP. Our results suggest that there were multiple insertions, expansions and contractions in the evolution of this prenylation complex.
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