The tetratricopeptide repeats of receptors involved in protein translocation across membranes.

The tetratricopeptide repeats of receptors involved in protein translocation across membranes.
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参与蛋白质跨膜易位的受体的四肽重复。

DOI:
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发表时间:
2007
影响因子:
10.7
通讯作者:
E. Schleiff
E. Schleiff
中科院分区:
生物学1区
文献类型:
--
作者:
Thomas Schlegel;O. Mirus;A. von Haeseler;E. Schleiff

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多肽的跨膜转运是每个细胞中普遍而必要的过程。这个过程是由可溶的和膜插入的蛋白质组成的分子机器所利用的。存在于不同膜中的分子转运机器的至少一个组成部分包含一个亚基,其结构域由3个四肽重复(TPR)基序组成。这些结构域对蛋白质之间的相互作用很重要,例如对伴侣蛋白的识别。为了了解这些包含TPR结构域的受体参与蛋白质易位的进化,我们推断了它们的系统发育关系。我们发现,与其他序列相比,这些TPR结构域的进化速率降低了。这种减少是由TPR结构域与其底物的相互作用解释的。基于TPR树,我们提出Sec72识别Hsp70, Tom34识别Hsp90。系统发育可以进一步用于将Toc64同工型定位于线粒体或叶绿体。我们的研究结果在易位系统进化发展的背景下进行了讨论,重点是在这些机器中识别Hsp70/ hsp90的TPR结构域的发生。
Transport of polypeptides across membranes is a general and essential process in every cell. This process is utilized by molecular machines composed of soluble and membrane-inserted proteins. At least one component of the molecular transport machines present in different membranes contains a subunit with a domain composed of 3 tetratricopeptide repeat (TPR) motifs. These domains are important for protein-protein interaction, for example, recognition of chaperones. To understand the evolution of these TPR domain-containing receptors involved in protein translocation, we inferred their phylogenetic relationships. We show that the evolutionary rate of these TPR domains is reduced when compared with the remaining sequence. The reduction is explained by the interaction of the TPR domains with their substrates. Based on the TPR tree, we propose that Sec72 recognizes Hsp70 and that Tom34 recognizes Hsp90. The phylogeny can further be used to assign the localization of the Toc64 isoforms to mitochondria or chloroplasts. Our findings are discussed in the context of the evolutionary development of translocation systems with focus on the occurrence of Hsp70/Hsp90-recognizing TPR domains in these machineries.
DOI: 10.1016/j.jmb.2004.08.026
发表时间: 2004-10-22
影响因子: 5.6
作者:
Magliery, TJ;Regan, L
通讯作者: Regan, L
酵母双杂交筛选鉴定出具有 ATP 酶活性并与细胞质中的 Tom34 形成复合物的人 Tom34 的结合伴侣。
DOI: 10.1006/abbi.2002.2778
发表时间: 2002
期刊: Archives of biochemistry and biophysics.
影响因子: --
作者:
Yang,Chun-Song;Weiner,Henry
通讯作者: Weiner,Henry
DOI: 10.1042/bj20070084
发表时间: 2007-05-15
影响因子: 4.1
作者:
Flom, Gary;Behal, Robert H.;Johnson, Jill L.
通讯作者: Johnson, Jill L.