A role for the ESCRT system in cell division in archaea.

A role for the ESCRT system in cell division in archaea.
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ESCRT系统在古细胞分裂中的作用。

DOI:
10.1126/science.1165322
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发表时间:
2008-12-12
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Bell SD
Bell SD
中科院分区:
其他
文献类型:
--
作者:
Samson RY;Obita T;Freund SM;Williams RL;Bell SD

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古生菌是缺乏膜结构的原核生物。然而,一些Crenarchaea属的超嗜热成员,包括Sulfolobus属的成员,编码真核内体分选系统成分Vps4和ESCRT-III(运输所需的内体分选复合体-III)的同源物。我们发现Sulfolobus ESCRT-III和Vps4同源物在细胞周期中表达受到调控。这些蛋白质相互作用,我们建立了这种相互作用的结构基础。此外,这些蛋白在细胞分裂过程中特异性定位于细胞中间。在Sulfolobus中过度表达催化失活的突变体Vps4导致细胞增大,表明细胞分裂失败。因此,古细菌ESCRT系统在细胞分裂中起关键作用。
Archaea are prokaryotic organisms that lack endomembrane structures. However, a number of hyperthermophilic members of the Kingdom Crenarchaea, including members of the Sulfolobus genus, encode homologs of the eukaryotic endosomal sorting system components Vps4 and ESCRT-III (endosomal sorting complex required for transport - III). We found that Sulfolobus ESCRT-III and Vps4 homologs underwent regulation of their expression during the cell cycle. The proteins interacted and we established the structural basis of this interaction. Furthermore, these proteins specifically localized to the mid-cell during cell division. Over-expression of a catalytically inactive mutant Vps4 in Sulfolobus resulted in the accumulation of enlarged cells, indicative of failed cell division. Thus, the archaeal ESCRT system plays a key role in cell division.
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发表时间: 2007-10-11
期刊: NATURE
影响因子: 64.8
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