Three Brachypodium distachyon Uev1s Promote Ubc13-Mediated Lys63-Linked Polyubiquitination and Confer Different Functions.

Three Brachypodium distachyon Uev1s Promote Ubc13-Mediated Lys63-Linked Polyubiquitination and Confer Different Functions.
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三个短柄草 Uev1 促进 Ubc13 介导的 Lys63 连接的多泛素化并赋予不同的功能。

DOI:
10.3389/fpls.2016.01551
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发表时间:
2016
影响因子:
5.6
通讯作者:
Xiao W
Xiao W
中科院分区:
生物学2区
文献类型:
--
作者:
Guo H;Wen R;Wang Q;Datla R;Xiao W

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在这项研究中,我们报告了三个短柄草UEV基因的鉴定和功能特征。所有三个BdUev1与BdUbc13形成异二聚体,其能够在体外催化Lys63连接的多聚泛素化。这三个BdUEV1基因也能够在功能上补充芽殖酵母mms2突变体在DNA损伤耐受性方面的缺陷。BdUev1A与其他两种BdUev1s的不同之处在于它含有一个18个氨基酸的尾巴,这似乎会损害它在酵母中的功能,因为删除这个尾巴可以恢复全部功能。BdUev1A被排除在细胞核之外,而BdUev1B、BdUev1C和C端截短的BdUev1A主要存在于细胞核中。这些和BdUEV1基因表达分析使我们能够推测,虽然所有三个BdUev1s通过促进Lys63连接的多聚泛素化发挥作用,但BdUev1B和BdUev1C参与DNA损伤反应和可能的其他核功能,而BdUev1A是非核功能所必需的。
In this study, we report the identification and functional characterization of three Brachypodium distachyon UEV genes. All three BdUev1s form heterodimers with BdUbc13s, which are capable of catalyzing Lys63-linked polyubiquitination in vitro. The three BdUEV1 genes are also able to functionally complement the budding yeast mms2 mutant defective in DNA-damage tolerance. BdUev1A differs from the other two BdUev1s in that it contains an 18-amino acid tail, which appears to compromise its function in yeast, as deletion of this tail restores full function. BdUev1A is excluded from the nucleus, whereas BdUev1B, BdUev1C and the C-terminally truncated BdUev1A are mainly found in the nucleus. These and the BdUEV1 gene expression analysis allow us to speculate that although all three BdUev1s function by promoting Lys63-linked polyubiquitination, BdUev1B and BdUev1C are involved in DNA-damage response and possibly other nuclear functions, while BdUev1A is required for non-nuclear function(s).
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