An ENU mutagenesis screen identifies novel and known genes involved in epigenetic processes in the mouse.

An ENU mutagenesis screen identifies novel and known genes involved in epigenetic processes in the mouse.
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DOI:
10.1186/gb-2013-14-9-r96
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发表时间:
2013
期刊:
影响因子:
12.3
通讯作者:
Whitelaw E
Whitelaw E
中科院分区:
生物学1区
文献类型:
--
作者:
Daxinger L;Harten SK;Oey H;Epp T;Isbel L;Huang E;Whitelaw N;Apedaile A;Sorolla A;Yong J;Bharti V;Sutton J;Ashe A;Pang Z;Wallace N;Gerhardt DJ;Blewitt ME;Jeddeloh JA;Whitelaw E

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我们使用致敏 ENU 诱变筛选来生产携带表观遗传调控所需基因突变的小鼠品系。我们将这些系称为鼠亚稳态表观等位基因的修饰符(Mommes)。我们报告了 20 个 Momme 小鼠品系的基本分子和表型特征,并且在每种情况下我们还确定了致病突变。其中三个品系携带一种新型表观遗传修饰因子重排 L-myc 融合体 (Rlf) 突变,以及一个基因 Rap 相互作用因子 1 (Rif1),此前从未报道过该基因参与哺乳动物的转录调控。许多其他品系是已知表观遗传调节因子的新等位基因。对于 Rlf 和宽间隔锌指 (Wiz) 这两个基因,我们描述了第一个小鼠突变体。所有 Momme 突变体都表现出一定程度的纯合胚胎致死性,强调了表观遗传过程的重要性。在许多情况下,致死率的外显率是不完全的。类似地,在某些品系的杂合个体中观察到的表型异常发生在不完全外显率的情况下。测序方面的最新进展增强了敏化诱变筛选的能力,以识别先前未表征的因子的功能并发现先前表征的蛋白质的其他功能。对这些近交突变小鼠在不同发育阶段的表型不完全外显率的观察很有趣。总体而言,Momme 小鼠突变体收藏为多个学科的研究人员提供了宝贵的资源。
We have used a sensitized ENU mutagenesis screen to produce mouse lines that carry mutations in genes required for epigenetic regulation. We call these lines Modifiers of murine metastable epialleles (Mommes). We report a basic molecular and phenotypic characterization for twenty of the Momme mouse lines, and in each case we also identify the causative mutation. Three of the lines carry a mutation in a novel epigenetic modifier, Rearranged L-myc fusion (Rlf), and one gene, Rap-interacting factor 1 (Rif1), has not previously been reported to be involved in transcriptional regulation in mammals. Many of the other lines are novel alleles of known epigenetic regulators. For two genes, Rlf and Widely-interspaced zinc finger (Wiz), we describe the first mouse mutants. All of the Momme mutants show some degree of homozygous embryonic lethality, emphasizing the importance of epigenetic processes. The penetrance of lethality is incomplete in a number of cases. Similarly, abnormalities in phenotype seen in the heterozygous individuals of some lines occur with incomplete penetrance. Recent advances in sequencing enhance the power of sensitized mutagenesis screens to identify the function of previously uncharacterized factors and to discover additional functions for previously characterized proteins. The observation of incomplete penetrance of phenotypes in these inbred mutant mice, at various stages of development, is of interest. Overall, the Momme collection of mouse mutants provides a valuable resource for researchers across many disciplines.
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DOI: 10.1016/j.molcel.2013.01.001
发表时间: 2013-03-07
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