Transcriptome Analysis of Four Arabidopsis thaliana Mediator Tail Mutants Reveals Overlapping and Unique Functions in Gene Regulation.

Transcriptome Analysis of Four Arabidopsis thaliana Mediator Tail Mutants Reveals Overlapping and Unique Functions in Gene Regulation.
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DOI:
10.1534/g3.118.200573
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发表时间:
2018-08-30
期刊:
G3 (Bethesda, Md.)
影响因子:
--
通讯作者:
Chapple C
Chapple C
中科院分区:
其他
文献类型:
--
作者:
Dolan WL;Chapple C

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介体复合物是真核生物转录调控的核心组成部分。该复合物在结构上分为四个模块,称为头部,中部,尾部和激酶模块,在拟南芥中,包括28-34个亚基。在这里,我们探讨了四个拟南芥介体尾亚基,MED 2,MED 5a/B,MED 16和MED 23的功能,通过比较突变的影响,在每个拟南芥转录组。我们发现,这些亚基影响独特的和重叠的基因集,提供洞察它们之间的功能和结构关系。突变体主要表现为生物和非生物胁迫相关基因表达的变化。我们发现MED 23的组织特异性作用的证据,以及在替代转录的生产。总之,我们的数据有助于解开这些MED亚基对全球基因表达的个体贡献,并为未来研究其功能提出新的途径。
The Mediator complex is a central component of transcriptional regulation in Eukaryotes. The complex is structurally divided into four modules known as the head, middle, tail and kinase modules, and in Arabidopsis thaliana, comprises 28-34 subunits. Here, we explore the functions of four Arabidopsis Mediator tail subunits, MED2, MED5a/b, MED16, and MED23, by comparing the impact of mutations in each on the Arabidopsis transcriptome. We find that these subunits affect both unique and overlapping sets of genes, providing insight into the functional and structural relationships between them. The mutants primarily exhibit changes in the expression of genes related to biotic and abiotic stress. We find evidence for a tissue specific role for MED23, as well as in the production of alternative transcripts. Together, our data help disentangle the individual contributions of these MED subunits to global gene expression and suggest new avenues for future research into their functions.
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