Genome-wide analysis of ETS-family DNA-binding in vitro and in vivo.

Genome-wide analysis of ETS-family DNA-binding in vitro and in vivo.
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DOI:
10.1038/emboj.2010.106
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发表时间:
2010-07-07
期刊:
影响因子:
11.4
通讯作者:
Taipale, Jussi
Taipale, Jussi
中科院分区:
生物学1区
文献类型:
--
作者:
Wei, Gong-Hong;Badis, Gwenael;Berger, Michael F.;Kivioja, Teemu;Palin, Kimmo;Enge, Martin;Bonke, Martin;Jolma, Arttu;Varjosalo, Markku;Gehrke, Andrew R.;Yan, Jian;Talukder, Shaheynoor;Turunen, Mikko;Taipale, Mikko;Stunnenberg, Hendrik G.;Ukkonen, Esko;Hughes, Timothy R.;Bulyk, Martha L.;Taipale, Jussi

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转录因子大家族的成员具有高度相似的DNA结合结构域(DBD),但它们在生理学和肿瘤发生中具有不同的功能和活性。在这个家庭内的DNA结合偏好的一些差异已被描述,但他们还没有被系统地分析,他们的目标仍然在很大程度上是未知的贡献。我们在这里报告的所有人类和小鼠ETS因子,我们使用两种不同的方法产生的DNA结合概况:高通量微孔为基础的TF DNA结合特异性测定,和蛋白结合微阵列(PBMs)。这两种方法都揭示了ETS结合谱聚类为四个不同的类别,并且与癌症相关的所有ETS因子,ERG,ETV 1,ETV 4和FLI 1,都属于这些类别中的一个。我们确定的氨基酸残基是关键的所有类别之间的特异性差异,并确认在体内使用染色质免疫沉淀,然后测序(ChIP-seq)的每个类别的成员的特异性。结果表明,即使相对较小的差异,在体外结合特异性的TF有助于在体内的网站选择性。
Members of the large ETS family of transcription factors (TFs) have highly similar DNA-binding domains (DBDs)—yet they have diverse functions and activities in physiology and oncogenesis. Some differences in DNA-binding preferences within this family have been described, but they have not been analysed systematically, and their contributions to targeting remain largely uncharacterized. We report here the DNA-binding profiles for all human and mouse ETS factors, which we generated using two different methods: a high-throughput microwell-based TF DNA-binding specificity assay, and protein-binding microarrays (PBMs). Both approaches reveal that the ETS-binding profiles cluster into four distinct classes, and that all ETS factors linked to cancer, ERG, ETV1, ETV4 and FLI1, fall into just one of these classes. We identify amino-acid residues that are critical for the differences in specificity between all the classes, and confirm the specificities in vivo using chromatin immunoprecipitation followed by sequencing (ChIP-seq) for a member of each class. The results indicate that even relatively small differences in in vitro binding specificity of a TF contribute to site selectivity in vivo.
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