Comparing anterior and posterior Hox complex formation reveals guidelines for predicting cis-regulatory elements.
Comparing anterior and posterior Hox complex formation reveals guidelines for predicting cis-regulatory elements.
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比较前部和后部 Hox 复合体的形成揭示了预测顺式调控元件的指南。
DOI:
10.1016/j.ydbio.2010.04.004
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发表时间:
2010
影响因子:
2.7
通讯作者:
Gebelein,Brian
中科院分区:
文献类型:
--
作者:
Uhl,JuliD;Cook,TiffanyA;Gebelein,Brian
Hox transcription factors specify numerous cell fates along the anterior–posterior axis by regulating the expression of downstream target genes. While expression analysis has uncovered large numbers of de-regulated genes in cells with altered Hox activity, determining which are direct versus indirect targets has remained a significant challenge. Here, we characterize the DNA binding activity of Hox transcription factor complexes on eight experimentally verified cis-regulatory elements. Hox factors regulate the activity of each element by forming protein complexes with two cofactor proteins, Extradenticle (Exd) and Homothorax (Hth). Using comparative DNA binding assays, we found that a number of flexible arrangements of Hox, Exd, and Hth binding sites mediate cooperative transcription factor complexes. Moreover, analysis of a Distal-less regulatory element (DMXR) that is repressed by abdominal Hox factors revealed that suboptimal binding sites can be combined to form high affinity transcription complexes. Lastly, we determined that the anterior Hox factors are more dependent upon Exd and Hth for complex formation than posterior Hox factors. Based upon these findings, we suggest a general set of guidelines to serve as a basis for designing bioinformatics algorithms aimed at identifying Hox regulatory elements using the wealth of recently sequenced genomes.
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影响因子:
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作者:
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通讯作者:
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DOI:
10.1073/pnas.90.16.7666
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影响因子:
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DOI:
10.1073/pnas.0409700102
发表时间:
2005-02-15
影响因子:
11.1
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通讯作者:
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影响因子:
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作者:
Hueber, Stefanie D.;Bezdan, Daniela;Lohmann, Ingrid
通讯作者:
Lohmann, Ingrid