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首页> 外文期刊>Briefings in functional genomics & proteomics >Functional analysis of the role of POK transcrlptlonal repressors
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Functional analysis of the role of POK transcrlptlonal repressors

机译:POK经颅阻遏物作用的功能分析

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Transcription factors (TF) play a key role in certain mechanisms by which specific genes are expressed in a temporal and tissue-specific manner Understanding those mechanisms is still a challenging question in biology. Their modular organization allows the possibility of classifying them based on the structure of the domains that bind DNA or interact with other proteins. Those domains not only define the different TF families but also provide insights into the biological functions played by them. Among these, the POK (Poxviruses and Zinc-finger (POZ) and Kruppel) family of transcription repressors is characterized by the presence in their structures of an amino-terminal POZ/ Broad Complex, Tramtrack, and Brie a brae (BTB) domain and several Kruppel-type zinc fingers at the carboxy-terminal moiety The POZ/BTB domain mediates homo- and heterodimerization as well as protein-f>r/otein interactions, allowing the recruitment of corepressor complexes. On the other hand, the specific zinc fingers mediate specific DNA sequences recognition and binding. In the last few years, several reports have highlighted the importance that this family of transcriptional repressors plays in different processes such as cancer, development and stem cell biology.
机译:转录因子(TF)在某些机制中起着关键作用,通过这种机制可以以时间和组织特异性方式表达特定基因。了解这些机制仍然是生物学中一个具有挑战性的问题。它们的模块化组织使得可以根据结合DNA或与其他蛋白质相互作用的结构域对它们进行分类。这些域不仅定义了不同的TF家族,而且还提供了对它们发挥的生物学功能的见解。其中,转录阻遏物POK(Poxviruses和锌指(POZ)和Kruppel)家族的特征是在其结构中存在氨基末端POZ / Broad Complex,Tramtrack和Brie a brae(BTB)域,并且羧基末端部分的多个Kruppel型锌指。POZ / BTB域介导同二聚和异二聚化以及蛋白质-f / tein相互作用,从而可以募集共加压复合物。另一方面,特定的锌指介导特定的DNA序列识别和结合。在过去的几年中,一些报告强调了该转录阻遏物家族在不同过程(例如癌症,发育和干细胞生物学)中发挥的重要性。

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