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Integration of External Signaling Pathways with the Core Transcriptional Network in Embryonic Stem Cells Transcription factors (TFs) and their specific interactions with targets are crucial for specifying gene-expression programs. To gain insights into the transcriptional regulatory networks in embryonic stem (ES) cells, we use chromatin immunoprecipitation coupled with ultra-high-throughput DNA sequencing (ChIP-seq) to map the locations of 13 sequence-specific TFs (Nanog, Oct4, STAT3, Smad1, Sox2, Zfx, c-Myc, n-Myc, Klf4, Esrrb, Tcfcp2l1, E2f1, and CTCF) and 2 transcription regulators (p300 and Suz12). These factors are known to play different roles in ES-cell biology as components of the LIF and BMP signaling pathways, self-renewal regulators, and key reprogramming factors. Our study provides insights into the integration of the signaling pathways into the ES-cell-specific transcription circuitries. Intriguingly, we find specific genomic regions extensively targeted by different TFs. Collectively, the comprehensive mapping of TF-binding sites identifies important features of the transcriptional regulatory networks that define ES-cell identity. |
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binxman(½ð±Ò+60, ·ÒëEPI+1): лл£¡Ì«¸ÐлÁË£¡Äܽ»¸öÅóÓÑÂð£¿584840913 2011-10-20 22:53:12
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ÅßÌ¥¸Éϸ°ûµÄÍⲿÐźÅͨ·ÓëÄÚ²¿×ªÂ¼ÍøÂçµÄÕûºÏ ת¼Òò×Ó(TFs)¼°ÆäÓë°Ð»ùÒòÖ®¼äµÄÌØÒìÐÔÏ໥×÷ÓÃÊÇ˵Ã÷»ùÒò±í´ï³ÌÐòµÄ¹Ø¼ü¡£ÎªÁËÉîÈëÀí½âESϸ°ûµÄת¼µ÷½ÚÍøÂ磬ÎÒÃÇÓÃȾɫÖÊÃâÒß³Áµí·¨ºÍ³¬¸ßͨÁ¿DNA²âÐò(ChIP-seq)À´³ÊÏÖ13ÖÖTFs (Nanog, Oct4, STAT3, Smad1, Sox2, Zfx, c-Myc, n-Myc, Klf4, Esrrb, Tcfcp2l1, E2f1, and CTCF)ºÍ2ÖÖת¼µ÷½ÚÒò×Ó(p300 and Suz12)µÄλÖá£ÒÑÖªÕâЩÒò×ÓÔÚÅßÌ¥¸Éϸ°ûÉúÎïѧÖÐÆð²»Í¬µÄ×÷Ó㬰üÀ¨LIFºÍBMPÐźÅͨ·µÄ×é³É²¿·Ö¡¢×ÔÎÒ¸üÐÂÒò×Ӻ͹ؼüµÄÖØÐ±à³ÌÒò×Ó¡£ÎÒÃǵÄÑо¿ÌṩÁËÈçÏÂÀí½â£º½«ÐźÅͨ·ÕûºÏµ½ESϸ°ûÌØÒìÐÔת¼µç·ÖÐÈ¥¡£ÓÐȤµÄÊÇ£¬ÎÒÃÇ·¢ÏÖ²»Í¬µÄTFs¹ã·ºµØÕë¶ÔÌØ¶¨»ùÒò×éÇøÓò¡£×ܵÄÀ´Ëµ£¬TF½áºÏλµãµÄÈ«Ãæ³ÊÏÖÈ·¶¨Á˾ö¶¨ESϸ°ûÖÖÀàµÄת¼µ÷½ÚÍøÂçµÄÖØÒªÌØµã¡£ |
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