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Learn MoreCCCTC binding factor (CTCF) is an important factor in the maintenance of chromatin chromatin interactions, yet the mechanism regulating its binding to chromatin is unknown. We demonstrate that zinc finger protein 143 (ZNF143) is a key regulator for CTCF bound promoter enhancer loops. In the murine genome, a large percentage of CTCF and ZNF143 DNA binding motifs are distributed 37 bp apart in the convergent orientation. Furthermore, deletion of ZNF143 leads to loss of CTCF binding on promoter and enhancer regions associated with gene expression changes. CTCF bound promoter enhancer loops are also disrupted after excision of ZNF143. ZNF143 CTCF bound promoter enhancer loops regulate gene expression patterns essential for maintenance of murine hematopoietic stem and progenitor cell integrity. Our data suggest a common feature of gene regulation that ZNF143 is a critical factor for CTCF bound promoter enhancer loops. SOURCE: Qi-Ling Zhou (a0126780@u.nus.edu) - Daniel G. Tenen's lab National University of Sigapore
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