Chromatin-binding in vivo of the erythroid kruppel-like factor,EKLF,in the murine globin loci  

作　　者：Yu-Chiau Shyu Shau-Ching Wen Tung-Liang Lee Xin Chen Chia-Tse Hsu Hsin Chen Ruei-Lin Chen Jau-Lang Hwang Che-Kun James Shen 

机构地区：[1]Institute of Molecular Biology,Academia Sinica,Nankang,Taipei 115 [2]Institute of Life Sciences,National Defense University,Nei-hu,Taipei 114 [3]Division of Biotechnology and Pharmaceutical Research,National Health Research Institutes,Zhunan Town,Miaoli County 350

出　　处：《Cell Research》2006年第4期347-355,共9页细胞研究（英文版）

摘　　要：EKLF is an erythroid-specific, zinc finger-containing transcription factor essential for the activation of the mammalian beta globin gene in erythroid cells of definitive lineage. We have prepared a polyclonal anti-mouse EKLF antibody suitable for Western blotting and immunoprecipitation （IP） qualities, and used it to define the expression patterns of the EKLF protein during mouse erythroid development. We have also used this antibody for the chromatin-immunoprecipitation （CHIP） assay. EKLF was found to bind in vivo at both the mouse beta-major-globin promoter and the HS2 site of beta-LCR in the mouse erythroleukemia cells （MEL） in a DMSO-inducible manner. The DMSO-induced bindings of EKLF as well as three other proteins, namely, RNA polymerase Ⅱ, acetylated histone H3, and methylated histone H3, were not abolished but significantly lowered in CB3, a MEL-derived cell line with null-expression of p45/NF-E2, an erythroid-enriched factor needed for activation of the mammalian globin loci. Interestingly, binding of EKLF in vivo was also detected in the mouse alpha-like globin locus, at the adult alpha globin promoter and its far upstream regulatory element alpha-MRE （HS26）. This study provides direct evidence for EKLF-binding in vivo at the major regulatory elements of the mouse beta-like globin gene clusters the data also have interesting implications with respect to the role of EKLF-chromatin interaction in mammalian globin gene regulation.

关 键 词：EKLF murine globin gene clusters chromatin-immunoprecipitation （CHIP） chromosome structure 

分 类 号：Q343[生物学—遗传学]