title: The AT-rich DNA-binding protein SATB2 promotes expression and physical association of human (G)γ- and (A)γ-globin genes.
abstract: Matrix attachment region (MAR)-binding protein (MARBP) has profound influence on gene transcriptional control by tethering genes to the nuclear scaffold. MARBP SATB2 is recently known as a versatile regulator functioning in the differentiation of multiple cell types including embryonic stem cells, osteoblasts and immunocytes. Roles of SATB2 in erythroid cells and its working mechanism in orchestrating target gene expression are largely unexplored. We show here that SATB2 is expressed in erythroid cells and activates γ-globin genes by binding to MARs in their promoters and recruiting histone acetylase PCAF. Further analysis in higher-order chromatin structure shows that SATB2 affects physical proximity of human (G)γ- and (A)γ-globin promoters via self-association. We also found that SATB2 interacts with SATB1, which specifically activates ε-globin gene expression. Our results establish SATB2 as a novel γ-globin gene regulator and provide a glimpse of the differential and cooperative roles of SATB family proteins in modulating clustered genes transcription and mediating higher-order chromatin structures.
authors: National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100005, PR China.
authors: Li-Quan
authors: LQ
authors: Zhou
authors: Jie
authors: J
authors: Wu
authors: Wen-Tian
authors: WT
authors: Wang
authors: Wei
authors: W
authors: Yu
authors: Guang-Nian
authors: GN
authors: Zhao
authors: Peng
authors: P
authors: Zhang
authors: Jian
authors: J
authors: Xiong
authors: Man
authors: M
authors: Li
authors: Zheng
authors: Z
authors: Xue
authors: Xing
authors: X
authors: Wang
authors: Xue-Min
authors: XM
authors: Xie
authors: Zhi-Chen
authors: ZC
authors: Guo
authors: Xiang
authors: X
authors: Lv
authors: De-Pei
authors: DP
authors: Liu
mesh_terms: D000818:Animals; D053595:Embryonic Stem Cells / Q000166:cytology / Q000378:metabolism; D041905:Erythroid Cells / Q000166:cytology / Q000378:metabolism*; D005786:Gene Expression Regulation / Q000502:physiology*; D006801:Humans; D020014:K562 Cells; D036961:Matrix Attachment Region Binding Proteins / Q000235:genetics / Q000378:metabolism*; D045170:Matrix Attachment Regions / Q000502:physiology*; D051379:Mice; D005810:Multigene Family / Q000502:physiology*; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*; D014158:Transcription, Genetic / Q000502:physiology; D055545:gamma-Globins / Q000096:biosynthesis* / Q000235:genetics
chemical_list: D036961:Matrix Attachment Region Binding Proteins; C076189:SATB1 protein, human; C521297:SATB2 protein, human; C501473:SATB2 protein, mouse; C469541:Satb1 protein, mouse; D014157:Transcription Factors; D055545:gamma-Globins