Identification of the DNA binding element of the human ZNF300 protein

Cellular & Molecular Biology Letters

Huanjie Shao¹  Lu Xue¹  Li Gao¹  Wenxin Li¹  Hongling Qiu¹  Mingxiong Guo¹  Di Wang¹ 

[1] State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, P.R. China$$

关键词: ZNF300;    Zinc finger;    DNA binding;   

DOI  :  10.2478/s11658-008-0005-x

学科分类：分子生物学，细胞生物学和基因

来源: Uniwersytet Wroclawski * Wydzial Biotechnologii / University of Wroclaw, Faculty of Biotechnology

【 摘 要 】

The human ZNF300 gene is a member of the KRAB/C2H2 zinc finger gene family, the members of which are known to be involved in various developmental and pathological processes. Here, we show that the ZNF300 gene encodes a 68-kDa nuclear protein that binds DNA in a sequence-specific manner. The ZNF300 DNA binding site, C(t/a)GGGGG(c/g)G, was defined via a random oligonucleotide selection assay, and the DNA binding site was further confirmed by electrophoretic mobility shift assays. A potential ZNF300 binding site was found in the promoter region of the human IL-2Rβ gene. The results of electrophoretic mobility shift assays indicated that ZNF300 bound to the ZNF300 binding site in the IL-2Rβ promoter in vitro. Transient co-transfection assays showed that ZNF300 could activate the IL-2Rβ promoter, and that the activation was abrogated by the mutation of residues in the ZNF300 binding site. Identifying the DNA binding site and characterizing the transcriptional regulation property of ZNF300 would provide critical insights into its potential as a transcriptional regulator.

【 授权许可】

Unknown