A possible role of Drosophila CTCF in mitotic bookmarking and maintaining chromatin domains during the cell cycle

• Published in: Biological research Vol. 48; no. 1; pp. 27 - 8
• Main Authors: Shen, Wenlong, Wang, Dong, Ye, Bingyu, Shi, Minglei, Zhang, Yan, Zhao, Zhihu
• Format: Journal Article
• Language: English
• Published: England BioMed Central Ltd 27.05.2015; BioMed Central; Sociedad de Biología de Chile; BMC
• Subjects: Analysis; Animals; Base Sequence; Binding Sites; Bioinformatics; BIOLOGY; CCCTC-Binding Factor; Cell cycle; Cell Cycle - physiology; Chromatin - physiology; Chromatin Assembly and Disassembly - physiology; Chromatin domains; Computational Biology; Conserved Sequence; Datasets as Topic; dCTCF; Drosophila; Drosophila melanogaster - chemistry; Drosophila Proteins - physiology; Genome, Insect - genetics; Interphase - physiology; Mitosis - physiology; Mitotic bookmarking; Molecular Sequence Annotation; Repressor Proteins - physiology; Synteny; Zinc finger proteins; dCTCF; Bioinformatics; Chromatin domains; Mitotic bookmarking; Cell cycle
• ISSN: 0717-6287; 0716-9760; 0717-6287
• DOI: 10.1186/s40659-015-0019-6

The CCCTC-binding factor (CTCF) is a highly conserved insulator protein that plays various roles in many cellular processes. CTCF is one of the main architecture proteins in higher eukaryotes, and in combination with other architecture proteins and regulators, also shapes the three-dimensional organization of a genome. Experiments show CTCF partially remains associated with chromatin during mitosis. However, the role of CTCF in the maintenance and propagation of genome architectures throughout the cell cycle remains elusive. We performed a comprehensive bioinformatics analysis on public datasets of Drosophila CTCF (dCTCF). We characterized dCTCF-binding sites according to their occupancy status during the cell cycle, and identified three classes: interphase-mitosis-common (IM), interphase-only (IO) and mitosis-only (MO) sites. Integrated function analysis showed dCTCF-binding sites of different classes might be involved in different biological processes, and IM sites were more conserved and more intensely bound. dCTCF-binding sites of the same class preferentially localized closer to each other, and were highly enriched at chromatin syntenic and topologically associating domains boundaries. Our results revealed different functions of dCTCF during the cell cycle and suggested that dCTCF might contribute to the establishment of the three-dimensional architecture of the Drosophila genome by maintaining local chromatin compartments throughout the whole cell cycle.