Factors that determine cell type-specific CTCF binding in health and disease.

A number of factors contribute to cell type-specific CTCF chromatin binding, but how they act in concert to determine binding stability and functionality has not been fully elucidated. In this review, we tie together different layers of regulation to provide a holistic view of what is known. What emerges from these studies is a multifaceted system in which DNA sequence, DNA and chromatin accessibility, and cell type-specific transcription factors together contribute to CTCF binding profile and function. We discuss these findings in the light of disease settings in which changes in the chromatin landscape and transcriptional programming can disrupt CTCF's binding profile and involvement in looping.