Sequential binding of MEIS1 and NKX2-5 on the Popdc2 gene: a mechanism for spatiotemporal regulation of enhancers during cardiogenesis Laurent Dupays Catherine Shang Robert Wilson Surendra Kotecha Sophie Wood Norma Towers Timothy Mohun 10779/crick.12681794.v1 https://crick.figshare.com/articles/journal_contribution/Sequential_binding_of_MEIS1_and_NKX2-5_on_the_Popdc2_gene_a_mechanism_for_spatiotemporal_regulation_of_enhancers_during_cardiogenesis/12681794 The homeobox transcription factors NKX2-5 and MEIS1 are essential for vertebrate heart development and normal physiology of the adult heart. We show that, during cardiac differentiation, the two transcription factors have partially overlapping expression patterns, with the result that as cardiac progenitors from the anterior heart field differentiate and migrate into the cardiac outflow tract, they sequentially experience high levels of MEIS1 and then increasing levels of NKX2-5. Using the Popdc2 gene as an example, we also show that a significant proportion of target genes for NKX2-5 contain a binding motif recognized by NKX2-5, which overlaps with a binding site for MEIS1. Binding of the two factors to such overlapping sites is mutually exclusive, and this provides a simple regulatory mechanism for spatial and temporal synchronization of a common pool of targets between NKX2-5 and MEIS1. 2020-07-21 10:19:50 Animals Binding Sites Cell Adhesion Molecules Embryo, Mammalian Enhancer Elements, Genetic Gene Expression Profiling Gene Expression Regulation, Developmental Homeobox Protein Nkx-2.5 Homeodomain Proteins Mice Mice, Transgenic Molecular Sequence Data Muscle Proteins Myeloid Ecotropic Viral Integration Site 1 Protein Myocardium Neoplasm Proteins Nucleotide Motifs Organogenesis Protein Binding Signal Transduction Transcription Factors Troponin Troponin I Mohun U117562103 BRF AS-ack 0601 Biochemistry and Cell Biology