@article{203946,
  keywords = {Animals, Gene Deletion, Drosophila melanogaster, Drosophila Proteins, Genes, Insect, Polycomb-Group Proteins, Genes, Homeobox, Insulator Elements, Response Elements},
  author = {Nikolay Postika and Paul Schedl and Pavel Georgiev and Olga Kyrchanova},
  title = {Mapping of functional elements of the Fab-6 boundary involved in the regulation of the Abd-B hox gene in Drosophila melanogaster},
  abstract = { The autonomy of segment-specific regulatory domains in the Bithorax complex is conferred by boundary elements and associated Polycomb response elements (PREs). The Fab-6 boundary is located at the junction of the iab-5 and iab-6 domains. Previous studies mapped it to a nuclease hypersensitive region 1 (HS1), while the iab-6 PRE was mapped to a second hypersensitive region HS2 nearly 3~kb away. To analyze the role of HS1 and HS2 in boundary we generated deletions of HS1 or HS1 + HS2 that have attP site for boundary replacement experiments. The 1389~bp HS1 deletion can be rescued by a 529~bp core Fab-6 sequence that includes two CTCF sites. However, Fab-6 HS1 cannot rescue the HS1 + HS2 deletion or substitute for another BX-C boundary - Fab-7. For this it must be combined with a PRE, either Fab-7 HS3, or Fab-6 HS2. These findings suggest that the boundary function of Fab-6 HS1 must be bolstered by a second element that has PRE activity. },
  year = {2021},
  journal = {Sci Rep},
  volume = {11},
  pages = {4156},
  month = {02/2021},
  issn = {2045-2322},
  doi = {10.1038/s41598-021-83734-8},
  language = {eng},
}