Protein:protein interactions and the pairing of boundary elements in vivo

Jason Blanton, Miklos Gaszner, Paul Schedl

Research output: Contribution to journalArticlepeer-review

157 Scopus citations


Although it is now well-established that boundary elements/insulators function to subdivide eukaryotic chromosomes into autonomous regulatory domains, the underlying mechanisms remain elusive. One idea is that boundaries act as barriers, preventing the processive spreading of "active" or "silenced" chromatin between domains. Another is that the partitioning into autonomous functional units is a consequence of an underlying structural subdivision of the chromosome into higher order "looped" domains. In this view, boundaries are thought to delimit structural domains by interacting with each other or with some other nuclear structure. The studies reported here provide support for the looped domain model. We show that the Drosophila scs and scs' boundary proteins, Zw5 and BEAF, respectively, interact with each other in vitro and in vivo. Moreover, consistent with idea that this protein:protein interaction might facilitate pairing of boundary elements, we find that that scs and scs' are in close proximity to each other in Drosophila nuclei.

Original languageEnglish (US)
Pages (from-to)664-675
Number of pages12
JournalGenes and Development
Issue number5
StatePublished - Mar 1 2003

All Science Journal Classification (ASJC) codes

  • General Medicine


  • Boundaries
  • Domains
  • Insulators
  • Looping
  • Pairing
  • Protein:protein interaction


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