Structures of heterodimeric POZ domains of Miz1/BCL6 and Miz1/NAC1.Stead, M.A., Wright, S.C.
(2014) Acta Crystallogr F Struct Biol Commun 70: 1591-1596
- PubMed: 25484205
- DOI: https://doi.org/10.1107/S2053230X14023449
- Primary Citation of Related Structures:
- PubMed Abstract:
The POZ domain is an evolutionarily conserved protein-protein interaction domain that is found in approximately 40 mammalian transcription factors. POZ domains mediate both homodimerization and the heteromeric interactions of different POZ-domain transcription factors with each other. Miz1 is a POZ-domain transcription factor that regulates cell-cycle arrest and DNA-damage responses. The activities of Miz1 are altered by its interaction with the POZ-domain transcriptional repressors BCL6 and NAC1, and these interactions have been implicated in tumourigenesis in B-cell lymphomas and in ovarian serous carcinomas that overexpress BCL6 and NAC1, respectively. A strategy for the purification of tethered POZ domains that form forced heterodimers is described, and crystal structures of the heterodimeric POZ domains of Miz1/BCL6 and of Miz1/NAC1 are reported. These structures will be relevant for the design of therapeutics that target POZ-domain interaction interfaces.
School of Biology, University of Leeds, Leeds LS2 9JT, England.