Download MendeleyStructure of NF-kappaB p50/p65 heterodimer bound to the PRDII DNA element from the interferon-beta promoter
Escalante, C.R., Shen, L., Thanos, D., Aggarwal, A.K.(2002) Structure 10: 383-391
- PubMed: 12005436
- DOI: https://doi.org/10.1016/s0969-2126(02)00723-2
- Primary Citation of Related Structures:
2I9T - PubMed Abstract:
Upon viral infection, NF-kappaB translocates to the nucleus and activates the IFN-beta gene by binding to the PRDII element. Strikingly, NF-kappaB loses its ability to activate the IFN-beta gene when the PRDII element is substituted by closely related sites. We report here the crystal structure of NF-kappaB p50/p65 heterodimer bound to the PRDII element from the IFN-beta promoter. The structure reveals an unexpected alteration in configuration, in which the p50 specificity domain moves by as much as approximately 9 A when compared to NF-kappaB heterodimer bound to the immunoglobulin kappaB site (Ig-kappaB) while maintaining the same base-specific contacts with the DNA. Taken together, the structure offers new insights into the allosteric effects of closely related DNA sites on the configuration of NF-kappaB and its transcriptional selectivity.
Organizational Affiliation:
Structural Biology Program, Department of Physiology and Biophysics, Mount Sinai School of Medicine, New York, New York 10029, USA.
