Download MendeleyRegulation of the transcription factor Ets-1 by DNA-mediated homo-dimerization.
Lamber, E.P., Vanhille, L., Textor, L.C., Kachalova, G.S., Sieweke, M.H., Wilmanns, M.(2008) EMBO J 27: 2006-2017
- PubMed: 18566588
- DOI: https://doi.org/10.1038/emboj.2008.117
- Primary Citation of Related Structures:
2NNY - PubMed Abstract:
The function of the Ets-1 transcription factor is regulated by two regions that flank its DNA-binding domain. A previously established mechanism for auto-inhibition of monomeric Ets-1 on DNA response elements with a single ETS-binding site, however, has not been observed for the stromelysin-1 promoter containing two palindromic ETS-binding sites. We present the structure of Ets-1 on this promoter element, revealing a ternary complex in which protein homo-dimerization is mediated by the specific arrangement of the two ETS-binding sites. In this complex, the N-terminal-flanking region is required for ternary protein-DNA assembly. Ets-1 variants, in which residues from this region are mutated, loose the ability for DNA-mediated dimerization and stromelysin-1 promoter transactivation. Thus, our data unravel the molecular basis for relief of auto-inhibition and the ability of Ets-1 to function as a facultative dimeric transcription factor on this site. Our findings may also explain previous data of Ets-1 function in the context of heterologous transcription factors, thus providing a molecular model that could also be valid for Ets-1 regulation by hetero-oligomeric assembly.
Organizational Affiliation:
EMBL-Hamburg, c/o DESY, Hamburg, Germany.
