Structures of SAP-1 bound to DNA targets from the E74 and c-fos promoters: insights into DNA sequence discrimination by Ets proteins.Mo, Y., Vaessen, B., Johnston, K., Marmorstein, R.
(1998) Mol Cell 2: 201-212
- PubMed: 9734357
- DOI: https://doi.org/10.1016/s1097-2765(00)80130-6
- Primary Citation of Related Structures:
- PubMed Abstract:
SAP-1 is a member of the Ets transcription factors and cooperates with SRF protein to activate transcription of the c-fos protooncogene. The crystal structures of the conserved ETS domain of SAP-1 bound to DNA sequences from the E74 and c-fos promoters reveal that a set of conserved residues contact a GGA core DNA sequence. Discrimination for sequences outside this core is mediated by DNA contacts from conserved and nonconserved protein residues and sequence-dependent DNA structural properties characteristic of A-form DNA structure. Comparison with the related PU.1/DNA and GABPalpha/beta/DNA complexes provides general insights into DNA discrimination between Ets proteins. Modeling studies of a SAP-1/SRF/DNA complex suggest that SRF may modulate SAP-1 binding to DNA by interacting with its ETS domain.
The Wistar Institute, Department of Chemistry, University of Pennsylvania, Philadelphia 19104, USA.