Summary information and primary citation
- PDB-id
- 5wx9; DSSR-derived features in text and JSON formats
- Class
- DNA binding protein-DNA
- Method
- X-ray (1.76 Å)
- Summary
- Crystal structure of aterf96 with gcc-box
- Reference
- Chen CY, Lin PH, Chen KH, Cheng YS (2020): "Structural insights into Arabidopsis ethylene response factor 96 with an extended N-terminal binding to GCC box." Plant Mol.Biol., 104, 483-498. doi: 10.1007/s11103-020-01052-5.
- Abstract
- The phytohormone ethylene is widely involved in many developmental processes and is a crucial regulator of defense responses against biotic and abiotic stresses in plants. Ethylene-responsive element binding protein, a member of the APETALA2/ethylene response factor (AP2/ERF) superfamily, is a transcription factor that regulates stress-responsive genes by recognizing a specific cis-acting element of target DNA. A previous study showed only the NMR structure of the AP2/ERF domain of AtERF100 in complex with a GCC box DNA motif. In this report, we determined the crystal structure of AtERF96 in complex with a GCC box at atomic resolution. We analyzed the binding residues of the conserved AP2/ERF domain in the DNA recognition sequence. In addition to the AP2/ERF domain, an N-terminal α-helix of AtERF96 participates in DNA interaction in the flanking region. We also demonstrated the structure of AtERF96 EDLL motif, a unique conserved motif in the group IX of AP2/ERF family, might involve in the transactivation of defense-related genes. Our study establishes the structural basis of the AtERF96 transcription factor in complex with the GCC box, as well as the DNA binding mechanisms of the N-terminal α-helix and AP2/ERF domain.
