2LEX image
Deposition Date 2011-06-24
Release Date 2012-01-18
Last Version Date 2024-05-01
Entry Detail
PDB ID:
2LEX
Title:
Complex of the C-terminal WRKY domain of AtWRKY4 and a W-box DNA
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Conformers Calculated:
100
Conformers Submitted:
20
Selection Criteria:
structures with the least restraint violations
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Probable WRKY transcription factor 4
Gene (Uniprot):WRKY4
Chain IDs:A
Chain Length:78
Number of Molecules:1
Biological Source:Arabidopsis thaliana
Ligand Molecules
Primary Citation
Structural basis for sequence-spscific DNA recognition by an Arabidopsis WRKY transcription factor
J.Biol.Chem. ? ? ? (2012)
PMID: 22219184 DOI: 10.1074/jbc.M111.279844

Abstact

The WRKY family transcription factors regulate plant-specific reactions that are mostly related to biotic and abiotic stresses. They share the WRKY domain, which recognizes a DNA element (TTGAC(C/T)) termed the W-box, in target genes. Here, we determined the solution structure of the C-terminal WRKY domain of Arabidopsis WRKY4 in complex with the W-box DNA by NMR. A four-stranded β-sheet enters the major groove of DNA in an atypical mode termed the β-wedge, where the sheet is nearly perpendicular to the DNA helical axis. Residues in the conserved WRKYGQK motif contact DNA bases mainly through extensive apolar contacts with thymine methyl groups. The importance of these contacts was verified by substituting the relevant T bases with U and by surface plasmon resonance analyses of DNA binding.

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Primary Citation of related structures