4HC7 image
Entry Detail
PDB ID:
4HC7
Title:
Crystal structure of the full DNA binding domain of GATA3-complex 2
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2012-09-28
Release Date:
2012-12-05
Method Details:
Experimental Method:
Resolution:
2.65 Å
R-Value Free:
0.26
R-Value Work:
0.22
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Trans-acting T-cell-specific transcription factor GATA-3
Chain IDs:A, D (auth: B)
Chain Length:115
Number of Molecules:2
Biological Source:Homo sapiens
Polymer Type:polydeoxyribonucleotide
Description:DNA (5'-D(*TP*TP*CP*CP*TP*AP*AP*AP*TP*CP*AP*GP*AP*GP*AP*TP*AP*AP*CP*C)-3')
Chain IDs:B (auth: W), E (auth: Y)
Chain Length:20
Number of Molecules:2
Biological Source:
Polymer Type:polydeoxyribonucleotide
Description:DNA (5'-D(*AP*AP*GP*GP*TP*TP*AP*TP*CP*TP*CP*TP*GP*AP*TP*TP*TP*AP*GP*G)-3')
Chain IDs:C (auth: X), F (auth: Z)
Chain Length:20
Number of Molecules:2
Biological Source:
Ligand Molecules
Primary Citation
DNA Binding by GATA Transcription Factor Suggests Mechanisms of DNA Looping and Long-Range Gene Regulation.
Cell Rep 2 1197 1206 (2012)
PMID: 23142663 DOI: 10.1016/j.celrep.2012.10.012

Abstact

GATA transcription factors regulate transcription during development and differentiation by recognizing distinct GATA sites with a tandem of two conserved zinc fingers, and by mediating long-range DNA looping. However, the molecular basis of these processes is not well understood. Here, we determined three crystal structures of the full DNA-binding domain (DBD) of human GATA3 protein, which contains both zinc fingers, in complex with different DNA sites. In one structure, both zinc fingers wrap around a palindromic GATA site, cooperatively enhancing the binding affinity and kinetic stability. Strikingly, in the other two structures, the two fingers of GATA DBD bind GATA sites on different DNA molecules, thereby bridging two separate DNA fragments. This was confirmed in solution by an in-gel fluorescence resonance energy transfer analysis. These findings not only provide insights into the structure and function of GATA proteins but also shed light on the molecular basis of long-range gene regulation.

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Primary Citation of related structures