4HCA

DNA binding by GATA transcription factor-complex 1

Summary for 4HCA

• Entry DOI: 10.2210/pdb4hca/pdb
• Descriptor: Trans-acting T-cell-specific transcription factor GATA-3, DNA (5'-D(*AP*AP*TP*GP*TP*CP*CP*AP*TP*CP*TP*GP*AP*TP*AP*AP*GP*AP*CP*G)-3'), DNA (5'-D(*TP*TP*CP*GP*TP*CP*TP*TP*AP*TP*CP*AP*GP*AP*TP*GP*GP*AP*CP*A)-3'), ... (4 entities in total)
• Functional Keywords: zinc finger, gata transcription factor, dna bridging, transcription-dna complex, transcription/dna
• Biological source: Homo sapiens (human); More
• Cellular location: Nucleus: P23771
• Total number of polymer chains: 3
• Total formula weight: 25290.67

Authors

Chen, Y.,Bates, D.L.,Dey, R.,Chen, L. (deposition date: 2012-09-28, release date: 2012-12-05, Last modification date: 2024-02-28)

Primary citation

Chen, Y.,Bates, D.L.,Dey, R.,Chen, P.H.,Machado, A.C.,Laird-Offringa, I.A.,Rohs, R.,Chen, L.
DNA Binding by GATA Transcription Factor Suggests Mechanisms of DNA Looping and Long-Range Gene Regulation.
Cell Rep, 2:1197-1206, 2012

PubMed Abstract: 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.

PubMed: 23142663
DOI: 10.1016/j.celrep.2012.10.012

Experimental method

X-RAY DIFFRACTION (2.8 Å)