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Fig. 5 | Respiratory Research

Fig. 5

From: Combined genomic and proteomic approaches reveal DNA binding sites and interaction partners of TBX2 in the developing lung

Fig. 5

Scheme of the molecular interactions of TBX2 in repression of target genes in the pulmonary mesenchyme. Grey discs represent nucleosomes. DNA is displayed as black line. Dotted line indicates unknown length of DNA fragment and possible long distance. Circles for proteins do not represent the real size. TBX2 binds in concert with HMGB2 and PBX1 to specific DNA sites in enhancer regions. Binding to PBX1 is probably indirect via unknown proteins, binding to HMGB2 is direct and may aid in chromatin bending and bringing enhancer regions to the proximity of transcription start sites. TBX2/DNMT1 binding may induce DNA methylation to repress gene expression. TBX2 and CBX3 directly bind and both associate with the NuRD complex for chromatin remodeling. TBX2/MYBBP1 interaction may strengthen the association with the NuRD complex to repress target genes. TBX2 directly interacts with components of the NuRD complex, namely HDACs for chromatin deacetylation and the chromatin remodeling complex CHD4. TBX2 interaction with CBX3, HDACs and CHD4 collectively induces chromatin compaction. RBBP4/7 binds to chromatin to consolidate binding of the NuRD-complex to target gene DNA

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Respiratory Research

ISSN: 1465-993X

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