5eg0 | pdb_00005eg0

HOXB13-MEIS1 heterodimer bound to DNA

spinqualitylabelsall models 5eg0, resolution 3.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5eg0 is a 4 chain structure with sequence from Homo sapiens and Synthetic construct. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 3.101Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function HXB13_HUMAN Sequence-specific transcription factor which is part of a developmental regulatory system that provides cells with specific positional identities on the anterior-posterior axis. Publication Abstract from PubMed In the same way that the mRNA-binding specificities of transfer RNAs define the genetic code, the DNA-binding specificities of transcription factors (TFs) form the molecular basis of the gene regulatory code(1,2). The human gene regulatory code is much more complex than the genetic code, in particular because there are more than 1,600 TFs that commonly interact with each other. TF-TF interactions are required for specifying cell fate and executing cell-type-specific transcriptional programs. Despite this, the landscape of interactions between DNA-bound TFs is poorly defined. Here we map the biochemical interactions between DNA-bound TFs using CAP-SELEX, a method that can simultaneously identify individual TF binding preferences, TF-TF interactions and the DNA sequences that are bound by the interacting complexes. A screen of more than 58,000 TF-TF pairs identified 2,198 interacting TF pairs, 1,329 of which preferentially bound to their motifs arranged in a distinct spacing and/or orientation. We also discovered 1,131 TF-TF composite motifs that were markedly different from the motifs of the individual TFs. In total, we estimate that the screen identified between 18% and 47% of all human TF-TF motifs. The novel composite motifs we found were enriched in cell-type-specific elements, active in vivo and more likely to be formed between developmentally co-expressed TFs. Furthermore, TFs that define embryonic axes commonly interacted with different TFs and bound to distinct motifs, explaining how TFs with a similar specificity can define distinct cell types along developmental axes. DNA-guided transcription factor interactions extend human gene regulatory code.,Xie Z, Sokolov I, Osmala M, Yue X, Bower G, Pett JP, Chen Y, Wang K, Cavga AD, Popov A, Teichmann SA, Morgunova E, Kvon EZ, Yin Y, Taipale J Nature. 2025 Apr 9. doi: 10.1038/s41586-025-08844-z. PMID:40205063 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Hox protein

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