8OSB image
Deposition Date 2023-04-18
Release Date 2024-01-31
Last Version Date 2024-02-14
Entry Detail
PDB ID:
8OSB
Keywords:
Title:
TWIST1-TCF4-ALX4 complex on specific DNA
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.90 Å
R-Value Free:
0.26
R-Value Work:
0.21
R-Value Observed:
0.22
Space Group:
P 31 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Transcription factor 4
Gene (Uniprot):TCF4
Chain IDs:D (auth: A)
Chain Length:60
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:Twist-related protein 1
Gene (Uniprot):TWIST1
Chain IDs:E (auth: B)
Chain Length:67
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:Homeobox protein aristaless-like 4
Gene (Uniprot):ALX4
Chain IDs:C (auth: E)
Chain Length:62
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (25-MER)
Chain IDs:B (auth: W)
Chain Length:25
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (25-MER)
Chain IDs:A (auth: X)
Chain Length:25
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation
DNA-guided transcription factor cooperativity shapes face and limb mesenchyme.
Cell 187 692 ? (2024)
PMID: 38262408 DOI: 10.1016/j.cell.2023.12.032

Abstact

Transcription factors (TFs) can define distinct cellular identities despite nearly identical DNA-binding specificities. One mechanism for achieving regulatory specificity is DNA-guided TF cooperativity. Although in vitro studies suggest that it may be common, examples of such cooperativity remain scarce in cellular contexts. Here, we demonstrate how "Coordinator," a long DNA motif composed of common motifs bound by many basic helix-loop-helix (bHLH) and homeodomain (HD) TFs, uniquely defines the regulatory regions of embryonic face and limb mesenchyme. Coordinator guides cooperative and selective binding between the bHLH family mesenchymal regulator TWIST1 and a collective of HD factors associated with regional identities in the face and limb. TWIST1 is required for HD binding and open chromatin at Coordinator sites, whereas HD factors stabilize TWIST1 occupancy at Coordinator and titrate it away from HD-independent sites. This cooperativity results in the shared regulation of genes involved in cell-type and positional identities and ultimately shapes facial morphology and evolution.

Legend

Protein

Chemical

Disease

Primary Citation of related structures