4cz6

Truncated tetramerization domain of zebrafish p53 (crystal form II)

spinqualitylabelsall models 4cz6, resolution 1.53Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4cz6 is a 4 chain structure with sequence from Brachidanio rerio. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: PEG Related: 4cz5, 4cz7 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [P53_DANRE] Acts as a tumor suppressor in many tumor types; induces growth arrest or apoptosis depending on the physiological circumstances and cell type. Involved in cell cycle regulation as a trans-activator that acts to negatively regulate cell division by controlling a set of genes required for this process. One of the activated genes is an inhibitor of cyclin-dependent kinases. Apoptosis induction seems to be mediated either by stimulation of bax and fas antigen expression, or by repression of Bcl-2 expression. Publication Abstract from PubMed The tetrameric transcription factors p53, p63, and p73 evolved from a common ancestor and play key roles in tumor suppression and development. Surprisingly, p63 and p73 require a second helix in their tetramerization domain for the formation of stable tetramers that is absent in human p53, raising questions about the evolutionary processes leading to diversification. Here we determined the crystal structure of the zebrafish p53 tetramerization domain, which contains a second helix, reminiscent of p63 and p73, combined with p53-like features. Through comprehensive phylogenetic analyses, we systematically traced the evolution of vertebrate p53 family oligomerization domains back to the beginning of multicellular life. We provide evidence that their last common ancestor also had an extended p63/p73-like domain and pinpoint evolutionary events that shaped this domain during vertebrate radiation. Domain compaction and transformation of a structured into a flexible, intrinsically disordered region may have contributed to the expansion of the human p53 interactome. Tracing the Evolution of the p53 Tetramerization Domain.,Joerger AC, Wilcken R, Andreeva A Structure. 2014 Sep 2;22(9):1301-10. doi: 10.1016/j.str.2014.07.010. PMID:25185827 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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