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• W1968092675 abstract "MDM2 and MDM4 are proto-oncoproteins that bind to and inhibit members of the p53 protein family, p53, p73 and possibly p63. p53 is a mammalian tumor suppressor and p63 and p73 are critical for development. With the sequencing of genomes from multiple organisms there is mounting evidence for a consensus scenario of p53 gene family evolution. A single p53/p63/p73 gene is in invertebrates and required for maintenance of germline DNA. Gene duplication occurred in an ancestor in common with cartilaginous fishes, giving rise to a separate p53 gene and at least one ancestral p63/p73 gene. In bony vertebrates, all three p53 gene family paralogs, p53, p63, and p73 are distinct genes. This raises the question of how MDM2 and MDM4 genes evolved. We show evidence that MDM2 and MDM4 arose from a gene duplication event prior to the emergence of bony vertebrates more than 440 millionyears ago. Comparative genome studies indicate that invertebrate organisms have only one MDM homolog. In jawed vertebrates, the p53-binding domains of MDM2 and MDM4 proteins evolved at a high rate, approaching the evolution rate of the MDM2-binding domain of p53. However, the MDM2-binding domain of p73 exhibits markedly stronger conservation suggesting novel p53-independent functions. The most conserved domain within all MDM2 family members is the RING domain of the MDM2 ortholog which is responsible for ubiquitination of p53 and heterodimerization with MDM4. We suggest a model where oligomerization is an ancient function of MDM and ubiquitination activity was acquired later near the MDM gene duplication event coinciding with the time of the emergence of p53 as a distinct gene." @default.
• W1968092675 created "2016-06-24" @default.
• W1968092675 creator A5006068219 @default.
• W1968092675 creator A5028112007 @default.
• W1968092675 creator A5088016107 @default.
• W1968092675 date "2011-10-01" @default.
• W1968092675 modified "2023-10-16" @default.
• W1968092675 title "The evolution of MDM2 family genes" @default.
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• W1968092675 doi "https://doi.org/10.1016/j.gene.2011.06.030" @default.
• W1968092675 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3162079" @default.
• W1968092675 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21762762" @default.
• W1968092675 hasPublicationYear "2011" @default.
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