Abstract
Analysis of the genome of the elephant shark (Callorhinchus milii), a member of the cartilaginous fishes (Class Chondrichthyes), reveals that it encodes all three members of the p53 gene family, p53, p63 and p73, each with clear homology to the equivalent gene in bony vertebrates (Class Osteichthyes). Thus, the gene duplication events that lead to the presence of three family members in the vertebrates dates to before the Silurian era. It also encodes Mdm2 and Mdm4 genes but does not encode the p19(Arf) gene. Detailed comparison of the amino acid sequences of these proteins in the vertebrates reveals that they are evolving at highly distinctive rates, and this variation occurs not only between the three family members but extends to distinct domains in each protein.
Publication types
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Comparative Study
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Research Support, Non-U.S. Gov't
MeSH terms
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Amino Acid Sequence
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Animals
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Base Sequence
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Conserved Sequence
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DNA, Complementary / genetics
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DNA-Binding Proteins / genetics
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Evolution, Molecular*
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Gene Components
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Molecular Sequence Data
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Multigene Family / genetics*
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Nuclear Proteins / genetics
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Proto-Oncogene Proteins c-mdm2 / genetics*
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Sequence Alignment
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Sequence Analysis, DNA
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Sequence Homology
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Sharks / genetics*
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Tumor Protein p73
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Tumor Suppressor Protein p53 / genetics*
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Tumor Suppressor Proteins / genetics
Substances
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DNA, Complementary
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DNA-Binding Proteins
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Nuclear Proteins
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Tumor Protein p73
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Tumor Suppressor Protein p53
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Tumor Suppressor Proteins
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Proto-Oncogene Proteins c-mdm2
Associated data
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GENBANK/JN794073
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GENBANK/JN794074
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GENBANK/JN794075
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GENBANK/JN794076
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GENBANK/JN794077
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GENBANK/JN794078