Different Evolutionary Strategies for the Origin of Caspase-1 Inhibitors |
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Authors: | Júlia P. C. da Cunha Pedro A. F. Galante Sandro J. de Souza |
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Affiliation: | 1.Ludwig Institute for Cancer Research, S?o Paulo Branch,Sao Paulo,Brazil;2.Sao Paulo,Brazil |
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Abstract: | Caspase 1 (CASP-1) inhibitors share sequence similarity to CASP-1 itself and are all mapped to chr11q22.3. Here we show that these inhibitors are all products of a series of gene duplications that occurred at this locus after the divergence between human and mouse. Surprisingly, stop codons originated independently in all duplicated copies to generate CARD-only proteins with inhibitory activity. We discuss this evolutionary model in the context of both neo- and subfunctionalization. |
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Keywords: | Gene duplication Caspase-1 inhibitors |
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