Evolutionary Conservation of Apoptotic Pathway Components in Medaka Fish
Author Information
Author(s): Sakamaki Kazuhiro, Nozaki Masami, Kominami Katsuya, Satou Yutaka
Primary Institution: Kyoto University
Hypothesis
The core components necessary for the extrinsic apoptotic signaling pathway are conserved in Medaka fish.
Conclusion
The study shows that the core components necessary for the extrinsic apoptotic pathway are evolutionarily conserved in function and structure across vertebrate species.
Supporting Evidence
- Medaka Fas, caspase-8, and FADD showed protein structures similar to their mammalian counterparts.
- Functional analyses indicated that these molecules possess killing activity in mammalian cell lines.
- Genomic sequence analysis revealed that the Medaka fas, fadd, and caspase-8 genes are organized similarly to mammalian genes.
Takeaway
This study found that fish have similar proteins to those in humans that help cells die when they need to, showing that this process has been around for a long time.
Methodology
The researchers identified and characterized orthologs of mammalian Fas, FADD, and caspase-8 in Medaka fish and performed functional analyses in mammalian cell lines.
Digital Object Identifier (DOI)
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