Post-Synaptic Scaffold at the Origin of the Animal Kingdom
Author Information
Author(s): Sakarya Onur, Armstrong Kathryn A., Adamska Maja, Adamski Marcin, Wang I-Fan, Tidor Bruce, Degnan Bernard M., Oakley Todd H., Kosik Kenneth S.
Primary Institution: University of California, Santa Barbara
Hypothesis
Did a complex protein scaffold exist at the origin of animals, predating nervous systems?
Conclusion
The study suggests that a complex protein scaffold was present at the origin of animals, indicating early evolutionary capabilities for synaptic structures.
Supporting Evidence
- The genome of the demosponge Amphimedon queenslandica contains a nearly complete set of post-synaptic protein homologs.
- Conserved interaction motifs in the dlg gene suggest an ancient origin for synaptic scaffolds.
- Expression of multiple post-synaptic gene homologs in sponge larval cells supports the existence of an assembled structure.
- Highly conserved protein interaction motifs indicate that the proto-post-synaptic scaffold predates the evolution of nervous systems.
Takeaway
Scientists found that sponges have proteins similar to those in animal brains, suggesting that the building blocks for nervous systems existed long before animals with brains appeared.
Methodology
The study involved genomic analysis of the demosponge Amphimedon queenslandica to identify post-synaptic protein homologs and their expression patterns.
Limitations
The study does not provide direct morphological evidence of synapses in sponges.
Digital Object Identifier (DOI)
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