Scientists Link 3D DNA Reshuffling to Cephalopod Intelligence Evolution
Updated
Updated · ScienceDaily · Oct 12
Scientists Link 3D DNA Reshuffling to Cephalopod Intelligence Evolution
1 articles · Updated · ScienceDaily · Oct 12
Summary
A study in Nature Communications found that an ancient genome reorganization in octopuses, squid and cuttlefish may have helped build the regulatory networks behind their unusually complex nervous systems.
Hundreds of millions of years ago, large DNA segments were rearranged, bringing previously distant genetic regions into contact and creating what researchers call regulatory entanglement without altering core gene sequences.
The team reconstructed 3D genome architecture across cephalopods and found broad chromatin domains stayed stable, while smaller chromatin loops varied by species, tissue and developmental stage.
Many of those flexible loops sat near genes tied to nervous-system development, suggesting DNA folding itself can shape evolutionary innovation rather than merely reflect it.
The researchers said the work does not prove these changes directly caused intelligence, but it offers a mechanism for how complex traits could evolve while preserving essential functions.