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Publication Abstract from PubMed

In poikilotherms, temperature changes challenge the integration of physiological function. Within the complex nervous systems of the behaviorally sophisticated coleoid cephalopods, these problems are substantial. RNA editing by adenosine deamination is a well-positioned mechanism for environmental acclimation. We report that the neural proteome of Octopus bimaculoides undergoes massive reconfigurations via RNA editing following a temperature challenge. Over 13,000 codons are affected, and many alter proteins that are vital for neural processes. For two highly temperature-sensitive examples, recoding tunes protein function. For synaptotagmin, a key component of Ca(2+)-dependent neurotransmitter release, crystal structures and supporting experiments show that editing alters Ca(2+) binding. For kinesin-1, a motor protein driving axonal transport, editing regulates transport velocity down microtubules. Seasonal sampling of wild-caught specimens indicates that temperature-dependent editing occurs in the field as well. These data show that A-to-I editing tunes neurophysiological function in response to temperature in octopus and most likely other coleoids.

Temperature-dependent RNA editing in octopus extensively recodes the neural proteome.,Birk MA, Liscovitch-Brauer N, Dominguez MJ, McNeme S, Yue Y, Hoff JD, Twersky I, Verhey KJ, Sutton RB, Eisenberg E, Rosenthal JJC Cell. 2023 Jun 8;186(12):2544-2555.e13. doi: 10.1016/j.cell.2023.05.004. Epub , 2023 Jun 8. PMID:37295402^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.