RNA Editing Underlies Temperature Adaptation in K+ Channels from Polar Octopuses
To operate in the extreme cold, ion channels from psychrophiles must have evolved structural changes to compensate for their thermal environment. A reasonable assumption would be that the underlying adaptations lie within the encoding genes. Here we show that delayed rectifier K+ channel genes from...
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ftpubmed:oai:pubmedcentral.nih.gov:4219319 2023-05-15T13:36:34+02:00 RNA Editing Underlies Temperature Adaptation in K+ Channels from Polar Octopuses Garrett, Sandra Rosenthal, Joshua J.C. 2012-01-05 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4219319 http://www.ncbi.nlm.nih.gov/pubmed/22223739 https://doi.org/10.1126/science.1212795 en eng http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://www.ncbi.nlm.nih.gov/pubmed/22223739 http://dx.doi.org/10.1126/science.1212795 Article Text 2012 ftpubmed https://doi.org/10.1126/science.1212795 2014-11-09T01:28:13Z To operate in the extreme cold, ion channels from psychrophiles must have evolved structural changes to compensate for their thermal environment. A reasonable assumption would be that the underlying adaptations lie within the encoding genes. Here we show that delayed rectifier K+ channel genes from an Antarctic and a tropical octopus encode channels that differ at only four positions and display very similar behavior when expressed in Xenopus oocytes. However, the transcribed mRNAs are extensively edited, creating functional diversity. One editing site, which recodes an isoleucine to a valine in the channel’s pore, greatly accelerates gating kinetics by destabilizing the open state. This site is extensively edited in both Antarctic and Arctic species, but mostly unedited in tropical species. Thus A-to-I RNA editing can respond to the physical environment. Text Antarc* Antarctic Arctic PubMed Central (PMC) Antarctic Arctic Science 335 6070 848 851 |
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Article Garrett, Sandra Rosenthal, Joshua J.C. RNA Editing Underlies Temperature Adaptation in K+ Channels from Polar Octopuses |
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Article |
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To operate in the extreme cold, ion channels from psychrophiles must have evolved structural changes to compensate for their thermal environment. A reasonable assumption would be that the underlying adaptations lie within the encoding genes. Here we show that delayed rectifier K+ channel genes from an Antarctic and a tropical octopus encode channels that differ at only four positions and display very similar behavior when expressed in Xenopus oocytes. However, the transcribed mRNAs are extensively edited, creating functional diversity. One editing site, which recodes an isoleucine to a valine in the channel’s pore, greatly accelerates gating kinetics by destabilizing the open state. This site is extensively edited in both Antarctic and Arctic species, but mostly unedited in tropical species. Thus A-to-I RNA editing can respond to the physical environment. |
format |
Text |
author |
Garrett, Sandra Rosenthal, Joshua J.C. |
author_facet |
Garrett, Sandra Rosenthal, Joshua J.C. |
author_sort |
Garrett, Sandra |
title |
RNA Editing Underlies Temperature Adaptation in K+ Channels from Polar Octopuses |
title_short |
RNA Editing Underlies Temperature Adaptation in K+ Channels from Polar Octopuses |
title_full |
RNA Editing Underlies Temperature Adaptation in K+ Channels from Polar Octopuses |
title_fullStr |
RNA Editing Underlies Temperature Adaptation in K+ Channels from Polar Octopuses |
title_full_unstemmed |
RNA Editing Underlies Temperature Adaptation in K+ Channels from Polar Octopuses |
title_sort |
rna editing underlies temperature adaptation in k+ channels from polar octopuses |
publishDate |
2012 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4219319 http://www.ncbi.nlm.nih.gov/pubmed/22223739 https://doi.org/10.1126/science.1212795 |
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Antarctic Arctic |
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Antarctic Arctic |
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Antarc* Antarctic Arctic |
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Antarc* Antarctic Arctic |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://www.ncbi.nlm.nih.gov/pubmed/22223739 http://dx.doi.org/10.1126/science.1212795 |
op_doi |
https://doi.org/10.1126/science.1212795 |
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Science |
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335 |
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6070 |
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1766080716493291520 |