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Activity-regulated RNA editing in select neuronal subfields in hippocampus

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posted on 2023-06-08, 22:41 authored by Ales Balik, Andrew PennAndrew Penn, Zsofia Nemoda, Ingo H Greger
RNA editing by adensosine deaminases is a widespread mechanism to alter genetic information in metazoa. In addition to modifications in non-coding regions, editing contributes to diversification of protein function, in analogy to alternative splicing. However, although splicing programs respond to external signals, facilitating fine tuning and homeostasis of cellular functions, a similar regulation has not been described for RNA editing. Here, we show that the AMPA receptor R/G editing site is dynamically regulated in the hippocampus in response to activity. These changes are bi-directional, reversible and correlate with levels of the editase Adar2. This regulation is observed in the CA1 hippocampal subfield but not in CA3 and is thus subfield/celltype-specific. Moreover, alternative splicing of the flip/flop cassette downstream of the R/G site is closely linked to the editing state, which is regulated by Ca(2+). Our data show that A-to-I RNA editing has the capacity to tune protein function in response to external stimuli.

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Publication status

  • Published

File Version

  • Published version

Journal

Nucleic Acids Research

ISSN

0305-1048

Publisher

Oxford University Press

Issue

2

Volume

41

Page range

1124-1134

Department affiliated with

  • Neuroscience Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2015-10-07

First Open Access (FOA) Date

2015-10-07

First Compliant Deposit (FCD) Date

2015-10-06

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