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- W2936705130 abstract "During development or under stress, chloroplasts generate signals that regulate the expression of a large number of nuclear genes, a process called retrograde signaling. GENOMES UNCOUPLED 1 (GUN1) is an important regulator of this pathway. In this study, we have discovered an unexpected role for GUN1 in plastid RNA editing, as gun1 mutations affect RNA-editing efficiency at multiple sites in plastids during retrograde signaling. GUN1 plays a direct role in RNA editing by physically interacting with MULTIPLE ORGANELLAR RNA EDITING FACTOR 2 (MORF2). MORF2 overexpression causes widespread RNA-editing changes and a strong genomes uncoupled ( gun ) molecular phenotype similar to gun1 . MORF2 further interacts with RNA-editing site-specificity factors: ORGANELLE TRANSCRIPT PROCESSING 81 (OTP81), ORGANELLE TRANSCRIPT PROCESSING 84 (OTP84), and YELLOW SEEDLINGS 1 (YS1). We further show that otp81 , otp84 , and ys1 single mutants each exhibit a very weak gun phenotype, but combining the three mutations enhances the phenotype. Our study uncovers a role for GUN1 in the regulation of RNA-editing efficiency in damaged chloroplasts and suggests that MORF2 is involved in retrograde signaling." @default.
- W2936705130 created "2019-04-25" @default.
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- W2936705130 date "2019-04-15" @default.
- W2936705130 modified "2023-10-16" @default.
- W2936705130 title "GUN1 interacts with MORF2 to regulate plastid RNA editing during retrograde signaling" @default.
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- W2936705130 doi "https://doi.org/10.1073/pnas.1820426116" @default.
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