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DELAYED GREENING 409 encodes a dual-localized pentatricopeptide repeat protein required for chloroplast and mitochondrial development by Huiying Wang; Jing Liu; Wei Zhao; William Terzaghi; Linbin Deng; Hongfang Liu; Qiwei Zheng; Shihang Fan; Wei Hua; Ming Zheng is a Agricultural and Biological Sciences article available to read on EtoBox.

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Abstract In flowering plants, hundreds of RNA editing events occur in the chloroplasts and mitochondria during post-transcriptional processes. Although several pentatricopeptide repeat (PPR) proteins have been shown to form the editosome core, the precise interactions between the different editing factors are still obscure. Here, we isolated an Arabidopsis (Arabidopsis thaliana) PPR protein, designated DELAYED GREENING409 (DG409), that was dually targeted to chloroplasts and mitochondria. This protein consists of 409 amino acids with seven PPR motifs but lacks a C-terminal E, E + or DYW domain. A mild dg409 knockdown mutant displays a sickly phenotype. In this mutant, the young leaves are pale green and turn green at maturity, and the development of chloroplasts and mitochondria is severely disrupted. Complete loss of DG409 function results in defective embryos. Transcriptomic analysis of the dg409 knockdown plants showed some editing defects in genes from both organelles, including CASEINOLYTIC PROTEASE P (clpP)-559, RNA POLYMERASE SUBUNIT ALPHA (rpoA)-200, ACETYL-COA CARBOXYLASE CARBOXYL TRANSFERASE SUBUNIT BETA (accD)-1568, NADH DEHYDROGENASE SUBUNIT 7 (nad7)-1505 and RIBOSOMAL

Who reads DELAYED GREENING 409 encodes a dual-localized pentatricopeptide repeat protein required for chloroplast and mitochondrial development?

Author

Huiying Wang; Jing Liu; Wei Zhao; William Terzaghi; Linbin Deng; Hongfang Liu; Qiwei Zheng; Shihang Fan; Wei Hua; Ming Zheng

Publisher

Oxford University Press (OUP)

Published

2023

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)