The pentatricopeptide repeat protein EMP601 functions in maize seed development by affecting RNA editing of mitochondrial transcript ccmC
文献类型: 外文期刊
第一作者: Chen, Rongrong
作者: Chen, Rongrong;Chen, Rongrong;Liu, Yan;Chen, Yan;Liu, Yunjun;Wei, Qianhan;Du, Xuemei;Wang, Jianhua;Li, Jiankun
作者机构:
关键词: Maize; Empty pericarp 601; PPR; Mitochondrial; Ccmc; Seed development
期刊名称:CROP JOURNAL ( 影响因子:6.6; 五年影响因子:6.5 )
ISSN: 2095-5421
年卷期: 2023 年 11 卷 5 期
页码:
收录情况: SCI
摘要: Although several pentatricopeptide repeat (PPR) proteins are involved in post-transcriptional processing of mitochondrial RNA, it is unclear which specific protein is involved in the RNA editing of ccmC in maize (Zea mays). Here we report the identification of the maize empty pericarp 601 (emp601) mutant and the map-based cloning of the Emp601 gene, which encodes an E2-type PPR protein that is targeted to mitochondria. A single-nucleotide deletion in the emp601 mutant caused a frameshift and introduced a premature stop codon into the predicted EMP601. This mutation was associated with reduced accumulation of mitochondrial complex III as well as with inhibition of growth and differentiation of basal endosperm transfer layer cells, leading to final degeneration of the embryo and endosperm. We determine that loss of EMP601 function prevents the C-to-U RNA editing of the mitochondrial transcript ccmC at position 358. EMP601 binds to the ccmC transcript and directly interacts with Multiple organellar RNA editing factor 8 and may be a component of the plant mitochondrial editosome. We conclude that EMP601 functions in RNA editing of mitochondrial ccmC transcripts and influences mitochondrial function and seed development. (c) 2023 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC
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