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Hereditas(Beijing) ›› 2021, Vol. 43 ›› Issue (11): 1050-1065.doi: 10.16288/j.yczz.21-233

• Orginal Articles • Previous Articles     Next Articles

The role of PPR proteins in posttranscriptional regulation of organelle components in plants

Yuanyuan Hao(), Xiangqian Zhao, Fudeng Huang, Chunshou Li()   

  1. Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
  • Received:2021-06-30 Revised:2021-08-20 Online:2021-11-20 Published:2021-10-25
  • Contact: Li Chunshou E-mail:499085663@qq.com;lichunshou@126.com
  • Supported by:
    Supported by the National Natural Science Foundation of China No(32001524)

Abstract:

Pentatricopeptide repeat (PPR) proteins constitute one of the largest protein families in land plants. They are sequence-specific RNA-binding proteins and play key roles in posttranscriptional processes within organelles. Their combined actions have profound effects on chloroplast photosynthetic electron transport chain and mitochondrial respiratory chain, affecting photosynthesis and respiration respectively, and ultimately on yield, fertility, and grain quality. Over the past decade, much has been learned about the molecular functions of these proteins on plant growth and development. However, due to the large size of this protein family, the functions of most members remain largely unknown. Here, we summarize the molecular mechanisms of PPR proteins functions on organelle genes, and effects on development of organelles and plants. Problems that need to be resolved are also identified. This article will provide a theoretical basis for understanding the functions of PPR protein family and genetic improvements of grain yield and quality.

Key words: PPR proteins, post-transcriptional regulation, organelle metabolism, plant growth and development