The potential for manipulating RNA with pentatricopeptide repeat proteins

Plant J. 2014 Jun;78(5):772-82. doi: 10.1111/tpj.12377. Epub 2014 Jan 29.


The pentatricopeptide repeat (PPR) protein family, which is particularly prevalent in plants, includes many sequence-specific RNA-binding proteins involved in all aspects of organelle RNA metabolism, including RNA stability, processing, editing and translation. PPR proteins consist of a tandem array of 2-30 PPR motifs, each of which aligns to one nucleotide in the RNA target. The amino acid side chains at two or three specific positions in each motif confer nucleotide specificity in a predictable and programmable manner. Thus, PPR proteins appear to provide an extremely promising opportunity to create custom RNA-binding proteins with tailored specificity. We summarize recent progress in understanding RNA recognition by PPR proteins, with a particular focus on potential applications of PPR-based tools for manipulating RNA, and on the challenges that remain to be overcome before these tools may be routinely used by the scientific community.

Keywords: PPR proteins; PUF proteins; RNA binding; sequence-specific; synthetic biology; transcription activator-like effectors.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Plant Proteins / metabolism*
  • Protein Binding
  • RNA, Plant / metabolism*
  • RNA-Binding Proteins / metabolism*
  • Synthetic Biology


  • Plant Proteins
  • RNA, Plant
  • RNA-Binding Proteins