PSRP1 is not a ribosomal protein, but a ribosome-binding factor that is recycled by the ribosome-recycling factor (RRF) and elongation factor G (EF-G).

@article{Sharma2010PSRP1IN,
  title={PSRP1 is not a ribosomal protein, but a ribosome-binding factor that is recycled by the ribosome-recycling factor (RRF) and elongation factor G (EF-G).},
  author={Manjuli Rani Sharma and Alexandra D{\"o}nh{\"o}fer and Chandana Barat and Viter M{\'a}rquez and Partha Pratim Datta and Paola Fucini and Daniel N. Wilson and Rajendra Kumar Agrawal},
  journal={The Journal of biological chemistry},
  year={2010},
  volume={285 6},
  pages={4006-14}
}
Plastid-specific ribosomal proteins (PSRPs) have been proposed to play roles in the light-dependent regulation of chloroplast translation. Here we demonstrate that PSRP1 is not a bona fide ribosomal protein, but rather a functional homologue of the Escherichia coli cold-shock protein pY. Three-dimensional Cryo-electron microscopic (Cryo-EM) reconstructions reveal that, like pY, PSRP1 binds within the intersubunit space of the 70S ribosome, at a site overlapping the positions of mRNA and A- and… CONTINUE READING

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