Download MendeleyStructure of the ribosome post-recycling complex probed by chemical cross-linking and mass spectrometry.
Kiosze-Becker, K., Ori, A., Gerovac, M., Heuer, A., Nurenberg-Goloub, E., Rashid, U.J., Becker, T., Beckmann, R., Beck, M., Tampe, R.(2016) Nat Commun 7: 13248-13248
- PubMed: 27824037
- DOI: https://doi.org/10.1038/ncomms13248
- Primary Citation of Related Structures:
5LW7 - PubMed Abstract:
Ribosome recycling orchestrated by the ATP binding cassette (ABC) protein ABCE1 can be considered as the final-or the first-step within the cyclic process of protein synthesis, connecting translation termination and mRNA surveillance with re-initiation. An ATP-dependent tweezer-like motion of the nucleotide-binding domains in ABCE1 transfers mechanical energy to the ribosome and tears the ribosome subunits apart. The post-recycling complex (PRC) then re-initiates mRNA translation. Here, we probed the so far unknown architecture of the 1-MDa PRC (40S/30S·ABCE1) by chemical cross-linking and mass spectrometry (XL-MS). Our study reveals ABCE1 bound to the translational factor-binding (GTPase) site with multiple cross-link contacts of the helix-loop-helix motif to the S24e ribosomal protein. Cross-linking of the FeS cluster domain to the ribosomal protein S12 substantiates an extreme lever-arm movement of the FeS cluster domain during ribosome recycling. We were thus able to reconstitute and structurally analyse a key complex in the translational cycle, resembling the link between translation initiation and ribosome recycling.
Organizational Affiliation:
Institute of Biochemistry, Biocenter, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438 Frankfurt a.M., Germany.
