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TitleStudy of the structural dynamics of the E coli 70S ribosome using real-space refinement.
Journal, issue, pagesCell, Vol. 113, Issue 6, Page 789-801, Year 2003
Publish dateJun 13, 2003
AuthorsHaixiao Gao / Jayati Sengupta / Mikel Valle / Andrei Korostelev / Narayanan Eswar / Scott M Stagg / Patrick Van Roey / Rajendra K Agrawal / Stephen C Harvey / Andrej Sali / Michael S Chapman / Joachim Frank /
PubMed AbstractCryo-EM density maps showing the 70S ribosome of E. coli in two different functional states related by a ratchet-like motion were analyzed using real-space refinement. Comparison of the two resulting ...Cryo-EM density maps showing the 70S ribosome of E. coli in two different functional states related by a ratchet-like motion were analyzed using real-space refinement. Comparison of the two resulting atomic models shows that the ribosome changes from a compact structure to a looser one, coupled with the rearrangement of many of the proteins. Furthermore, in contrast to the unchanged inter-subunit bridges formed wholly by RNA, the bridges involving proteins undergo large conformational changes following the ratchet-like motion, suggesting an important role of ribosomal proteins in facilitating the dynamics of translation.
External linksCell / PubMed:12809609
MethodsEM (single particle)
Resolution11.5 - 12.3 Å
Structure data

PDB-4v47:
Real space refined coordinates of the 30S and 50S subunits fitted into the low resolution cryo-EM map of the EF-G.GTP state of E. coli 70S ribosome
Method: ELECTRON MICROSCOPY / Resolution: 12.3 Å

PDB-4v48:
Real space refined coordinates of the 30S and 50S subunits fitted into the low resolution cryo-EM map of the initiation-like state of E. coli 70S ribosome
Method: ELECTRON MICROSCOPY / Resolution: 11.5 Å

Source
  • escherichia coli (E. coli)
KeywordsRIBOSOME / EF-G.GTP-bound state / ratchet-like movement / real-space refinement

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