Related Experiment Videos
The ribosome through the looking glass
Daniel N Wilson1, Knud H Nierhaus
1Max-Planck-Institut für molekulare Genetik, Ihnestrasse 73, 14195 Berlin, Germany.
Angewandte Chemie (International Ed. in English)
|August 6, 2003
Summary
Crystallography has revealed the atomic structure of bacterial ribosomes, the cell's largest RNA-protein complex. This breakthrough, combined with cryo-EM, visualizes the ribosome's translation cycle, showing conserved features across organisms.
Area of Science:
- Structural Biology
- Molecular Biology
- Biochemistry
Background:
- Ribosomes, essential RNA-protein complexes, are crucial for protein synthesis.
- Bacterial ribosomes are large, with over 4000 ribonucleotides and 54 proteins.
- Solving the ribosome's structure has been a long-standing challenge in crystallography.
Purpose of the Study:
- To review the bacterial ribosome structure and function throughout the translation cycle.
- To highlight conserved structural features across different organisms.
- To integrate structural data with functional insights from cryo-electron microscopy.
Main Methods:
- X-ray crystallography to determine high-resolution structures of ribosomal subunits and the complete 70S ribosome.
- Ligand soaking experiments (antibiotics, substrate analogs, translational factors) to probe function.
- Cryo-electron microscopy (cryo-EM) to study translation complexes in action.
Main Results:
- Atomic-level structures of bacterial ribosomal subunits and the complete 70S ribosome from Thermus thermophilus have been resolved.
- Ligand binding studies have advanced the understanding of key ribosomal functions.
- Cryo-EM studies provide dynamic snapshots of the ribosome during translation.
- Yeast ribosomes exhibit significant structural similarity to bacterial ribosomes.
Conclusions:
- The structure of the bacterial ribosome is now well-defined at atomic resolution.
- Structural insights, combined with dynamic studies, offer a comprehensive view of translation.
- Conserved structural features underscore the universal importance of the ribosome in all life forms.