Journal
NATURE STRUCTURAL & MOLECULAR BIOLOGY
Volume 17, Issue 7, Pages 793-U35Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/nsmb.1828
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Funding
- US National Institutes of Health
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We report the direct observation of conformational rearrangements of the ribosome during multiple rounds of elongation. Using single-molecule fluorescence resonance energy transfer, we monitored the intersubunit conformation of the ribosome in real time as it proceeds from codon to codon. During each elongation cycle, the ribosome unlocks upon peptide bond formation, then reverts to the locked state upon translocation onto the next codon. Our data reveal both the specific and cumulative effects of antibiotics on individual steps of translation and uncover the processivity of the ribosome as it elongates. Our approach interrogates the precise molecular events occurring at each codon of the mRNA within the full context of ongoing translation.
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