Abstract
Transfer RNA (tRNA) translocates inside the ribosome during translation. We studied the interaction strengths between the ribosome and tRNA at various stages of translocation. We utilized an optical trap to measure the mechanical force to rupture tRNA from the ribosome. We measured the rupture forces of aminoacyl tRNA or peptidyl tRNA mimic from the ribosome in a prepeptidyl transfer state, the pretranslocational state, and the posttranslocational state. In addition, we measured the interaction strength between the ribosome and aminoacyl-tRNA in presence of viomycin. Based on the interaction strengths between the ribosome and tRNA under these conditions, 1), we concluded that tRNA interaction with the 30S subunit is far more important than the interaction with the 50S subunit in the mechanism of translocation; and 2), we propose a mechanism of translocation where the ribosomal ratchet motion, with the aid of EF-G, drives tRNA translocation.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2201-2208 |
| Number of pages | 8 |
| Journal | Biophysical Journal |
| Volume | 100 |
| Issue number | 9 |
| DOIs | |
| State | Published - May 4 2011 |
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All Science Journal Classification (ASJC) codes
- Biophysics
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Interaction strengths between the ribosome and tRNA at various steps of translocation. / Liu, Chen Yu; Qureshi, Mohd Tanvir; Lee, Tae-hee.
In: Biophysical Journal, Vol. 100, No. 9, 04.05.2011, p. 2201-2208.Research output: Contribution to journal › Article
TY - JOUR
T1 - Interaction strengths between the ribosome and tRNA at various steps of translocation
AU - Liu, Chen Yu
AU - Qureshi, Mohd Tanvir
AU - Lee, Tae-hee
PY - 2011/5/4
Y1 - 2011/5/4
N2 - Transfer RNA (tRNA) translocates inside the ribosome during translation. We studied the interaction strengths between the ribosome and tRNA at various stages of translocation. We utilized an optical trap to measure the mechanical force to rupture tRNA from the ribosome. We measured the rupture forces of aminoacyl tRNA or peptidyl tRNA mimic from the ribosome in a prepeptidyl transfer state, the pretranslocational state, and the posttranslocational state. In addition, we measured the interaction strength between the ribosome and aminoacyl-tRNA in presence of viomycin. Based on the interaction strengths between the ribosome and tRNA under these conditions, 1), we concluded that tRNA interaction with the 30S subunit is far more important than the interaction with the 50S subunit in the mechanism of translocation; and 2), we propose a mechanism of translocation where the ribosomal ratchet motion, with the aid of EF-G, drives tRNA translocation.
AB - Transfer RNA (tRNA) translocates inside the ribosome during translation. We studied the interaction strengths between the ribosome and tRNA at various stages of translocation. We utilized an optical trap to measure the mechanical force to rupture tRNA from the ribosome. We measured the rupture forces of aminoacyl tRNA or peptidyl tRNA mimic from the ribosome in a prepeptidyl transfer state, the pretranslocational state, and the posttranslocational state. In addition, we measured the interaction strength between the ribosome and aminoacyl-tRNA in presence of viomycin. Based on the interaction strengths between the ribosome and tRNA under these conditions, 1), we concluded that tRNA interaction with the 30S subunit is far more important than the interaction with the 50S subunit in the mechanism of translocation; and 2), we propose a mechanism of translocation where the ribosomal ratchet motion, with the aid of EF-G, drives tRNA translocation.
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U2 - 10.1016/j.bpj.2011.03.023
DO - 10.1016/j.bpj.2011.03.023
M3 - Article
C2 - 21539788
AN - SCOPUS:79959742673
VL - 100
SP - 2201
EP - 2208
JO - Biophysical Journal
JF - Biophysical Journal
SN - 0006-3495
IS - 9
ER -