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-Structure paper
タイトル | Visualizing tmRNA entry into a stalled ribosome. |
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ジャーナル・号・ページ | Science, Vol. 300, Issue 5616, Page 127-130, Year 2003 |
掲載日 | 2003年4月4日 |
著者 | Mikel Valle / Reynald Gillet / Sukhjit Kaur / Anke Henne / V Ramakrishnan / Joachim Frank / |
PubMed 要旨 | Bacterial ribosomes stalled on defective messenger RNAs (mRNAs) are rescued by tmRNA, an approximately 300-nucleotide-long molecule that functions as both transfer RNA (tRNA) and mRNA. Translation ...Bacterial ribosomes stalled on defective messenger RNAs (mRNAs) are rescued by tmRNA, an approximately 300-nucleotide-long molecule that functions as both transfer RNA (tRNA) and mRNA. Translation then switches from the defective message to a short open reading frame on tmRNA that tags the defective nascent peptide chain for degradation. However, the mechanism by which tmRNA can enter and move through the ribosome is unknown. We present a cryo-electron microscopy study at approximately 13 to 15 angstroms of the entry of tmRNA into the ribosome. The structure reveals how tmRNA could move through the ribosome despite its complicated topology and also suggests roles for proteins S1 and SmpB in the function of tmRNA. |
リンク | Science / PubMed:12677067 |
手法 | EM (単粒子) |
解像度 | 13.0 Å |
構造データ | |
由来 |
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キーワード | RNA binding protein/RNA / SmpB / tmRNA / EF-Tu / h44 / 30S / 16s rRNA / Cryo-EM / trans-translation / 70S / RNA binding protein-RNA COMPLEX |