The structure of the ribosome with elongation factor G trapped in the posttranslocational state.
The structure of the ribosome with elongation factor G trapped in the posttranslocational state.
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DOI:
10.1126/science.1179709
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发表时间:
2009-10-30
期刊:
影响因子:
--
通讯作者:
Ramakrishnan V
中科院分区:
文献类型:
--
作者:
Gao YG;Selmer M;Dunham CM;Weixlbaumer A;Kelley AC;Ramakrishnan V
Elongation factor G (EF-G) is a GTPase that plays a crucial role in the translocation of tRNAs and mRNA during translation by the ribosome. We report a crystal structure refined to 3.6 Å resolution of the ribosome trapped with EF-G in the post-translocational state using the antibiotic fusidic acid. Fusidic acid traps EF-G in a conformation intermediate between the GTP and GDP forms. The interaction of EF-G with ribosomal elements implicated in stimulating catalysis, such as the L10-L12 stalk and the L11 region, and of domain IV of EF-G with P-site tRNA and mRNA shed light on various aspects of EF-G function in catalysis and translocation. The stabilization of the mobile stalks of the ribosome also results in a more complete description of its structure.
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DOI:
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