Kinetic analysis of late steps of eukaryotic translation initiation.
Kinetic analysis of late steps of eukaryotic translation initiation.
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真核翻译启动的后期步骤的动力学分析。
DOI:
10.1016/j.jmb.2008.10.029
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发表时间:
2009-01-16
影响因子:
5.6
通讯作者:
Lorsch, Jon R.
中科院分区:
文献类型:
--
作者:
Acker, Michael G.;Shin, Byung-Sik;Nanda, Jagpreet S.;Saini, Adesh K.;Dever, Thomas E.;Lorsch, Jon R.
Little is known about the molecular mechanics of the late events of translation initiation in eukaryotes. We present a kinetic dissection of the transition from a pre-initiation complex (PIC) after start codon recognition to the final 80S initiation complex (IC). The resulting framework reveals that eIF5B actually accelerates the rate of ribosomal subunit joining and this acceleration is influenced by the conformation of the GTPase active site of the factor mediated by the bound nucleotide. eIF1A accelerates joining through its C-terminal interaction with eIF5B, and eIF1A release from the initiating ribosome, which occurs only after subunit joining, is accelerated by GTP hydrolysis by eIF5B. Following subunit joining, GTP hydrolysis by eIF5B alters the conformation of the final IC and clears a path to promote rapid release of eIF1A. Our data, coupled with previous work, indicate that eIF1A is present on the ribosome throughout the entire initiation process and plays key roles at every stage.
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影响因子:
5.3
作者:
Fringer, Jeanne M.;Acker, Michael G.;Dever, Thomas E.
通讯作者:
Dever, Thomas E.
影响因子:
4.5
作者:
Algire, MA;Maag, D;Lorsch, JR
通讯作者:
Lorsch, JR
DOI:
10.1073/pnas.95.1.224
发表时间:
1998-01-06
影响因子:
11.1
作者:
Kyrpides, NC;Woese, CR
通讯作者:
Woese, CR
影响因子:
56.9
作者:
Carter, AP;Clemons, WM;Ramakrishnan, V
通讯作者:
Ramakrishnan, V
影响因子:
11.4
作者:
Antoun, A;Pavlov, MY;Ehrenberg, M
通讯作者:
Ehrenberg, M