Single copies of Sec61 and TRAP associate with a nontranslating mammalian ribosome.
Single copies of Sec61 and TRAP associate with a nontranslating mammalian ribosome.
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Sec61和陷阱的单副本与非翻译哺乳动物核糖体相关。
DOI:
10.1016/j.str.2008.05.003
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发表时间:
2008-07
期刊:
影响因子:
5.7
通讯作者:
Akey, Christopher W.
中科院分区:
文献类型:
--
作者:
Menetret, Jean-Francois;Hegde, Ramanujan S.;Aguiar, Mike;Gygi, Steven P.;Park, Eunyong;Rapoport, Tom A.;Akey, Christopher W.
During co-translational protein translocation, the ribosome associates with a membrane channel, formed by the Sec61 complex, and recruits the translocon-associated protein complex (TRAP). Here, we report the structure of a ribosome-channel complex from mammalian endoplasmic reticulum in which the channel has been visualized at 11Å resolution. In this complex, single copies of Sec61 and TRAP associate with a non-translating ribosome and this stoichiometry was verified by quantitative mass spectrometry. A bilayer-like density surrounds the channel and can be attributed to lipid and detergent. The crystal structure of an archaeal homolog of the Sec61 complex was then docked into the map. In this model, two cytoplasmic loops of Sec61 may interact with RNA helices H6, H7 and H50, while the central pore is located below the ribosome tunnel exit. Hence, this copy of Sec61 is positioned to capture and translocate the nascent chain. Finally, we show that mammalian and bacterial ribosome-channel complexes have similar architectures.
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DOI:
10.1083/jcb.200412019
发表时间:
2005-04-25
期刊:
The Journal of cell biology
影响因子:
--
作者:
Cannon KS;Or E;Clemons WM Jr;Shibata Y;Rapoport TA
通讯作者:
Rapoport TA
DOI:
10.1073/pnas.0607541103
发表时间:
2006-10-24
影响因子:
11.1
作者:
Berk, Veysel;Zhang, Wen;Cate, Jamie H. Doudna
通讯作者:
Cate, Jamie H. Doudna
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
64.8
作者:
Egea, PF;Shan, SO;Stroud, RM
通讯作者:
Stroud, RM
影响因子:
5.7
作者:
Goddard, TD;Huang, CC;Ferrin, TE
通讯作者:
Ferrin, TE