Labeled EF-Tus for rapid kinetic studies of pretranslocation complex formation.
Labeled EF-Tus for rapid kinetic studies of pretranslocation complex formation.
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DOI:
10.1021/cb500409y
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发表时间:
2014-10-17
影响因子:
4
通讯作者:
Cooperman, Barry S.
中科院分区:
文献类型:
--
作者:
Liu, Wei;Kavaliauskas, Darius;Schrader, Jared M.;Poruri, Kiran;Birkedal, Victoria;Goldman, Emanuel;Jakubowski, Hieronim;Mandecki, Wlodek;Uhlenbeck, Olke C.;Knudsen, Charlotte R.;Goldman, Yale E.;Cooperman, Barry S.
The universally conserved translation elongation factor EF-Tu delivers aminoacyl(aa)-tRNA in the form of an aa-tRNA·EF-Tu·GTP ternary complex (TC) to the ribosome where it binds to the cognate mRNA codon within the ribosomal A-site, leading to formation of a pretranslocation (PRE) complex. Here we describe preparation of QSY9 and Cy5 derivatives of the variant E348C-EF-Tu that are functional in translation elongation. Together with fluorophore derivatives of aa-tRNA and of ribosomal protein L11, located within the GTPase associated center (GAC), these labeled EF-Tus allow development of two new FRET assays that permit the dynamics of distance changes between EF-Tu and both L11 (Tu-L11 assay) and aa-tRNA (Tu-tRNA assay) to be determined during the decoding process. We use these assays to examine: (i) the relative rates of EF-Tu movement away from the GAC and from aa-tRNA during decoding, (ii) the effects of the misreading-inducing antibiotics streptomycin and paromomycin on tRNA selection at the A-site, and (iii) how strengthening the binding of aa-tRNA to EF-Tu affects the rate of EF-Tu movement away from L11 on the ribosome. These FRET assays have the potential to be adapted for high throughput screening of ribosomal antibiotics.
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影响因子:
16.6
作者:
通讯作者:
--
DOI:
10.1016/j.bbapap.2011.02.007
发表时间:
2011-05-01
影响因子:
3.2
作者:
De Laurentiis, Evelina Ines;Mo, Fan;Wieden, Hans-Joachim
通讯作者:
Wieden, Hans-Joachim
影响因子:
14.9
作者:
Jonstrup AT;Andersen KR;Van LB;Brodersen DE
通讯作者:
Brodersen DE
影响因子:
14.9
作者:
Chiu, J;March, PE;Tillett, D
通讯作者:
Tillett, D
影响因子:
4.5
作者:
Pan, Dongli;Qin, Haiou;Cooperman, Barry S.
通讯作者:
Cooperman, Barry S.