Nature Structural and Molecular Biology, volume 12, issue 12, pages 1145-1149
Conformational transition of initiation factor 2 from the GTP- to GDP-bound state visualized on the ribosome
Myasnikov Alexander G.
1
,
Marzi Stefano
1, 2
,
Simonetti Angelita
1
,
Giuliodori Anna Maria
3
,
Gualerzi Claudio O.
3
,
Yusupova Gulnara
1
,
Yusupov Marat
1, 2
,
Klaholz Bruno P.
1
1
Department of Structural Biology and Genomics, Institute of Genetics and Molecular and Cellular Biology, Centre National de la Recherche Scientifique (CNRS)/Institut National de la Santé et de la Recherche Médicale (INSERM)/Université Louis Pasteur, B.P. 10142, Illkirch, France
|
2
Institut de Biologie Moléculaire et Cellulaire, CNRS, Strasbourg, France
|
Publication type: Journal Article
Publication date: 2005-11-13
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 16.8
ISSN: 15459993, 15459985
DOI:
10.1038/nsmb1012
Molecular Biology
Structural Biology
Abstract
Initiation of protein synthesis is a universally conserved event that requires initiation factors IF1, IF2 and IF3 in prokaryotes. IF2 is a GTPase essential for binding initiator transfer RNA to the 30S ribosomal subunit and recruiting the 50S subunit into the 70S initiation complex. We present two cryo-EM structures of the assembled 70S initiation complex comprising mRNA, fMet-tRNAfMet and IF2 with either a non-hydrolyzable GTP analog or GDP. Transition from the GTP-bound to the GDP-bound state involves substantial conformational changes of IF2 and of the entire ribosome. In the GTP analog–bound state, IF2 interacts mostly with the 30S subunit and extends to the initiator tRNA in the peptidyl (P) site, whereas in the GDP-bound state IF2 steps back and adopts a 'ready-to-leave' conformation. Our data also provide insights into the molecular mechanism guiding release of IF1 and IF3.
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Myasnikov A. G. et al. Conformational transition of initiation factor 2 from the GTP- to GDP-bound state visualized on the ribosome // Nature Structural and Molecular Biology. 2005. Vol. 12. No. 12. pp. 1145-1149.
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Myasnikov A. G., Marzi S., Simonetti A., Giuliodori A. M., Gualerzi C. O., Yusupova G., Yusupov M., Klaholz B. P. Conformational transition of initiation factor 2 from the GTP- to GDP-bound state visualized on the ribosome // Nature Structural and Molecular Biology. 2005. Vol. 12. No. 12. pp. 1145-1149.
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RIS
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TY - JOUR
DO - 10.1038/nsmb1012
UR - https://doi.org/10.1038%2Fnsmb1012
TI - Conformational transition of initiation factor 2 from the GTP- to GDP-bound state visualized on the ribosome
T2 - Nature Structural and Molecular Biology
AU - Myasnikov, Alexander G.
AU - Marzi, Stefano
AU - Simonetti, Angelita
AU - Giuliodori, Anna Maria
AU - Gualerzi, Claudio O.
AU - Yusupova, Gulnara
AU - Yusupov, Marat
AU - Klaholz, Bruno P.
PY - 2005
DA - 2005/11/13 00:00:00
PB - Springer Nature
SP - 1145-1149
IS - 12
VL - 12
SN - 1545-9993
SN - 1545-9985
ER -
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@article{2005_Myasnikov,
author = {Alexander G. Myasnikov and Stefano Marzi and Angelita Simonetti and Anna Maria Giuliodori and Claudio O. Gualerzi and Gulnara Yusupova and Marat Yusupov and Bruno P. Klaholz},
title = {Conformational transition of initiation factor 2 from the GTP- to GDP-bound state visualized on the ribosome},
journal = {Nature Structural and Molecular Biology},
year = {2005},
volume = {12},
publisher = {Springer Nature},
month = {nov},
url = {https://doi.org/10.1038%2Fnsmb1012},
number = {12},
pages = {1145--1149},
doi = {10.1038/nsmb1012}
}
Cite this
MLA
Copy
Myasnikov, Alexander G., et al. “Conformational transition of initiation factor 2 from the GTP- to GDP-bound state visualized on the ribosome.” Nature Structural and Molecular Biology, vol. 12, no. 12, Nov. 2005, pp. 1145-1149. https://doi.org/10.1038%2Fnsmb1012.