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3fih
From Proteopedia
Contents |
Ternary complex-bound E.coli 70S ribosome. This entry consists of the 30S subunit, tRNAs and the ternary complex.
In translation, elongation factor Tu (EF-Tu) molecules deliver aminoacyl-tRNAs to the mRNA-programmed ribosome. The GTPase activity of EF-Tu is triggered by ribosome-induced conformational changes of the factor that play a pivotal role in the selection of the cognate aminoacyl-tRNAs. We present a 6.7-A cryo-electron microscopy map of the aminoacyl-tRNA x EF-Tu x GDP x kirromycin-bound Escherichia coli ribosome, together with an atomic model of the complex obtained through molecular dynamics flexible fitting. The model reveals the conformational changes in the conserved GTPase switch regions of EF-Tu that trigger hydrolysis of GTP, along with key interactions, including those between the sarcin-ricin loop and the P loop of EF-Tu, and between the effector loop of EF-Tu and a conserved region of the 16S rRNA. Our data suggest that GTP hydrolysis on EF-Tu is controlled through a hydrophobic gate mechanism.
Ribosome-induced changes in elongation factor Tu conformation control GTP hydrolysis., Villa E, Sengupta J, Trabuco LG, LeBarron J, Baxter WT, Shaikh TR, Grassucci RA, Nissen P, Ehrenberg M, Schulten K, Frank J, Proc Natl Acad Sci U S A. 2009 Jan 27;106(4):1063-8. Epub 2009 Jan 2. PMID:19122150
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
About this Structure
3fih is a 26 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA.
See Also
- Ribosomal protein S10
- Ribosomal protein S11
- Ribosomal protein S12
- Ribosomal protein S13
- Ribosomal protein S14
- Ribosomal protein S15
- Ribosomal protein S16
- Ribosomal protein S17
- Ribosomal protein S18
- Ribosomal protein S19
- Ribosomal protein S2
- Ribosomal protein S20
- Ribosomal protein S21
- Ribosomal protein S3
- Ribosomal protein S4
- Ribosomal protein S5
- Ribosomal protein S6
- Ribosomal protein S7
- Ribosomal protein S8
- Ribosomal protein S9
Reference
- Villa E, Sengupta J, Trabuco LG, LeBarron J, Baxter WT, Shaikh TR, Grassucci RA, Nissen P, Ehrenberg M, Schulten K, Frank J. Ribosome-induced changes in elongation factor Tu conformation control GTP hydrolysis. Proc Natl Acad Sci U S A. 2009 Jan 27;106(4):1063-8. Epub 2009 Jan 2. PMID:19122150
Categories: Escherichia coli | Baxter, W T. | Ehrenberg, M. | Frank, J. | Grassucci, R A. | LeBarron, J. | Nissen, P. | Schulten, K. | Sengupta, J. | Shaikh, T R. | Trabuco, L G. | Villa, E. | 30 | 50 | 70 | Antibiotic resistance | Cell membrane | Cryo-em | Ef-tu | Elongation factor | Endonuclease | Flexible fitting | Gtp-binding | Hydrolase | Membrane | Methylation | Mrna | Nuclease | Nucleotide-binding | Phosphoprotein | Protein biosynthesis | Repressor | Ribonucleoprotein | Ribosomal protein | Ribosome | Rna-binding | Rrna-binding | Ternary complex | Transcription | Transcription regulation | Transcription termination | Translation regulation | Trna | Trna-binding
