3j0e
From Proteopedia
Contents |
Models for the T. thermophilus ribosome recycling factor and the E. coli elongation factor G bound to the E. coli post-termination complex
Template:ABSTRACT PUBMED 22388519
Function
[RS12_ECOLI] With S4 and S5 plays an important role in translational accuracy.[HAMAP-Rule:MF_00403_B] Interacts with and stabilizes bases of the 16S rRNA that are involved in tRNA selection in the A site and with the mRNA backbone. Located at the interface of the 30S and 50S subunits, it traverses the body of the 30S subunit contacting proteins on the other side and probably holding the rRNA structure together. The combined cluster of proteins S8, S12 and S17 appears to hold together the shoulder and platform of the 30S subunit (By similarity).[HAMAP-Rule:MF_00403_B] Cryo-EM studies suggest that S12 contacts the EF-Tu bound tRNA in the A-site during codon-recognition. This contact is most likely broken as the aminoacyl-tRNA moves into the peptidyl transferase center in the 50S subunit.[HAMAP-Rule:MF_00403_B] [EFG_ECOLI] Catalyzes the GTP-dependent ribosomal translocation step during translation elongation. During this step, the ribosome changes from the pre-translocational (PRE) to the post-translocational (POST) state as the newly formed A-site-bound peptidyl-tRNA and P-site-bound deacylated tRNA move to the P and E sites, respectively. Catalyzes the coordinated movement of the two tRNA molecules, the mRNA and conformational changes in the ribosome.[HAMAP-Rule:MF_00054_B] [RRF_THET8] Responsible for the release of ribosomes from messenger RNA at the termination of protein biosynthesis. May increase the efficiency of translation by recycling ribosomes from one round of translation to another (By similarity).
About this Structure
3j0e is a 9 chain structure with sequence from Escherichia coli and Thermus thermophilus. Full crystallographic information is available from OCA.
See Also
Reference
- Yokoyama T, Shaikh TR, Iwakura N, Kaji H, Kaji A, Agrawal RK. Structural insights into initial and intermediate steps of the ribosome-recycling process. EMBO J. 2012 Mar 2;31(7):1836-46. doi: 10.1038/emboj.2012.22. PMID:22388519 doi:10.1038/emboj.2012.22
