1pn7

Coordinates of S12, L11 proteins and P-tRNA, from the 70S X-ray structure aligned to the 70S Cryo-EM map of E.coli ribosome

spinqualitylabelsall models 1pn7, resolution 10.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1pn7 is a 3 chain structure with sequence from Thermotoga maritima and Thermus thermophilus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 1gix, 1giy, 1pn6, 1pn8 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [RL11_THEMA] This protein binds directly to 23S ribosomal RNA. [RS12_THET8] With S4 and S5 plays an important role in translational accuracy (By similarity).[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.[HAMAP-Rule:MF_00403_B] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed During the ribosomal translocation, the binding of elongation factor G (EF-G) to the pretranslocational ribosome leads to a ratchet-like rotation of the 30S subunit relative to the 50S subunit in the direction of the mRNA movement. By means of cryo-electron microscopy we observe that this rotation is accompanied by a 20 A movement of the L1 stalk of the 50S subunit, implying that this region is involved in the translocation of deacylated tRNAs from the P to the E site. These ribosomal motions can occur only when the P-site tRNA is deacylated. Prior to peptidyl-transfer to the A-site tRNA or peptide removal, the presence of the charged P-site tRNA locks the ribosome and prohibits both of these motions. Locking and unlocking of ribosomal motions.,Valle M, Zavialov A, Sengupta J, Rawat U, Ehrenberg M, Frank J Cell. 2003 Jul 11;114(1):123-34. PMID:12859903 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ribosomal protein L11 Ribosomal protein S12 Transfer RNA (tRNA)

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