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The elongation and membrane targeting stages of eukaryotic translation. The ribosome is green and yellow, the tRNAs are dark-blue, and the other proteins involved are light-blue. Elongation depends on eukaryotic elongation factors. At the end of the initiation step, the mRNA is positioned so that the next codon can be translated during the ...
The elongation phase starts once assembly of the elongation complex has been completed, and progresses until a termination sequence is encountered. [1] The post-initiation movement of RNA polymerase is the target of another class of important regulatory mechanisms.
The elongation factor EF-Tu has been shown to stabilize the bond by preventing weak acyl linkages from being hydrolyzed. [ 12 ] All together, the actual stability of the ester bond influences the susceptibility of the aa-tRNA to hydrolysis within the body at physiological pH and ion concentrations.
EF-Tu (elongation factor thermo unstable) is a prokaryotic elongation factor responsible for catalyzing the binding of an aminoacyl-tRNA (aa-tRNA) to the ribosome. It is a G-protein , and facilitates the selection and binding of an aa-tRNA to the A-site of the ribosome.
Most common elongation factors in prokaryotes are EF-Tu, EF-Ts, EF-G. [1] Bacteria and eukaryotes use elongation factors that are largely homologous to each other, but with distinct structures and different research nomenclatures. [2] Elongation is the most rapid step in translation. [3]
The size of a transcription bubble ranges from 12 to 14 base pairs. A transcription bubble is formed when the RNA polymerase enzyme binds to a promoter and causes two DNA strands to detach. [1] It presents a region of unpaired DNA, where a short stretch of nucleotides are exposed on each strand of the double helix. [1] [2]
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