Translation Elongation
Translation Elongation - Related Videos
02:35
Transcription Elongation Factors
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2020
Transcription elongation is a dynamic process that alters depending upon the sequence heterogeneity of the DNA being transcribed. Hence, it is not surprising that the elongation complex's composition also varies along the way while transcribing a gene. The transcription elongation is regulated via pausing of RNA polymerase on several occasions during transcription. In bacteria, these halts are necessary because the transcription of DNA into mRNA is coupled to the translation of that mRNA into a...
02:35
Transcription Elongation Factors
0 Views •
2023
Transcription elongation is a dynamic process that alters depending upon the sequence heterogeneity of the DNA being transcribed. Hence, it is not surprising that the elongation complex's composition also varies along the way while transcribing a gene. The transcription elongation is regulated via pausing of RNA polymerase on several occasions during transcription. In bacteria, these halts are necessary because the transcription of DNA into mRNA is coupled to the translation of that mRNA into a...
02:07
Improving Translational Accuracy
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2020
Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...
10:46
Novel Metrics to Characterize Embryonic Elongation of the Nematode Caenorhabditis elegans
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Cited by 3 •
2016
Here we detail protocols specifically designed to monitor morphogenic defects that occur during early and late phases of embryonic elongation of the nematode Caenorhabditis elegans. Ultimately, these protocols are designed to identify genes that regulate these phases and to characterize their differential requirements along the antero-posterior axis of the embryo.
02:33
Initiation of Translation
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2020
Initiating translation is complex because it involves multiple molecules. Initiator tRNA, ribosomal subunits, and eukaryotic initiation factors (eIFs) are all required to assemble on the initiation codon of mRNA. This process consists of several steps that are mediated by different eIFs. First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...
FAQs
Accuracy depends on matching each incoming aminoacyl-tRNA to the messenger RNA codon exposed in the ribosome’s A site. Elongation factors help check this complementary recognition before the cycle proceeds. This checkpoint links the nucleotide sequence in messenger RNA to the correct amino acid, helping the ribosome extend the polypeptide chain according to the encoded information.
Peptide-bond formation connects the newly selected amino acid to the growing chain, while GTP-driven translocation shifts the ribosome to the next messenger RNA codon. These events perform different but connected tasks: one lengthens the polypeptide, and the other positions the ribosome for another selection step. Their repeated coordination allows sequential protein synthesis.
GTP provides energy for translocation, the movement that advances the ribosome along messenger RNA after each peptide-bond-forming step. This energy-dependent movement prevents the process from remaining fixed at one codon and supports continued decoding. Because elongation repeats this cycle, GTP-driven translocation is central to maintaining forward progress during protein production.
A useful workflow follows the ordered events within one ribosomal cycle: an aminoacyl-tRNA enters the A site, complementary codon recognition is checked with elongation-factor assistance, a peptide bond forms, and GTP-driven translocation advances the ribosome. Repeating this sequence provides a framework for examining how the growing polypeptide changes as messenger RNA is decoded.
Investigating this stage is useful when researchers want to understand how cells regulate protein production, maintain accurate synthesis, or respond to stress. It also provides context for examining how disruptions in protein production may relate to genetic disease. These research directions connect a ribosome-level process with broader questions about cellular function and gene expression.
The elongation stage is relevant to antibiotic research because protein synthesis is a defined cellular process whose molecular events can be examined in relation to antimicrobial investigation. It also supports biotechnology by clarifying how messenger RNA information becomes a protein product. Understanding these steps helps connect molecular mechanisms with efforts involving disease research and engineered biological systems.