Translation Termination Mechanism
Translation Termination Mechanism - Related Videos
01:44
Termination of Translation
0 Views •
2020
The large ribosomal subunit has several important structures essential to translation. These include the peptidyl transferase center (PTC) - which is the site where the peptide bond is formed - and a large, internal, water-filled tube through which the nascent polypeptide moves. This latter structure is called the Peptide Exit Tunnel, and it begins at the PTC and spans the body of the large ribosomal subunit. During translation, as the nascent polypeptide chain is synthesized, it passes through...
01:44
Termination of Translation
0 Views •
2023
The large ribosomal subunit has several important structures essential to translation. These include the peptidyl transferase center (PTC) - which is the site where the peptide bond is formed - and a large, internal, water-filled tube through which the nascent polypeptide moves. This latter structure is called the Peptide Exit Tunnel, and it begins at the PTC and spans the body of the large ribosomal subunit. During translation, as the nascent polypeptide chain is synthesized, it passes through...
03:18
Combined Recording of Mechanically Stimulated Afferent Output and Nerve Terminal Labelling in Mouse Hair Follicles
0 Views •
2025
This video demonstrates the combined recording of mechanically stimulated afferent output and nerve terminal labeling in the hair follicles of a mouse pinna. It outlines the steps involved in the mechanical stimulation of hair follicle nerve terminals before and after exposure to a fluorescent membrane dye, electrophysiology recording of the generated action potentials, and visualization of the nerve terminal labeling in the hair follicles.
14:44
Isolation of mRNAs Associated with Yeast Mitochondria to Study Mechanisms of Localized Translation
0 Views •
Cited by 6 •
2014
Many mRNAs encoding mitochondrial proteins are associated with the mitochondria outer membrane. We describe a subcellular fractionation procedure aimed at isolation of yeast mitochondria with its associated mRNAs and ribosomes. This protocol can be applied to cells grown under diverse conditions in order to reveal mechanisms of mRNA localization and localized translation near the mitochondria.
13:04
Combined Recording of Mechanically Stimulated Afferent Output and Nerve Terminal Labelling in Mouse Hair Follicle Lanceolate Endings
0 Views •
2016
A simple and novel technique for recording afferent discharge due to mechanical stimulation of lanceolate terminals of palisade endings innervating mouse ear skin hair follicles is presented.
FAQs
Release factors substitute for the missing tRNA signal at the ribosome’s decoding center. Their recognition of UAA, UAG, or UGA directs the ribosome toward peptide release rather than addition of another amino acid. This distinction allows the translation machinery to interpret a termination signal accurately and prevents protein synthesis from continuing beyond the encoded polypeptide.
Hydrolysis breaks the bond linking the finished polypeptide to its tRNA. That chemical step converts recognition of a stop codon into physical release of the protein, rather than merely pausing the ribosome. Because release follows this bond cleavage, termination produces a completed polypeptide that can leave the translation complex.
An ordinary codon is matched by a tRNA, allowing its amino acid to be incorporated into the growing chain. At termination, UAA, UAG, or UGA has no matching tRNA, so the ribosome switches from chain extension to release-factor-mediated protein release. This contrast provides the molecular basis for ending synthesis at the correct position rather than adding another residue.
Researchers can follow the sequence from stop-codon entry into the decoding center, through release-factor recognition and bond hydrolysis, to separation of ribosomal subunits, messenger RNA, and transfer RNA. This framework helps analyze whether termination occurs at the intended signal and whether the translation components become available for recycling.
After peptide release, the ribosomal subunits, messenger RNA, and transfer RNA separate from one another. This organization does more than mark the end of one translation event: it prepares the individual components for recycling. In biology, that outcome links termination to continued use of the translation machinery and supports successive protein-production events.
Termination provides a reference point for studying stop-codon mutations and premature termination. Investigators can examine whether an altered or early signal changes the expected endpoint of protein synthesis and polypeptide release. These observations connect ribosome behavior with accurate gene expression, making termination relevant to research on how cells control protein production.