Translation Regulation
Translation Regulation - Related Videos
01:29
Translational Regulation
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2025
Translational regulation in prokaryotes ensures efficient protein synthesis by controlling ribosome access to mRNA. This regulation is mediated by secondary RNA structures, including translational riboswitches, RNA thermometers, and small RNAs (sRNAs), which respond to intracellular and environmental signals to modulate gene expression.Translational RiboswitchesRiboswitches in the leader region of mRNAs can regulate translation by altering the accessibility of the Shine-Dalgarno (SD) sequence,...
04:25
Reporter Gene Repression Assay to Study Translational Regulation of a Target Gene
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2025
This video demonstrates an in vivo assay in bacteria to study the interaction of RNA-binding proteins (RBPs) with RNA. The bacterial cells are transformed with two plasmid constructs — a binding-site plasmid encoding an mRNA containing a fluorescent reporter gene downstream of an RBP-binding site — while an RBP plasmid expresses the RBP proteins under the control of an inducer. Upon inducer-mediated increase in RBP production, the RBPs bind to the mRNA, resulting in translational repression of...
01:46
Epigenetic Regulation
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2019
Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer. In most mammals, females have two X chromosomes (XX) while males have an X and a Y chromosome (XY). The X chromosome contains significantly more genes than the Y chromosome. Therefore, to prevent an excess of X chromosome-linked gene expression in females, one of the two X chromosomes is randomly silenced during early development.
12:26
Optical Tweezers to Study RNA-Protein Interactions in Translation Regulation
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Cited by 5 •
2022
This protocol presents a complete experimental workflow for studying RNA-protein interactions using optical tweezers. Several possible experimental setups are outlined including the combination of optical tweezers with confocal microscopy.
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
Initiation is a major control point because it determines whether a ribosome can be recruited to an mRNA and reach its coding sequence. Regulatory factors and proteins can increase or restrict this access, changing protein output before the coding region is translated. This provides cells with a rapid way to adjust expression as conditions change.
Changes in messenger RNA structure can alter how easily regulatory factors or ribosomes access the coding sequence. A folded region may make that sequence less accessible, whereas a different structural arrangement may permit access. Consequently, the same mRNA can support different levels of protein production depending on its structural state, linking RNA architecture to regulated gene expression.
Upstream open reading frames, or uORFs, are sequence features positioned before the main coding sequence of an mRNA. Their presence can influence whether translation proceeds efficiently into the primary coding region. By affecting access to that downstream sequence, uORFs provide an additional regulatory layer that can adjust protein output from an otherwise unchanged messenger RNA.
Small regulatory RNAs provide another way to influence translation through effects on messenger RNA access or use. Rather than altering the underlying DNA sequence, they can change how effectively the coding information is reached and translated. Their contribution helps explain how cells fine-tune protein production while preserving the same genetic information.
Translation regulation changes protein output from messenger RNA without requiring a change in the DNA sequence. Because it acts on the use of existing RNA, this control can adjust production at the protein-making stage and respond rapidly to cellular needs. The distinction is useful when interpreting changes in protein abundance that do not reflect altered genetic information.
Nutrient availability, stress, and developmental state can alter the regulatory conditions that govern ribosome access and coding-sequence translation. Cells can therefore redirect protein production to match their current circumstances rather than maintaining a fixed output. This flexibility supports coordinated changes in gene expression across changing physiological contexts.
Studying translation regulation can reveal how abnormal control of protein production contributes to disease. Research in this area connects altered use of messenger RNA with disorders involving gene-expression abnormalities, including cancer and inherited disease. Examining these regulatory mechanisms helps clarify how the same DNA information can produce inappropriate protein levels in a pathological context.