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Related Concept Videos

RNA Structure01:23

RNA Structure

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Overview
The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
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There are three main types of ribonucleic acid (RNA): messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three RNA types consist of a...
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RNA Structure01:19

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The basic structure of RNA consists of a string of ribonucleotides attached by phosphodiester bonds. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
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Translation01:31

Translation

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Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
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Coordination Number and Geometry02:57

Coordination Number and Geometry

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For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
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Termination of Translation01:44

Termination of Translation

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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...
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Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
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Updated: Feb 7, 2026

Optical Tweezers to Study RNA-Protein Interactions in Translation Regulation
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Optical Tweezers to Study RNA-Protein Interactions in Translation Regulation

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RNA Structure Coordinates Translation Across the Meiotic Program.

Hao Wu1,2, Caini Zhou1, Shoucheng Du1

  • 1School of Life Science and Technology, ShanghaiTech University, 201210 Shanghai, China.

Biorxiv : the Preprint Server for Biology
|February 6, 2026
PubMed
Summary
This summary is machine-generated.

Cellular mRNA structures dynamically regulate translation during yeast meiosis. RNA helicases coordinate these structures, impacting protein production and meiotic progression when transcription is limited.

Keywords:
RNA helicaseRNA structuremeiosistranslation timing

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Defining the Program of Maternal mRNA Translation during In vitro Maturation using a Single Oocyte Reporter Assay
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Area of Science:

  • Molecular Biology
  • Genetics
  • Cell Biology

Background:

  • mRNA structure influences translation efficiency but its role in complex processes like meiosis is unclear.
  • Yeast meiosis presents a unique model to study dynamic post-transcriptional regulation due to limited transcription.

Purpose of the Study:

  • To investigate the role of mRNA structure in coordinating translation during yeast meiosis.
  • To understand how RNA helicases modulate mRNA structure and translational control.

Main Methods:

  • High-resolution profiling of mRNA structures (structurome) across multiple time points during yeast meiosis.
  • Quantification of mRNA structures for over 2,000 annotated mRNAs.
  • Analysis of RNA helicase (Ded1p) levels and their impact on mRNA structure and translation.

Main Results:

  • Meiotic transcripts generally exhibit flexible structures that enhance translation.
  • Complex mRNA structures impede translation by reducing ribosome flux and promoting alternative initiation.
  • Dynamic oscillations in RNA helicase levels reprogram cell-wide translational preferences based on RNA structure.
  • Disruption of specific mRNA structures or helicase levels impairs meiotic proteostasis and progression.

Conclusions:

  • Concerted action of mRNA structure and RNA helicases orchestrates cell-wide translation dynamics during meiosis.
  • This highlights a crucial post-transcriptional regulatory mechanism active when transcription is limited by chromosome condensation.
  • The findings reveal a sophisticated layer of gene expression control essential for successful meiosis.