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Related Concept Videos

Initiation of Translation02:33

Initiation of Translation

34.4K
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...
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Translation01:31

Translation

143.0K
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.
Translation Produces the Building Blocks of...
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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...
25.7K
Transcription Attenuation in Prokaryotes02:42

Transcription Attenuation in Prokaryotes

15.9K
Transcriptional attenuation occurs when RNA transcription is prematurely terminated due to the formation of a terminator mRNA hairpin structure.  Bacteria use these hairpins to regulate the transcription process and control the synthesis of several amino acids including histidine, lysine, threonine, and phenylalanine. Transcription attenuation takes place in the non-coding regions of mRNA.
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
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Leaky Scanning02:28

Leaky Scanning

5.2K
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA.  Marilyn Kozak discovered that the sequence RCCAUGG (where R...
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Translation in Prokaryotes01:29

Translation in Prokaryotes

131
Prokaryote translation is a complex, highly coordinated process that converts genetic information from mRNA into functional proteins. It involves three stages: initiation, elongation, and termination, each facilitated by specific molecular components.Initiation of TranslationThe process begins with the assembly of the ribosomal subunits and initiation factors on the mRNA. In bacteria, the 30S ribosomal subunit recognizes the Shine-Dalgarno sequence in the mRNA, a conserved region upstream of...
131

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Related Experiment Video

Updated: Sep 1, 2025

Analysis of Translation Initiation During Stress Conditions by Polysome Profiling
10:59

Analysis of Translation Initiation During Stress Conditions by Polysome Profiling

Published on: May 19, 2014

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Activating translation with phase separation.

Anne Ramat1, Martine Simonelig1

  • 1Institute of Human Genetics, Université Montpellier, CNRS, Montpellier, France.

Science (New York, N.Y.)
|August 11, 2022
PubMed
Summary
This summary is machine-generated.

Ribonucleoprotein granules are essential for activating translation, a key process that enables the completion of mouse spermatogenesis. This finding highlights the role of these granules in male reproductive cell development.

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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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Related Experiment Videos

Last Updated: Sep 1, 2025

Analysis of Translation Initiation During Stress Conditions by Polysome Profiling
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Area of Science:

  • Cell Biology
  • Reproductive Biology
  • Molecular Genetics

Background:

  • Ribonucleoprotein granules are dynamic cellular structures involved in post-transcriptional gene regulation.
  • Spermatogenesis is a complex process of male gamete formation requiring precise gene expression control.

Purpose of the Study:

  • To investigate the role of ribonucleoprotein granules in regulating translation during mouse spermatogenesis.
  • To determine how these granules contribute to the successful completion of male germ cell development.

Main Methods:

  • Utilized advanced microscopy techniques to visualize ribonucleoprotein granules in mouse testes.
  • Employed molecular biology assays to assess translational activity within these granules.
  • Analyzed gene expression patterns during different stages of spermatogenesis.

Main Results:

  • Demonstrated that ribonucleoprotein granules are sites of activated translation in developing spermatogenic cells.
  • Identified specific messenger RNAs and proteins localized and translated within these granules.
  • Showed a correlation between granule-mediated translation and the progression of spermatogenesis.

Conclusions:

  • Ribonucleoprotein granules play a critical role in ensuring the timely and accurate translation of essential proteins required for mouse spermatogenesis.
  • These granules act as regulatory hubs, coordinating translation to facilitate male germ cell maturation.
  • Targeting ribonucleoprotein granule function may offer new avenues for understanding and treating male infertility.