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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...
34.4K
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...
143.0K
Termination of Translation01:44

Termination of Translation

25.7K
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...
15.9K
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...
5.2K
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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関連する実験動画

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

18.4K

段階分離でトランスレーションを起動する

Anne Ramat1, Martine Simonelig1

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

Science (New York, N.Y.)
|August 11, 2022
PubMed
まとめ
この要約は機械生成です。

リボ核タンパク質の粒子は,マウスの精子生成を完了させる重要なプロセスであるトランスレーションの活性化に不可欠です. この発見は,男性生殖細胞の発達におけるこれらの粒子の役割を強調しています.

さらに関連する動画

Xenopus laevis as a Model to Identify Translation Impairment
10:24

Xenopus laevis as a Model to Identify Translation Impairment

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10.8K
Defining the Program of Maternal mRNA Translation during In vitro Maturation using a Single Oocyte Reporter Assay
08:00

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

Published on: June 16, 2021

4.4K

関連する実験動画

Last 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

18.4K
Xenopus laevis as a Model to Identify Translation Impairment
10:24

Xenopus laevis as a Model to Identify Translation Impairment

Published on: September 27, 2015

10.8K
Defining the Program of Maternal mRNA Translation during In vitro Maturation using a Single Oocyte Reporter Assay
08:00

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

Published on: June 16, 2021

4.4K

科学分野:

  • 細胞生物学
  • 生殖生物学
  • 分子遺伝学

背景:

  • リボ核タンパク質粒子は,転写後の遺伝子調節に関与するダイナミックな細胞構造である.
  • 精子生成は精密な遺伝子発現制御を必要とする 男性のゲメット形成の複雑なプロセスです

研究 の 目的:

  • マウスの精子生成過程におけるリボヌクレオプロテインの作用を調査する.
  • これらの粒子が男性の生殖細胞の 発達にどのように貢献するかを決定する.

主な方法:

  • マウスの丸でリボヌクレオプロテインの粒子を視覚化するために,高度な顕微鏡技術を使用しました.
  • これらの粒子のトランスレーション活性を評価するために分子生物学的測定法を使用します.
  • 精子形成の異なる段階における遺伝子発現パターンを分析した.

主要な成果:

  • リボヌクレオプロテインの粒子は,発育中の精子発生細胞の活性化翻訳部であることが実証された.
  • 特定されたメッセンジャーRNAとタンパク質は,これらの粒子の内部に局所され,翻訳されます.
  • 粒子の媒介による翻訳と精子生成の進行との相関を示した.

結論:

  • リボ核タンパク質の粒子は,マウスの精子生成に必要な必須タンパク質の適時かつ正確な変換を保証する上で重要な役割を果たします.
  • これらの粒子は,男性生殖細胞の成熟を促進するために,翻訳を調整する制御ハブとして機能します.
  • リボヌクレオプロテインの粒子の機能をターゲットにすることで,男性の不妊症を理解し,治療するための新しい道を開くことができます.