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Updated: Aug 17, 2026

11:48
Detection of Alternative Splicing During Epithelial-Mesenchymal Transition
Published on: October 9, 2014
まとめ
研究者らは,マウスT細胞受容体 (TCR) ベータ鎖のトランスクリプトに新しい代替RNAスプライシング経路を発見し,オプションの72塩基対エクソン挿入を明らかにしました. この発見は,免疫細胞における遺伝子発現調節の理解を広げている.
科学分野:
- 分子生物学は分子生物学である.
- 免疫学 免疫学とは
- 遺伝学 遺伝学とは
背景:
- 代替RNA処理は,単一の遺伝子から多様なメッセンジャーRNA種を生成します.
- 免疫グロブリンとT細胞受容体 (TCR) 遺伝子発現には,複雑なスプライシングイベントが含まれています.
- 以前の研究では,免疫グロブリン重鎖の代替スプライシングと変数領域発現を文書化しました.
研究 の 目的:
- ネズミのT細胞受容体 (TCR) ベータチェーントランスクリプトにおける代替RNAスプライシングを調査する.
- TCRベータ鎖の遺伝子発現における新しいスプライシングイベントを特定し,特徴づけること.
主な方法:
- TCRベータ鎖のトランスクリプトから派生した補完的なDNA (cDNA) クロンの配列解析.
- TCRベータ鎖の補完DNA内の挿入された配列の識別.
主要な成果:
- 結合 (Jβ) と定数 (Cβ) 要素の間の72塩基対 (bp) の挿入を含む新しいCβ1メッセンジャーRNA種が特定されました.
- この挿入は,Cβ1トランスクリプトに特異的な代替スプライシング経路の結果である.
- オプションのエクソンは,Cβ1遺伝子が欠けているマウスのCβ2にスプライスすることができます.
- 代替スプライシング経路の使用率は1%から18%まで変化しました.
結論:
- ネズミのT細胞受容体 (TCR) ベータ鎖のトランスクリプトには,以前未知の代替RNAスプライシング経路が存在する.
- この経路は,Cβ1トランスクリプトに72bpのオプションエクソンを導入し,TCRβ鎖の発現に複雑さを加えます.
- この発見は,TCR遺伝子発現と免疫細胞発達の制御メカニズムに関する新しい洞察を提供します.
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関連する概念動画
RNA Splicing
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
Alternative RNA Splicing
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
RNA Editing
RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or modification. The extent of RNA editing varies from a few hundred bases, in mitochondrial DNA of trypanosomes, to a just single base, in nuclear genes of mammals. Even a single base change in the pre-mRNA can convert a codon for one amino acid into the codon for another amino acid or a stop codon. This type of re-coding can significantly affect the...
Exon Recombination
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon has three reading...
Exon shuffling follows “splice frame rules.” Each exon has three reading...
RACE - Rapid Amplification of cDNA Ends
Rapid Amplification of cDNA Ends, or RACE, is one of the most effective methods to obtain a full-length cDNA from an mRNA sequence between a known internal region to the unknown sequence at the 5’ or 3’ end. The unknown region is cloned in the cDNA by a gene-specific primer that binds the known end, and a hybrid primer that attaches a predefined anchor sequence to the unknown end of the cDNA. The sequence in between is amplified by PCR with an anchor primer and a gene-specific primer.
Since the...
Since the...

