関連する実験動画
Updated: May 15, 2026

11:48
Detection of Alternative Splicing During Epithelial-Mesenchymal Transition
Published on: October 9, 2014
脊椎動物種における代替スプライシングの進化的風景
Nuno L Barbosa-Morais1, Manuel Irimia, Qun Pan
1Banting and Best Department of Medical Research, Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.
まとめ
種間の現象的差異は,遺伝子だけでなく,代替的なスプライシングの複雑性から生じる. スプライシングパターンは,似たような臓器の間でさえも,急速に分岐し,脊椎動物の進化におけるその役割を強調する.
科学分野:
- 進化生物学の進化生物学について
- ゲノミクスゲノミクスとは
- 分子生物学は分子生物学である.
背景:
- 種は,似たようなタンパク質をコードする遺伝子を所持しているにもかかわらず,有意な現象的差異を示す.
- これらの現象的差異を誘発するメカニズムを理解することは,進化論の研究において極めて重要です.
研究 の 目的:
- 脊椎動物種間のフェノタイプの多様化における代替スプライシングの複雑性の役割を調査する.
- 進化の時間における臓器組織におけるトランスクリプトミックの違いを分析する.
主な方法:
- 様々な脊椎動物種の臓器トランスクリプトームの比較分析.
- 進化の系統全体における代替スプライシングの複雑性とパターンの評価.
- シスおよびトランス作用のスプライシング調節機構の特定.
主要な成果:
- 脊椎動物の系統の間では,代替スプライシングの複雑性の有意な変動が観察され,霊長類は最も高い複雑性を表しています.
- 臓器のトランスクリプトームは (600万年以内に) 急速に分岐し,臓器のタイプよりも種のアイデンティティを反映した.
- ほとんどの種特有のスプライシングパターンはシス方向であったが,いくつかのトランス作用の規制変化が特定された.
結論:
- 代替スプライシングの複雑さは,脊椎動物の種間のフェノタイプ差異の主要な要因である.
- スプライシングプロファイルの急速な分岐は,種特有の特徴に大きく寄与する.
- トランス作用因子を含むスプライシングの規制は,進化の多様化において重要な役割を果たします.
関連する概念動画
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...
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 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...
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...
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...
Pre-mRNA Processing: 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...
