関連する実験動画
Updated: Feb 21, 2026

10:25
Using the E1A Minigene Tool to Study mRNA Splicing Changes
Published on: April 22, 2021
5.5K
SCNα遺伝子ファミリーの祖先のイントロニックスプライシングの規制要素
Ekaterina Chernyavskaya1, Margarita Vorobeva2, Sergei A Spirin2
1Center for Molecular and Cellular Biology.
まとめ
進化的分析は,電圧誘導ナトリウムチャネルアルファ (SCNα) 遺伝子のエクソン5重複が,この遺伝子ファミリーより前のものであることを明らかにしている. 保存された規制要素は,相互排他的エクソン5aおよびエクソン5bの代替スプライシングを制御する.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- 進化生物学の進化生物学について
背景:
- SCNα遺伝子によってコードされた電圧ゲートナトリウムチャネルは,電気信号伝送に不可欠です.
- 人間のSCNα遺伝子は,相互排他的エクソン5aと5bを含み,チャネル機能に影響を与える.
- これらの代替エクソンの進化的起源と規制メカニズムは不明のままである.
研究 の 目的:
- SCNαエクソン5複製の進化史を調査する.
- 相互排他的エクソン5aとエクソン5bのスプライシングパターンを特徴づける.
- エクソン5bの代替スプライシングを規制する規制メカニズムを明らかにする.
主な方法:
- 進化の歴史を再構築するために,種間の比較シーケンス分析.
- 様々な組織,腫瘍,および発達段階におけるスプライシングパターンの特徴化.
- ミニゲン突然変異,アンチセンスオリゴヌクレオチド阻害,siRNA媒介ノックダウンで,スプライシングの調節を研究する.
主要な成果:
- SCNα遺伝子のエクソン5複製は古くから存在し,遺伝子ファミリーの多様化以前から発生しています.
- 無意味な媒介による衰退 (NMD) システムは,相互排他的なスプライシングの主要な原動力ではありません.
- 保存された内部結合調節要素 (ISRE) とRbfox2結合部位は,RNA構造形成を通じてエクソン5b結合を調節する.
結論:
- SCNαエクソン5の複製は,古代の進化の出来事である.
- エクソン5aと5bの代替スプライシングは,保存されたRNA構造要素とRbfox2.2によって調節されます.
- 比較配列分析は,遺伝子ファミリーの進化とスプライシングの調節を理解するための強力なツールです.
関連する概念動画
Alternative RNA Splicing
25.4K
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...
25.4K
Alternative RNA Splicing
5.2K
5.2K
RNA Splicing
60.8K
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...
60.8K
Chromatin Structure Regulates pre-mRNA Processing
8.3K
In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...
The chromatin structure, especially...
8.3K
Inheritance of Chromatin Structures
7.7K
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
7.7K
Cis-regulatory Sequences
12.0K
Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
12.0K

