関連する実験動画
Updated: May 11, 2026

08:48
Complementation of Splicing Activity by a Galectin-3 - U1 snRNP Complex on Beads
Published on: December 9, 2020
ネモトード前伝達 RNA のトランススプライシング in vitro
G J Hannon1, P A Maroney, J A Denker
1Department of Molecular Biology and Microbiology, Case Western Reserve University, School of Medicine, Cleveland, Ohio 44106.
Cell
|June 29, 1990
まとめ
ネマトード・トランス・スプライシングは,mRNAsに共通のスプライスされたリーダー (SL) 配列を追加します. Ascaris lumbricoidesの胚抽出物は,このプロセスをY分岐の中間体によって効率的に触媒化する.
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
- 寄生虫学とは,寄生虫学である.
背景:
- 多くのネモトードmRNAは,保存された22核性otide spliced leader (SL) 配列を特徴としています.
- このSL配列は,トランススプライシングと呼ばれるプロセスを通して生成されます.
研究 の 目的:
- ネマトードにおけるSL添加のメカニズムを調査する.
- 細胞フリー抽出物が正確なSL添加を触媒化できるかどうかを判断する.
- トランススプライシング反応の分岐点を特定するために.
主な方法:
- アスカリス・ルンブリコイドス (Ascaris lumbricoides) の細胞のない抽出物から胚を培養する.
- 抽出物を合成プレ-mRNA基板でインキュベーションする.
- トランススプライシング反応産物および中間物質の分析.
主要な成果:
- 細胞のない抽出物は,合成のプレ-mRNAへのSL添加を正確かつ効率的に触媒化しました.
- トランススプライシング反応は,Y分岐の中間体を通過した.
- ブランチポイントは,2つのアデノシン残留物,18および19の核酸で,スプライス受容体の場所から上流に特定されました.
結論:
- Ascaris lumbricoidesの胚からの細胞のないシステムは,正確なトランススプライシングを繰り返すことができます.
- この研究では,ネマトードにおけるSL添加の鍵となるメカニズム的な詳細を明らかにした.
- 特定されたブランチポイントの位置は,トランススプライシング機械の洞察を提供します.
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...
pre-mRNA Processing
In eukaryotic cells, transcripts made by RNA polymerase are modified and processed before exiting the nucleus. Unprocessed RNA is called precursor mRNA or pre-mRNA to distinguish it from mature mRNA.
Once about 20-40 ribonucleotides have been joined together by RNA polymerase, a group of enzymes adds a “cap” to the 5’ end of the growing transcript. In this process, a 5’ phosphate is replaced by modified guanosine that has a methyl group attached to it (7-Methyl guanosine). This 5’ cap helps the...
Once about 20-40 ribonucleotides have been joined together by RNA polymerase, a group of enzymes adds a “cap” to the 5’ end of the growing transcript. In this process, a 5’ phosphate is replaced by modified guanosine that has a methyl group attached to it (7-Methyl guanosine). This 5’ cap helps the...
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...
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...
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...

