pre-mRNA splicing in vitroのプラスのコントロールをインビトロで行いました
1Department of Biochemistry and Molecular Biology, Harvard University, Cambridge, MA 02138.
まとめ
トランスフォーマー (tra) とトランスフォーマー2 (tra-2) 遺伝子は,ドロソフィラの性別スペライシングを制御する. エクソン上のタンパク質複合体を促進し,女性の発達のためのスプライスサイト認識を促進します.
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
- 発達生物学 発達生物学とは
背景:
- 代替スプライシングは遺伝子発現を調節し,性差異化に不可欠です.
- ダブルセックス (dsx) 遺伝子の代替スプライシングは,Drosophila melanogaster.の性発達の鍵である.
- トランスフォーマー (tra) とトランスフォーマー-2 (tra-2) タンパク質は,DSXスプライシングのレギュレータとして知られています.
研究 の 目的:
- トランスフォーマー (tra) とトランスフォーマー-2 (tra-2) がダブルセックス (dsx) プレ-mRNAの女性特有の3'スプライス部位を活性化するインビトロメカニズムを調査する.
- この性特異的な代替スプライシングイベントに関与する規制要素とタンパク質の相互作用を特定する.
主な方法:
- dsxプリ-mRNA処理を研究するために,in vitroスプライシングシステムを使用しました.
- 再結合型トランスフォーマー (Tra) とトランスフォーマー-2 (Tra-2) のタンパク質は,女性特有の3'スプライス部位を活性化するために使用されました.
- 電気浮遊性移動シフトアッセイ (EMSA) は,規制性エクソン配列へのタンパク質結合を検出するために実施されました.
主要な成果:
- エクソン配列は,インビヴォにおいて不可欠であり,女性特有の3'スプライス部位の活性化に必要で十分であることが判明した.
- 再結合されたTraおよびTra-2タンパク質は,in vitroシステムにおけるスプライス部位を活性化することが可能である.
- Tra と Tra-2 を含む核タンパク質が規制性エクソン配列に特異的に結合することが示されました.
結論:
- TraとTra-2は,dsxプレ-mRNAの特定のエクソン配列にマルチタンパク質複合体の組み立てを促進することによって機能する可能性が高い.
- このマルチタンパク質複合体は,接着する女性特異の3'スプライス部位をスプライス機によって認識することを強化する可能性があります.
- この発見は,ドロソフィラの性別の代替スプライシングの調節に関するメカニズム的な洞察を提供します.
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...


