ユカリアのtRNAスプライシングエンドヌクレアゼは,RNA要素の三部分のセットを認識する
E Di Nicola Negri1, S Fabbri, E Bufardeci
1Institute of Cell Biology, CNR, Rome, Italy.
Cell
|June 13, 1997
まとめ
tRNAスプライシングエンドヌクレアゼは,認識のためにイントロンの内の新しい構造要素を使用し,以前の信念に挑戦します. この発見は,eukaryotic tRNA splicingの2つの活性サイトモデルをサポートしています.
科学分野:
- 分子生物学は分子生物学である.
- バイオケミストリー バイオケミストリー
- RNA 処理 RNA 処理
背景:
- 転送RNA (tRNA) スプライシングは,重要な転写後の改変プロセスです.
- tRNAスプライシングエンドヌクレアゼは,tRNA前駆体をイントロン-エクソン境界で分裂させる責任を負う.
- 以前のモデルは,成熟したtRNAドメインを通してのみエンドヌクレアスの認識を提案していた.
研究 の 目的:
- 基板認識のためにtRNAスプライシングエンドヌクレアースによって利用される構造要素を調査する.
- エンドヌクレアース結合の支配的なモデルに異議を唱え,新しい認識部位を特定する.
主な方法:
- エンドヌクレアゼによるtRNA前駆体認識に関与する構造要素の分析.
- 認識プロセスにおける内定化された要素の役割を調査する.
主要な成果:
- エンドヌクレアゼは,イントロン内のものを含む,異なる構造要素を使用してtRNA前駆者を認識します.
- 成熟ドメインの要素のサブセットは,両方の割れ目を認識します.
- エクソン・イントロンの境界にある分離した元素は,個々の分裂部位を認識し,その独立性を示す.
結論:
- エンドヌクレアース認識の支配的なモデルは不完全であり,イントロン由来の要素が不可欠である.
- この発見は,真核のtRNAスプライシングエンドヌクレアゼの2つの活性部位モデルを支持する.
- この改訂された理解は,tRNAの成熟と遺伝子発現の調節の理解に影響を与える.
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...
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...
Transfer RNA Synthesis
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Each of these chemical modifications is carried by a specific enzyme, post-transcription. All of these enzymes have unique base and site-specificity. Methylation, the most common chemical modification, is carried by at least nine different enzymes, with...
Each of these chemical modifications is carried by a specific enzyme, post-transcription. All of these enzymes have unique base and site-specificity. Methylation, the most common chemical modification, is carried by at least nine different enzymes, with...
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...


