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Updated: May 8, 2026

08:35
Identification of Alternative Splicing and Polyadenylation in RNA-seq Data
Published on: June 24, 2021
イーストとヒトにおける総合的なポリアデニレーションサイトマップは,広範囲にわたる代替ポリアデニレーションを明らかにしています
Fatih Ozsolak1, Philipp Kapranov, Sylvain Foissac
1Helicos BioSciences Corporation, Cambridge, MA 02139, USA. fatihozsolak@gmail.com
Cell
|December 15, 2010
まとめ
直接RNA配列解析は,ヒトと酵母における全ゲノムにわたる包括的なポリアデニレーションマップを明らかにしています. この研究は,多数の注釈されていないポリアデニレーション部位と代替パターンを特定し,遺伝子調節と病気の理解を深める.
科学分野:
- 分子生物学は分子生物学である.
- ゲノミクスゲノミクスとは
- RNA 生物学 RNA 生物学
背景:
- ポリアデニレーションはRNAの安定性と翻訳に不可欠です.
- ポリアデニレーションの調節不良は,様々な人間の病気と関連しています.
- ゲノム全体のポリアデニレーション状態の包括的な特徴化は必要である.
研究 の 目的:
- ヒトと酵母菌における世界的なポリアデニレーションイベントの高解像度,定量的な地図を作成する.
- アノテーションなしのポリアデニレーション部位と代替ポリアデニレーションパターンを特定する.
- ポリアデニレーション,配列組成,重複転写の間の関係を調査する.
主な方法:
- 精製された直接RNAシーケンシング技術で,鎖特異的な定量分析を行う.
- ヒトと酵母におけるポリアデニレーションプロフィールの解析.アトモールRNAの量.
主要な成果:
- 数多くの注釈されていないポリアデニレーション部位と代替ポリアデニレーションパターンの発見.
- ヒトのポリアデニレーション部位周辺の配列組成の違いを特定し,新たなメカニズムを示唆した.
- 感覚と反感覚のトランスクリプトレベルと遺伝子発現の間の相関関係,重複するトランスクリプトの規制的な役割を示す.
結論:
- 直接RNAシーケンシングは,包括的なポリアデニレーションマッピングのための強力なツールを提供します.
- この発見は,RNAの調節,非コーディングRNAのポリアデニレーション,および重複転写に関する新しい洞察を明らかにしています.
- この研究は,遺伝子発現と潜在的な疾患関連におけるポリアデニレーションの役割の理解を前進させています.
関連する概念動画
Chromatin Structure Regulates pre-mRNA Processing
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...
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 Editing
RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or modification. The extent of RNA editing varies from a few hundred bases, in mitochondrial DNA of trypanosomes, to a just single base, in nuclear genes of mammals. Even a single base change in the pre-mRNA can convert a codon for one amino acid into the codon for another amino acid or a stop codon. This type of re-coding can significantly affect the...
Leaky Scanning
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R stands for...
Pre-mRNA Processing: Modification of pre-mRNA Ends
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 (7-methyl guanosine). This 5' cap helps the cell...
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 (7-methyl guanosine). This 5' cap helps the cell...
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...

