cDNAクローンのトランスクリプトからVSVの感染性欠陥干渉粒子を検出
A K Pattnaik1, L A Ball, A W LeGrone
1Department of Microbiology, University of Alabama Medical School, Birmingham 35294.
Cell
|June 12, 1992
まとめ
研究者らは,cDNAクローンから膀性口腔炎ウイルス (VSV) の感染性欠陥干渉 (DI) 粒子を生成した. この新しい方法は,ヘルパーVSVの必要性を回避し,効率的なウイルス粒子の生成と複製の研究を可能にします.
科学分野:
- ウイルス学 ウイルス学 ウイルス学
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- 欠陥干渉粒子 (DI) は,ウイルスの複製と進化を理解するために不可欠です.
- DI粒子を生成する以前の方法は,ヘルパーウイルスを必要とし,実験制御を制限していました.
- 膀性口炎ウイルス (VSV) は,負鎖RNAウイルスを研究するためのモデルシステムです.
研究 の 目的:
- VSVの感染性DI粒子を完全にcDNAクローンから生成する方法を開発する.
- この方法はヘルパーVSVを必要としないことを示すために.
- DI粒子の高レベルの複製と生化学分析のためのシステムを確立する.
主な方法:
- バクテリオファージT7RNAポリメラーゼを用いたVSV DIRNAcDNAクローンから完全なネガティブ鎖のゲノムRNAを転写する.
- 宿主細胞内の独立したcDNAクローンから5つのVSVタンパク質を共発する.
- 肝炎デルタウイルスのリボエンザイムを使用して,トランスクリプトの正確な3'エンド生成を行う.
- DI粒子の封じ込め,複製,組み立て,芽生えは,ヘルパーウイルスなしで行われます.
主要な成果:
- cDNAクローンからのみVSVの感染性DI粒子を生成しました.
- ヘルパーVSV.を必要とせずにDI粒子の高レベルの複製が実証されています.
- 効率的な複製のための正確な3'端末の重要な役割を確認しました.
結論:
- この研究は,cDNAから感染性VSV DI粒子を生成するための新しい,ヘルパー独立の方法を提示しています.
- 開発されたシステムは,DI粒子の複製と組み立てに関する制御された研究を可能にします.
- このアプローチは,ウイルス学研究,ワクチン開発,遺伝子治療ベクトル設計に重大な意味を持っています.
関連する概念動画
siRNA - Small Interfering RNAs
18.6K
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
18.6K
Reproductive Cloning
32.7K
Reproductive cloning is the process of producing a genetically identical copy—a clone—of an entire organism. While clones can be produced by splitting an early embryo—similar to what happens naturally with identical twins—cloning of adult animals is usually done by a process called somatic cell nuclear transfer (SCNT).
Somatic Cell Nuclear Transfer
In SCNT, an egg cell is taken from an animal and its nucleus is removed, creating an enucleated egg. Then a somatic...
Somatic Cell Nuclear Transfer
In SCNT, an egg cell is taken from an animal and its nucleus is removed, creating an enucleated egg. Then a somatic...
32.7K
Transcription
156.3K
Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
156.3K
Small interfering RNAs (siRNA)
4.6K
No description available
4.6K
Transcription Factors
82.7K
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
82.7K
RACE - Rapid Amplification of cDNA Ends
7.3K
Rapid Amplification of cDNA Ends, or RACE, is one of the most effective methods to obtain a full-length cDNA from an mRNA sequence between a known internal region to the unknown sequence at the 5’ or 3’ end. The unknown region is cloned in the cDNA by a gene-specific primer that binds the known end, and a hybrid primer that attaches a predefined anchor sequence to the unknown end of the cDNA. The sequence in between is amplified by PCR with an anchor primer and a gene-specific...
7.3K


