関連する実験動画
Updated: Jul 25, 2026
10:55
Rescue of Recombinant Newcastle Disease Virus from cDNA
Published on: October 11, 2013
まとめ
研究者らは,仙台ウイルスのPおよびCタンパク質遺伝子をウイルスゲノムで特定した. 配列解析により,重複する遺伝子が明らかになり,インフルエンザのようなウイルスとの進化的関連が示唆された.
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:
- 仙台ウイルスは,分割されたRNAゲノムを持つパラミキソウイルスです.
- ウイルスの遺伝子組織を理解することは,ウイルスの複製と進化を研究するために不可欠です.
研究 の 目的:
- センダイウイルスのPおよびCタンパク質をコードするメッセンジャーRNA (mRNA) の位置と特徴を特定する.
- これらのウイルス遺伝子の遺伝的組織と潜在的な進化的起源を解明する.
主な方法:
- クローンDNAは,PおよびCタンパク質をコードするウイルスゲノム領域を特定するために使用されました.
- 核酸配列解析は,関連するDNA領域で行われました.
- mRNAトランスクリプトの分析には,プライマー拡張とS1ヌクレアースマッピングを使用した.
- 翻訳実験のハイブリッド停止は,制限断片を用いて行われました.
主要な成果:
- 568アミノ酸と204アミノ酸のタンパク質をコードできる2つの重複するオープンリーディングフレーム (ORF) が特定されました.
- このゲノム領域から1,894kbの単一のmRNAトランスクリプトが検出されました.
- 翻訳研究のハイブリッドアスタストは,PとC遺伝子の重複する性質を確認しました.
- 配列のホモロジーは,これらの遺伝子が共通の祖先から進化した可能性があることを示唆し,インフルエンザのようなウイルスに潜在的に関連しています.
結論:
- 仙台ウイルスのPおよびCタンパク質は,単一のmRNAに重複する遺伝子がコード化されています.
- この発見は,仙台ウイルスの遺伝子構造についての洞察を提供します.
- シーケンスホモロジーは,インフルエンザのようなウイルスとの進化的関係の可能性を示唆し,遺伝子の複製イベントを潜在的に含む.
関連する概念動画
01:31Translation
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
02:33Initiation of Translation
Initiating translation is complex because it involves multiple molecules. Initiator tRNA, ribosomal subunits, and eukaryotic initiation factors (eIFs) are all required to assemble on the initiation codon of mRNA. This process consists of several steps that are mediated by different eIFs.
First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...
First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...
02:28Leaky 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...
01:31Translation
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
01:25Nucleic Acid Structure
The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms a 5′ to 3′ phosphodiester linkage.
DNA Structure
DNA has a double-helix structure. The...
DNA Structure
DNA has a double-helix structure. The...
01:29Viruses with RNA Genomes
RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...