関連する実験動画
Updated: Aug 7, 2026

09:05
MicroRNA-based Regulation of Picornavirus Tropism
Published on: February 6, 2017
まとめ
ポリオウイルスとピコルナウイルスの粒子は,カプシドタンパク質に共振的に結合した脂肪酸であるミリスティック酸で改変されます. このミリスチル化は,ウイルスの集合と細胞への侵入に影響を与える可能性があります.
科学分野:
- ウイルス学 ウイルス学 ウイルス学
- 構造生物学 構造生物学とは
- バイオケミストリー バイオケミストリー
背景:
- ポリオウイルスを含むピコルナウイルスは,ヒトの重要な病原体です.
- ウイルスのカプシドタンパク質は,ウイルスの構造と機能において重要な役割を果たします.
- 翻訳後の改変は,タンパク質の機能と局所化を変化させる可能性があります.
研究 の 目的:
- ポリオウイルスおよび他のピコルナウイルス粒子の特定の改変を調査する.
- ウイルスの構造内のこれらの改変の位置と性質を決定する.
- これらの改変の潜在的機能的影響を調査する.
主な方法:
- ミリスティック酸のウイルスカプシドタンパク質への共性結合分析.
- ポリオウイルス粒子の高解像度電子密度マッピング.
- 他のミリスチル化タンパク質との比較分析.
主要な成果:
- ピコルナウイルスのカプシドタンパク質にミリスティック酸の特定の共性結合の証拠を取得した.
- 電子密度マップは,ポリオウイルス粒子内のミリスタート分子の正確な位置を確認しました.
- これらのウイルスの特定の改変として,ミリスチレーションを特定しました.
結論:
- ミリスティック酸は,ポリオウイルスや他のピコルナウイルスにおけるカプシドタンパク質に共性結合している.
- ミリスタート分子は,ウイルス粒子の内部に正確に位置しています.
- ミリスチル化は,ピコルナウイルスのカプシド集合または細胞への侵入に役割を果たす可能性があります.
関連する概念動画
Viral Structure
Viruses are extraordinarily diverse in shape and size, but they all have several structural features in common. All viruses have a core that contains a DNA- or RNA-based genome. The core is surrounded by a protective coat of proteins called the capsid. The capsid is composed of subunits called capsomeres. The capsid and genome-containing core are together known as the nucleocapsid.
Protein Complex Assembly
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types. Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Structural Protein Function
Structural proteins are a category of proteins responsible for functions ranging from cell shape and movement to providing support to major structures such as bones, cartilage, hair, and muscles. This group includes proteins such as collagen, actin, myosin, and keratin.
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to form...
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to form...
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...
Structural Protein Function
Structural proteins are a category of proteins responsible for functions ranging from cell shape and movement to providing support to major structures such as bones, cartilage, hair, and muscles. This group includes proteins such as collagen, actin, myosin, and keratin.
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to form...
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to form...
Inhibitors of Virion Maturation and Assembly
As part of their replication cycle, certain viruses synthesize long precursor proteins called polyproteins within infected host cells. In human immunodeficiency virus (HIV), two major polyproteins are produced: Gag and Gag-Pol. The Gag polyprotein supplies the structural components of the virus, while Gag-Pol includes essential viral enzymes such as reverse transcriptase, integrase, and protease. After synthesis, these polyproteins move to the host cell membrane, where they assemble into an...

