関連する実験動画
Updated: Aug 7, 2026

08:11
Quantitative Analysis of Chromatin Proteomes in Disease
Published on: December 28, 2012
サブトラクティブ・プロテオミクスによって発見された潜在的疾患関連性を持つ核膜タンパク質
Eric C Schirmer1, Laurence Florens, Tinglu Guan
1Department of Cell Biology, Scripps Research Institute, La Jolla, CA 92037, USA.
まとめ
研究者らは,核包膜 (NE) に67種類の新しい統合膜タンパク質を特定し,既知のタンパク質レパートリーを大幅に拡大しました. この発見は,以前に特徴づけられていなかったNEタンパク質と,様々なジストロフィーを結びつける可能性がある.
科学分野:
- 細胞生物学 細胞生物学
- プロテオミクス プロテオミクスは,プロテオミクスの
- 遺伝学 遺伝学とは
背景:
- 核膜 (NE) は,細胞の重要な構造である.
- NEの統合膜タンパク質は,その機能に不可欠です.
- 以前の同定の努力は限られていた.
研究 の 目的:
- 核封筒の統合膜タンパク質を包括的に特定する.
- 新種のNEタンパク質とその潜在的な役割を発見する.
主な方法:
- 肝臓から核封筒 (NEs) とコフラクチャートオーガネルの準備.
- タンパク質検出のための多次元タンパク質識別技術 (MudPIT).
- NEタンパク質データセットを精製するために,同分化器官からタンパク質を引く.
主要な成果:
- 既知の13のNE統合タンパク質をすべて特定しました.
- 予測された膜を横断する領域を持つ67の未定の開いた読書フレームを発見した.
- 実験的検証は,すべての試験された新しいタンパク質に対するNEターゲティングを確認した.
結論:
- NEには,以前に認識されたものよりも実質的に多くの統合タンパク質が含まれています.
- 新しく特定されたNEタンパク質の有意な数は,染色体領域にマップされ,ダイストロフィー症に関連しています.
- これらの発見は,NEの機能と疾患の病原性を理解するための新しい道を開きます.
関連する概念動画
Protein Networks
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These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
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Proteins targeted to the nucleus carry nuclear localization signals or NLS recognized by import receptors in the cytosol. Similarly, proteins with nuclear export signals are recognized by export receptors. Import and export receptors are...
Proteins targeted to the nucleus carry nuclear localization signals or NLS recognized by import receptors in the cytosol. Similarly, proteins with nuclear export signals are recognized by export receptors. Import and export receptors are...
Nuclear Localization Signals and Import
Proteins targeted to the nucleus carry short stretches of amino acid sequences called the nuclear localization signal or NLS. Classical nuclear localization signals are of two types: monopartite and bipartite NLS. Monopartite classical NLS (cNLS) consists of a single cluster of 4-8 amino acids. Bipartite cNLS consists of two clusters of 2-3 amino acids and a 9-12 residue long proline-rich linker bridging the two clusters. Signal clusters are rich in positively charged amino acids such as...
Nuclear Export
The nucleus restricts several proteins within and allows others to pass. The restricted proteins possess a nuclear retention sequence or NRS, anchoring them to the nuclear lamins and preventing their transport to the cytosol. The non-restricted proteins, after their synthesis, are transported to their site of action, such as the cytosol or other organelles, with the help of nuclear export signals or NES.
NES are of three types- the canonical 10-residue long leucine-rich signal and other...
NES are of three types- the canonical 10-residue long leucine-rich signal and other...
Regulation of Nuclear Protein Sorting
Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...
Proteomics
A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...

