自动分配内在无序的蛋白质Tau与441残留物
Rhagavendran L Narayanan1, Ulrich H N Dürr, Stefan Bibow
1Department of NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Goettingen, Germany.
Journal of the American Chemical Society
|August 7, 2010
概括
由于信号重叠,特征化像Tau这样的内在无序蛋白质具有挑战性. 这项研究使用先进的NMR方法高效地分配Tau蛋白结构和动态,揭示了全球折叠的证据.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 神经科学是一个神经科学.
背景情况:
- 内在无序蛋白 (IDP) 对于细胞功能至关重要,但由于缺乏固定的结构,很难研究.
- 在NMR光谱中的信号重叠使IDP的结构和动态表征复杂化.
- 蛋白及其异构体是阿尔茨海默病的关键,是内心流离失所者.
研究的目的:
- 开发和应用一种高效的基于NMR的方法,用于对陶蛋白及其异型的共振分配.
- 研究溶液中陶蛋白的结构性质和动态.
- 提供对全球淘的折叠的洞察力.
主要方法:
- 使用了七维NMR光谱学.
- 采用了针对自动共振分配的优化方法.
- 分析了三种tau异型:全长tau (441个残留物),htau24 (383个残留物) 和htau23 (352个残留物).
主要成果:
- 在5天内实现了Tau及其异构体的共振分配.
- 观察到异构体之间存在显著的化学转移差异.
- 这些差异为溶液中Tau的全球折叠提供了证据.
结论:
- 开发的NMR方法可以快速有效地表征像Tau这样的国内流离失所者.
- 这些发现表明,在溶液中表现出全球折叠,尽管它是一种内在无序的蛋白质.
- 这项工作促进了对陶氏结构和动态的理解,这与阿尔茨海默病研究有关.
相关概念视频
Intrinsically Disordered Proteins
Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...
Intrinsically Disordered Proteins
Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...
Tail-anchoring of Proteins in the ER Membrane
Tail-anchored, or TA, proteins are estimated to make up to 3-5% of membrane proteins found in the eukaryotic cell. Such proteins have a single transmembrane domain located approximately 30 amino acid residues upstream from the C-terminal end. As a result, the signal recognition particle (SRP) cannot guide a TA protein to the ER membrane for cotranslational insertion. Hence, they are integrated into the ER membrane post-translationally using their C-terminal end as the anchor. TA proteins...
Translocation of Proteins into the Mitochondria
Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
Protein Folding
Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Protein Folding
Overview


