β-amyloid (12-28) TFA 是 β-淀粉样蛋白 (β1-42) 的肽片段。 β1-42 是 42 个氨基酸的蛋白质,是老年斑核心的主要成分。β-amyloid (12-28) 具有聚集特性。β-amyloid (12-28) 有潜力用于阿尔茨海默氏病的研究。
编号:181342
CAS号:107015-83-8
单字母:H2N-VHHQKLVFFAEDVGSNK-OH
β-amyloid (12-28) TFA 是 β-淀粉样蛋白 (β1-42) 的肽片段。 β1-42 是 42 个氨基酸的蛋白质,是老年斑核心的主要成分。β-amyloid (12-28) 具有聚集特性。β-amyloid (12-28) 有潜力用于阿尔茨海默氏病的研究。
β-amyloid (12-28) TFA is a peptide fragment of β-amyloid protein (β1-42). β1–42 a 42 amino acid protein , is the major component of senile plaque cores. β-amyloid (12-28) shows aggregation properties. β-amyloid (12-28) has the potential for Alzheimer’s disease research.
β淀粉样蛋白(Aβ或Abeta)是由淀粉样前体蛋白加工得到的多肽,含有36-43个氨基酸。众所周知,它是与阿尔茨海默病相关的淀粉样蛋白斑的成分,研究表明,Aβ是一个高度多功能的多肽,具有显著的非病理性活性。Aβ是在阿尔茨海默病患者的脑中发现的沉积物的主要成分。阿尔茨海默病患者脑中Aβ含量升高。 Aβ是脑实质和血管淀粉样蛋白的主要成分,它有助于脑血管病变和神经毒性。
Aβ(12-28)代表载脂蛋白E(apoE)的结合位点。ApoE是阿尔茨海默病的遗传危险因素,可促进有毒aβ的聚集。该序列包含一个疏水结构域(残基14-21)和一个β-转弯(残基22-28),将aβ14至21和29至40/42这两个疏水结构区彼此相对,允许aβ肽组装成原纤维。中性肽Aß(12-28)的二级结构主要由A-螺旋和无规卷曲组成。apoE与Aß残基12至28的相互作用不仅是非特异性疏水相互作用,而且在阿尔茨海默病(AD)的Aß病理机制中起着关键作用。Aß(11-28)和其他五个片段增强了全长Aß(1-40)的聚集。所有增强聚集的肽都含有残基17至20或30至35,表明这些区域对促进全长Aß聚集的重要性。
Aβ (12-28) represents a binding site for apolipoprotein E (apoE). ApoE is a genetically inherited risk factor for Alzheimer’s disease that promotes aggregation of toxic Aβ. This sequence encompasses a hydrophobic domain (residues 14–21) and a ß-turn (residues 22–28) which place two hydrophobic domains of Aß 14 to 21 and 29 to 40/42 opposite each other, allowing for the assembly of Aß peptides into fibrils. The secondary structure of Aß (12- 28), a neutral peptide, is dominated by a-helix and random coil. The interaction of apoE with residues 12 to 28 of Aß is not just a non-specific hydrophobic interaction but plays a pivotal role in the mechanism of Aß pathology in Alzheimer’s disease (AD). Aß (11-28) and five other fragments enhanced aggregation of full length Aß (1-40). All of the peptides that enhance aggregation contained either residues 17 to 20 or 30 to 35, indicating the importance of these regions for promoting aggregation of full-length Aß.
DOI | 名称 | |
---|---|---|
10.1002/psc.418 | Structural, kinetic and cytotoxicity aspects of 12-28 beta-amyloid protein fragment: a reappraisal | 下载 |
10.1038/1565 | "Genetic dissection of Alzheimers disease and related dementias: amyloid and its relationship to tau" | 下载 |
10.1080/13506120701814723 | Potent anti-angiogenic motifs within the Alzheimer beta-amyloid peptide | 下载 |