当前位置: X-MOL 学术Chem. Phys. Lipids › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
The role of alpha-helix on the structure-targeting drug design of amyloidogenic proteins
Chemistry and Physics of Lipids ( IF 3.4 ) Pub Date : 2021-02-18 , DOI: 10.1016/j.chemphyslip.2021.105061
Carmelo Tempra 1 , Carmelo La Rosa 2 , Fabio Lolicato 3
Affiliation  

The most accredited hypothesis links the toxicity of amyloid proteins to their harmful effects on membrane integrity through the formation of prefibrillar-transient oligomers able to disrupt cell membranes. However, damage mechanisms necessarily assume a first step in which the amyloidogenic protein transfers from the aqueous phase to the membrane hydrophobic core. This determinant step is still poorly understood. However, according to our lipid-chaperon hypothesis, free lipids in solution play a crucial role in facilitating this footfall. Free phospholipid concentration in the aqueous phase acts as a switch between ion channel-like pore and fibril formation, so that high free lipid concentration in solution promotes pore and repress fibril formation. Conversely, low free lipids in the solution favor fibril and repress pore formation. This behavior is due to the formation of stable lipid-protein complexes. Here, we hypothesize that the helix propensity is a fundamental requirement to fulfill the lipid-chaperon model. The alpha-helix region seems to be responsible for the binding with amphiphilic molecules fostering the proposed mechanism. Indeed, our results show the dependency of protein-lipid binding from the helical structure presence. When the helix content is substantially lower than the wild type, the contact probability decreases. Instead, if the helix is broadening, the contact probability increases. Our findings open a new perspective for in silico screening of secondary structure-targeting drugs of amyloidogenic proteins.



中文翻译:

α-螺旋在淀粉样蛋白结构靶向药物设计中的作用

最受认可的假设将淀粉样蛋白的毒性与其通过形成能够破坏细胞膜的前原纤维瞬态寡聚体对膜完整性的有害影响联系起来。然而,损伤机制必然假设第一步是淀粉样蛋白从水相转移到膜疏水核心。这个决定性的步骤仍然知之甚少。然而,根据我们的脂质伴侣假设,溶液中的游离脂质在促进这种脚步中起着至关重要的作用。水相中的游离磷脂浓度充当离子通道样孔和原纤维形成之间的开关,因此溶液中的高游离脂质浓度会促进孔并抑制原纤维形成。相反,溶液中的低游离脂质有利于原纤维并抑制孔的形成。这种行为是由于稳定的脂质-蛋白质复合物的形成。在这里,我们假设螺旋倾向是实现脂质伴侣模型的基本要求。α-螺旋区域似乎负责与促进所提出机制的两亲分子的结合。事实上,我们的结果表明蛋白质-脂质结合依赖于螺旋结构的存在。当螺旋含量显着低于野生型时,接触概率降低。相反,如果螺旋变宽,则接触概率会增加。我们的发现为淀粉样蛋白的二级结构靶向药物的计算机筛选开辟了新的视角。我们假设螺旋倾向是实现脂质伴侣模型的基本要求。α-螺旋区域似乎负责与促进所提出机制的两亲分子的结合。事实上,我们的结果表明蛋白质-脂质结合依赖于螺旋结构的存在。当螺旋含量显着低于野生型时,接触概率降低。相反,如果螺旋变宽,则接触概率会增加。我们的发现为淀粉样蛋白的二级结构靶向药物的计算机筛选开辟了新的视角。我们假设螺旋倾向是实现脂质伴侣模型的基本要求。α-螺旋区域似乎负责与促进所提出机制的两亲分子的结合。事实上,我们的结果表明蛋白质-脂质结合依赖于螺旋结构的存在。当螺旋含量显着低于野生型时,接触概率降低。相反,如果螺旋变宽,则接触概率会增加。我们的发现为淀粉样蛋白的二级结构靶向药物的计算机筛选开辟了新的视角。我们的结果表明蛋白质-脂质结合依赖于螺旋结构的存在。当螺旋含量显着低于野生型时,接触概率降低。相反,如果螺旋变宽,则接触概率会增加。我们的发现为淀粉样蛋白的二级结构靶向药物的计算机筛选开辟了新的视角。我们的结果表明蛋白质-脂质结合依赖于螺旋结构的存在。当螺旋含量显着低于野生型时,接触概率降低。相反,如果螺旋变宽,则接触概率会增加。我们的发现为淀粉样蛋白的二级结构靶向药物的计算机筛选开辟了新的视角。

更新日期:2021-02-24
down
wechat
bug