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Transmembrane Domain Oligomerization Propensity determined by ToxR Assay
Published on: May 26, 2011
对跨膜域的全面比较揭示了有机细胞特异性质
Hayley J Sharpe1, Tim J Stevens, Sean Munro
1MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK.
Cell
|July 7, 2010
概括
细胞膜具有有机体特异的跨膜域 (TMD),其长度和氨基酸组成不同. 这些发现影响了蛋白质预测和细胞分类机制.
科学领域:
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
- 蛋白质组学是指蛋白质组学.
背景情况:
- 细胞细胞膜表现出组成的多样性,但物理性质的差异仍然在很大程度上未被探索.
- 综合膜蛋白的跨膜域 (TMD) 假设反映了它们的居住脂质双层的物理特征.
研究的目的:
- 为了研究是否整体膜蛋白的跨膜域 (TMDs) 具有器官特异性的物理性质.
- 在真菌和脊椎动物的不同器官中比较TMD序列,以确定保存或独特的特征.
主要方法:
- 利用来自真菌和脊椎动物蛋白质组的蛋白质序列的大规模数据集.
- 从局部化到各种细胞器官的蛋白质中对跨膜域 (TMD) 进行了比较分析.
- 分析了TMD的长度和氨基酸成分,包括残留物大小和交叉双层不对称性.
主要成果:
- 跨膜域 (TMD) 不是统一的;它们表现出有机细胞特有的特性.
- 在早期和晚期分泌通路器官之间观察到TMD长度的明显分歧.
- 后ER器官在TMD氨基酸组成中显示出显著的不对称性,与残留物大小相关,并因器官而异.
结论:
- 在TMD中,有机细胞特异性特征是普遍存在的,这表明不同的生物物理环境.
- 这些发现对改进跨膜域预测算法有影响.
- 特定于有机体的TMD可能在调节蛋白质活性和促进分泌途径内的蛋白质和脂质分类方面发挥作用.
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