相关实验视频
Updated: Jul 16, 2025

Transmembrane Domain Oligomerization Propensity determined by ToxR Assay
Published on: May 26, 2011
依赖Lhs1的ERAD是由跨膜域上下文决定的
Maria Sukhoplyasova1, Abigail M Keith1, Emma M Perrault1
1Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA, U.S.A.
细胞内膜网膜护航者Lhs1针对特定的非糖基化跨膜蛋白与两个跨膜域 (TMDs) 进行降解. Lhs1-依赖性降解还涉及Hrd1泛素酶,为基质识别提供了洞察力.
科学领域:
- 细胞生物学 细胞生物学
- 蛋白质折叠 蛋白质的折叠
- 细胞内膜网膜质量控制 质量控制
背景情况:
- 跨膜蛋白需要特定的折叠和整合到ER膜中.
- 折叠发生在不同的细胞区 (ER光层,脂质双层,细胞体) 中,具有独特的陪伴者.
- 与ER相关的降解 (ERAD) 机器识别了错误折叠的蛋白质.
研究的目的:
- 为了澄清ERAD中的ER光道护理者Lhs1的基质特异性.
- 为了确定决定Lhs1-依赖性降解的特征.
- 了解Lhs1在蛋白质质量控制中的作用.
主要方法:
- 研究了Lhs1在上皮质通道 (ENaC) 子单元的降解中的作用.
- 分析了依赖Lhs1的ERAD基质的特征.
- 检查了破坏ENaC子单元组装对降解的影响.
- 评估了Lhs1和Hrd1泛素酶通路之间的重叠.
主要成果:
- 依赖Lhs1的基质是不糖化,并具有两个跨膜域 (TMD).
- 孤儿或未组装的TMD标志着Lhs1基底.
- 破坏 ENaC 剪切器组件会触发整个复合体的 Lhs1 依赖性降解.
- Lhs1 作用于 ERAD 基质的子集,这也需要 Hrd1 泛素合酶.
结论:
- Lhs1向特定的跨膜蛋白,其特征是不糖化和多个TMD.
- 间子单元相互作用影响Lhs1介导的降解.
- 在特定的ERAD路径中,Lhs1和Hrd1协作.
- 确定了Lhs1基质识别的关键特征,可能适用于哺乳动物同类GRP170.0.
更多相关视频
10:16SorLA and CLC:CLF-1-dependent Downregulation of CNTFRα as Demonstrated by Western Blotting, Inhibition of Lysosomal Enzymes, and Immunocytochemistry
Published on: January 6, 2017
16:02Demonstration of the Sequence Alignment to Predict Across Species Susceptibility Tool for Rapid Assessment of Protein Conservation
Published on: February 10, 2023
相关概念视频
Insertion of Single-pass Transmembrane Proteins in the RER
Integral transmembrane proteins possess transmembrane and extra membrane domains. The transmembrane domains are primarily made of 20-25 hydrophobic amino acids arranged in a helical secondary confirmation. These...
Insertion of Multi-pass Transmembrane Proteins in the RER
The multipass transmembrane proteins are the type IV integral membrane proteins with multiple topogenic sequences determining their spatial arrangement in the ER membrane. Nearly all multipass proteins lack a cleavable signal sequence and use...
Export of Misfolded Proteins out of the ER
Conserved Binding Sites
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
Single-pass Transmembrane Proteins
Protein Translocation Machinery on the ER Membrane
Sec61 protein conducting channel
In eukaryotes, the translocon complex comprises a core heterotrimeric translocator channel called the Sec61 complex. This channel includes three transmembrane proteins, Sec61α, Sec61β, and Sec61γ, and is the largest subunit of the...