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相关概念视频

Insertion of Single-pass Transmembrane Proteins in the RER01:26

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Integral membrane proteins are proteins adhered to the lipid bilayer of a cell organelle or membrane. They can be of two types: transmembrane integral proteins that span the lipid bilayer and monotopic proteins that are attached to either side of the membrane but do not pass through it.
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Porins are beta-barrel proteins translocated to the mitochondrial outer membrane through the TOM complex into the intermembrane space. Porin precursors bind TIM chaperones within the intermembrane space and are guided to the Sorting and Assembly Machinery complex or SAM complex on the outer mitochondrial membrane.
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Insertion of Multi-pass Transmembrane Proteins in the RER01:29

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The rough ER membrane synthesizes, assembles, and embeds transmembrane proteins in diverse topologies. These proteins function as transporters or channels and can remain in the ER membrane or are sent to the Golgi complex, lysosome, and cell membrane.
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Protein Transport into the Inner Mitochondrial Membrane01:34

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Nuclear encoded mitochondrial precursors are imported to the inner membrane in a multistep process involving two separate translocons, TIM22 and TIM23. TIM23 is a cation-selective pore that remains closed by the N terminal segment of the protein. Negative charges on the TIM23 act as a receptor for the incoming precursor, pulling the positively charged matrix-targeting sequence for peptide insertion and translocation.
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Single-pass Transmembrane Proteins01:25

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Integral membrane proteins are tightly associated with the cell membrane and play a crucial role in cell communication, signaling, adhesion, and transport of the molecules. Some integral membrane proteins are present only in the membrane monolayer. For example, the enzyme fatty acid amide hydrolase is present in the cytoplasmic side of the membrane monolayer. In contrast, another type of integral membrane protein, also known as a transmembrane protein, spans across the membrane. Transmembrane...
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The ER, Golgi apparatus, endosomes, and lysosomes work in tandem to modify, sort, and package proteins and lipids. An integrated membrane trafficking network facilitates the back and forth shuttling of molecules within different organelles in the same cell or across the cell membrane.
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相关实验视频

Updated: Jul 24, 2025

Co-Translational Insertion of Membrane Proteins into Preformed Nanodiscs
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Co-Translational Insertion of Membrane Proteins into Preformed Nanodiscs

Published on: November 19, 2020

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膜插入可以一眼看.

Büsra Kizmaz1, Johannes M Herrmann1

  • 1Cell Biology, University of Kaiserslautern, Kaiserslautern 67663, Germany.

Journal of cell science
|July 7, 2023
PubMed
概括
此摘要是机器生成的。

蛋白质转位酶和膜插入酶对于蛋白质的运输和融入细胞膜至关重要. 这包括Oxa1类型和Bama家族蛋白质,对于各种细胞功能和蛋白质拓发生是必不可少的.

关键词:
这是一个BAM复合体.这是一个复杂的EMC综合体.GET复合体是一个复合体.这些是膜插入器.一个Oxa1的Oxa1是什么?蛋白质的生物发生.转移 转移 的情况.在 YIDC 中,YIDC 是 YIDC.在β-桶蛋白质中.

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相关实验视频

Last Updated: Jul 24, 2025

Co-Translational Insertion of Membrane Proteins into Preformed Nanodiscs
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Co-Translational Insertion of Membrane Proteins into Preformed Nanodiscs

Published on: November 19, 2020

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Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy
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Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy

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Reconstitution of Msp1 Extraction Activity with Fully Purified Components
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Reconstitution of Msp1 Extraction Activity with Fully Purified Components

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科学领域:

  • 细胞生物学 细胞生物学
  • 分子生物学分子生物学
  • 生物化学 生化学

背景情况:

  • 蛋白质转位酶 (例如,细菌SecY,ER Sec61,线粒体转位酶) 通过膜传输蛋白质.
  • 这些转位也促进了整体膜蛋白在脂质双层中的插入.
  • 膜插入酶与转位酶一起工作,以确保膜蛋白的适当拓生,折叠和组装.

研究的目的:

  • 提供Oxa1和Bama家族膜插入试验的概述.
  • 讨论这些插入酶在整合具有不同结构的蛋白质中的独特功能.
  • 突出显示Oxa1型插入酶在内分泌网膜 (ER) 和其它细胞区中的作用.

主要方法:

  • 审查现有文献和关于膜插入试验的最新研究.
  • 对Oxa1和Bama家族的结构和功能作用的分析.
  • 通过不同细胞膜 (细菌,ER,线粒体,叶绿体) 的插入酶机制的比较.

主要成果:

  • Oxa1家族蛋白质集成蛋白质与阿尔法螺旋式跨膜域.
  • BamA家族蛋白质将β-桶蛋白集成到脂质双层中.
  • 在ER膜蛋白复合体 (EMC),尾导入 (GET) 和GET和EMC类复合体 (GEL) 中发现了Oxa1型插入酶.

结论:

  • Oxa1和Bama家族代表了主要的膜插酶类的核心组成部分.
  • 这些插入酶对于膜蛋白的正确集成和组装至关重要.
  • 最近的发现扩大了已知的Oxa1-类插入酶的作用,特别是在ER中.