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相关概念视频

Nuclear Export01:42

Nuclear Export

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The nucleus restricts several proteins within and allows others to pass. The restricted proteins possess a nuclear retention sequence or NRS, anchoring them to the nuclear lamins and preventing their transport to the cytosol. The non-restricted proteins, after their synthesis, are transported to their site of action, such as the cytosol or other organelles, with the help of nuclear export signals or NES.
NES are of three types- the canonical 10-residue long leucine-rich signal and other...
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Translocation of Proteins into the Mitochondria01:19

Translocation of Proteins into the Mitochondria

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Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
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Protein Import into the Peroxisomes01:27

Protein Import into the Peroxisomes

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Cells contain membrane-bound organelles called peroxisomes that oxidize organic molecules by transferring hydrogen atoms to oxygen, producing hydrogen peroxide. Peroxisomes enzymatically convert the released hydrogen peroxide into water and oxygen.
Peroxisomal Protein Import:
Peroxisomes lack the genetic machinery required to code for their own proteins. Hence, most peroxisomal membrane, lumenal and transmembrane proteins are synthesized in the cytoplasm or ER and transported to the peroxisome...
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Export of Misfolded Proteins out of the ER01:32

Export of Misfolded Proteins out of the ER

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After folding, the ER assesses the quality of secretory and membrane proteins. The correctly folded proteins are cleared by the calnexin cycle for transport to their final destination, while misfolded proteins are held back in the ER lumen. The ER chaperones attempt to unfold and refold the misfolded proteins but sometimes fail to achieve the correct native conformation. Such terminally misfolded proteins are then exported to the cytosol by ER-associated degradation or ERAD pathway for...
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Protein Translocation Machinery on the ER Membrane01:28

Protein Translocation Machinery on the ER Membrane

4.6K
The translocon complex situated on the ER membrane is the main gateway for the protein secretory pathway. It facilitates the transport of nascent peptides into the ER lumen and their insertion into 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...
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Overview of Protein Sorting and Transport01:45

Overview of Protein Sorting and Transport

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Eukaryotic cells have different membrane-bound organelles with distinct protein requirements. The process by which proteins are targeted to a specific organelle is called protein sorting.
Protein sorting can be of two types: signal-based sorting and vesicle-based trafficking. In signal-based sorting, specific amino acid sequences called sorting signals target proteins to the proper location inside the cell either via gated transport or by protein translocation.  In gated transport, folded...
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相关实验视频

Updated: Jul 6, 2025

A Genetic Screen to Isolate Toxoplasma gondii Host-cell Egress Mutants
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A Genetic Screen to Isolate Toxoplasma gondii Host-cell Egress Mutants

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托克索普拉斯马蛋白质的出口和效应器的功能.

Simona Seizova1, Abel Ferrel2, John Boothroyd3

  • 1School of Life Sciences, The University of Dundee, Dundee, UK.

Nature microbiology
|January 3, 2024
PubMed
概括
此摘要是机器生成的。

毒素菌向宿主细胞输送效应蛋白,使用专门的机械来生存. 这篇评论探讨了这些出口系统,潜伏感染中的宿主操纵,以及与Plasmodium的进化并行.

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A Genetic Screen to Isolate Toxoplasma gondii Host-cell Egress Mutants
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A Genetic Screen to Isolate Toxoplasma gondii Host-cell Egress Mutants

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科学领域:

  • 寄生虫学的寄生虫学
  • 细胞生物学 细胞生物学
  • 分子生物学分子生物学

背景情况:

  • 毒素菌,一个有义务的细胞内寄生虫,侵入宿主细胞进行复制.
  • 成功的入侵和复制取决于被送入宿主细胞的效应蛋白.
  • 这些效应器操纵宿主细胞功能并抵消宿主防御.

研究的目的:

  • 审查Toxoplasma gondii蛋白质出口系统的架构.
  • 阐明效应蛋白识别和选择的机制.
  • 讨论宿主操纵在潜在感染中的作用及其进化背景.

主要方法:

  • 对Toxoplasma gondii和Plasmodium spp.现有的文献的审查. 蛋白质出口. 蛋白质出口.
  • 对效应蛋白传递机制的分析.
  • 在Apicomplexa属中对蛋白质出口系统的比较研究.

主要成果:

  • 毒素菌使用一个两波系统,以不同的机器来传递效应蛋白质.
  • 宿主细胞操纵对于建立和维持潜在感染至关重要.
  • 对比分析显示,在整个Apicomplexa的蛋白质出口中,蛋白质出口的策略是保留和分歧的.

结论:

  • 了解Toxoplasma gondii的蛋白质出口系统是解读宿主-寄生虫相互作用的关键.
  • 宿主操纵策略为寄生虫进化和病变产生提供了洞察力.
  • 用Plasmodium进行的比较研究提供了对Apicomplexa生物学的更广泛理解.