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相关概念视频

Overview of Secretory Vesicles01:33

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Secretory vesicles, also known as dense core vesicles (DCVs), are membrane-bound vesicles that transport secretory proteins, such as hormones or neurotransmitters. Regulated secretory vesicles transport proteins from the trans-Golgi network to the exterior of the cell. Proteins present in regulated secretory vesicles are required to be rapidly exocytosed in large amounts upon a specific stimulus.
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Tail-anchored, or TA, proteins are estimated to make up to 3-5% of membrane proteins found in the eukaryotic cell. Such proteins have a single transmembrane domain located approximately 30 amino acid residues upstream from the C-terminal end. As a result, the signal recognition particle (SRP) cannot guide a TA protein to the ER membrane for cotranslational insertion. Hence, they are integrated into the ER membrane post-translationally using their C-terminal end as the anchor. TA proteins...
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Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...
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Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
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Rab proteins constitute the largest family of monomeric GTPases, of which 70 members are present in humans. Rab proteins and their effectors regulate consecutive stages of vesicle transport such as vesicle transport, docking, and fusion to the correct recipient membrane.
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A Functional Assay for Gap Junctional Examination; Electroporation of Adherent Cells on Indium-Tin Oxide
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内细胞结合物调节非传统的GAPDH分泌.

Michael J Cohen1,2, Brianne Philippe1, Peter N Lipke1,2

  • 1Biology Department, Brooklyn College of the City University of New York, Brooklyn, NY 11210, USA.

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概括
此摘要是机器生成的。

异常分泌的酵母蛋白,如甘甲基-3-酸盐脱酶 (GAPDH),使用非特征的途径. 进入内解体系统对于这种非传统的GAPDH分泌至关重要.

关键词:
科尔维特汽车的绳索.这是一个复杂的ESCRT系统.内分泌体分泌系统的内分泌体分泌系统.这是一个HOPS tether.月光蛋白质是月光蛋白质的一种蛋白质.多面体体的身体.酵母细胞壁中的酵母细胞壁.

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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 生物化学

背景情况:

  • 酵母细胞壁承载着经典和非常规分泌的蛋白质.
  • 非传统的分泌通过未知的机制绕过了内质网膜 (ER).
  • 甘-3-酸盐脱酶 (GAPDH) 是一种糖解酶,存在于细胞质和细胞壁中.

研究的目的:

  • 研究酵母中非传统蛋白质分泌的机制.
  • 识别参与细胞壁相关GAPDH分泌的基因.
  • 确定内分泌系统在GAPDH分泌中的作用.

主要方法:

  • 在*Saccharomyces cerevisiae*中选同胞性基因删除突变,以检测细胞壁GAPDH活性发生变化.
  • 使用细胞成像技术分析GAPDH局部化.
  • 研究内体蛋白Vps21对GAPDH分泌和内体贩运的影响.

主要成果:

  • 影响内分泌系统内细胞的基因缺失 (例如,vps21,bro1,vps41,pep12*) 显著影响了GAPDH分泌.
  • 主要的GAPDH异型,Tdh3,在内溶性体区中发现,包括多胞体.
  • 删除内体Rab5-GTPase Vps21的破坏了GAPDH分泌,并延迟了内体的进入.

结论:

  • 内分泌体系统在非传统的GAPDH分泌中发挥着关键作用.
  • 进入内分泌体隔间促进了GAPDH的非传统分泌途径.
  • 这项研究阐明了细胞溶解蛋白到酵母细胞壁的新分泌路径.