相关实验视频
Updated: Sep 10, 2025

14:08
Study of Protein-protein Interactions in Autophagy Research
Published on: September 9, 2017
9.2K
两种特定的GATE16与TRPML3和RAB33B的相互作用调节了自
Jiwoo Park1, Areum Choi1, Jin Kwon1
1Department of Physiology, Sungkyunkwan University School of Medicine, Suwon, 16419, South Korea.
Scientific reports
|August 25, 2025
概括
涉及GATE16,TRPML3和RAB33B的特定相互作用对自至关重要. 这些蛋白质在孔形成复合体,增强自细胞的形成并促进细胞的清洁.
科学领域:
- 细胞生物学
- 分子生物学
- 自研究
背景情况:
- 自食是一种基本的细胞过程,
- ATG8蛋白质是自的关键调节者,它们调节了必需的机器.
- 细胞内Ca2+通道TRPML3以前被证明与GATE16,一个哺乳动物ATG8同类物,进行特异性相互作用以增强自.
研究的目的:
- 阐明TRPML3-GATE16相互作用的机制和特异性.
- 调查RAB33B在TRPML3介导的自中所起的作用.
- 确定控制这些特定蛋白质与蛋白质相互作用的分子决定因素.
主要方法:
- 在GATE16和TRPML3中识别关键氨基酸基因的位点定向突变.
- 共同免疫沉测试以评估蛋白质与蛋白质的相互作用.
- 自试验用于评估特定相互作用和突变的功能影响.
- 在自诱导过程中追踪蛋白质定位的聚焦显微镜.
主要成果:
- 在GATE16和TRPML3中特定的单氨基酸基因决定了它们在自中相互作用的特异性和功能结果.
- 确定RAB33B是一种与戈尔吉相关的GTPase,在自过程中与TRPML3有功能相互作用,并且具有LC3相互作用区域 (LIR) 动机.
- RAB33B通过其LIR动机特别与GATE16结合,这种相互作用对于自是必不可少的;LIR动机的破坏会抑制该过程.
- 在自诱导时,RAB33B以依赖于LIR的方式从戈尔吉转移到法戈,加强RAB33B-TRPML3相互作用并促进自细胞的形成.
结论:
- 通过GATE16调解的特定相互作用对于将TRPML3和RAB33B招募到光体至关重要.
- 有关GATE16,TRPML3和RAB33B的蛋白质复合物的形成对于高效的自细胞生物发生是必不可少的.
- 这项研究揭示了通过涉及ATG8同类蛋白和Golgi相关蛋白的特定蛋白相互作用来调节自的新机制.
相关概念视频
Rab Cascades
2.7K
Rab GTPases act in a regulated cascade during membrane fusion, helping the lipid bilayers mix. The Rab family of proteins are active when bound to GTP, and inactive when bound to GDP. Hence, they act as guanine nucleotide-dependent molecular switches. Rab-GTP recognizes and binds to long or short-range tethering proteins to capture the target vesicle. These tethers coordinate with SNAREs on the vesicle and the target membrane to assemble the trans SNARE complex that locks the mixing bilayers.
2.7K
Rab Proteins
4.1K
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.
Rab proteins switch between a cytosolic, GDP-bound inactive state and a membrane-anchored, GTP-bound active state. By themselves, Rabs show slow rates of GDP/GTP exchange and GTP hydrolysis. Thus, Rab proteins are considered...
Rab proteins switch between a cytosolic, GDP-bound inactive state and a membrane-anchored, GTP-bound active state. By themselves, Rabs show slow rates of GDP/GTP exchange and GTP hydrolysis. Thus, Rab proteins are considered...
4.1K
Autophagy
4.6K
Autophagy is a self-digesting process by which a cell protects itself from threats both within and outside the cell, ranging from abnormal proteins to invading bacteria. In this process, obsolete components of the cell and invading microbes are degraded by hydrolytic enzymes active in an acidic environment of the lysosomal lumen.
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
4.6K
PI3K/mTOR/AKT Signaling Pathway
3.9K
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a...
3.9K
Delivery Pathways to the Lysosome
7.1K
Eukaryotic cells use different mechanisms to eliminate toxic waste obsolete and worn-out substances. Lysosomes play a pivotal role in this, and hence, these substances are carried to the lysosome from other parts of the cell and extracellular space through different pathways. The most elaborately studied pathways to the lysosome are the endocytic pathways.
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
7.1K
Autophagic Cell Death
3.6K
Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and...
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and...
3.6K

