Sec6通过促进P62介导的MAVS降解来抑制BEFV触发的I型IFN反应
Xiaoting Zhang1, Wenqing Ma1, Hongbin He1
1Ruminant Diseases Research Center, Key Laboratory of Animal Resistant Biology of Shandong, College of Life Sciences, Shandong Normal University, Jinan 250358, People's Republic of China.
Veterinary microbiology
|August 8, 2025
概括
Sec6蛋白通过自性降解MAVS来抑制对牛短暂发烧病毒 (BEFV) 的抗病毒免疫反应. 这促进了病毒复制,突出了Sec6.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 外囊成分Sec6参与细胞粘附和囊泡运输.
- Sec6在牛短暂发烧病毒 (BEFV) 复制和先天免疫力中的作用尚不清楚.
研究的目的:
- 研究Sec6在BEFV复制中的功能.
- 阐明Sec6影响抗病毒先天免疫反应的机制.
主要方法:
- 基于细胞的测试用于研究病毒复制.
- 西方涂抹和免疫沉以分析蛋白质相互作用.
- 自和信号通路分析.
主要成果:
- 发现Sec6可以抑制由BEFV触发的I型干扰素 (IFN-I) 信号通路.
- Sec6通过自性降解线粒体抗病毒信号蛋白 (MAVS) 来促进BEFV复制.
- Sec6通过加强其与自受体P62.2的关联来促进MAVS降解.
结论:
- 在抑制抗病毒先天免疫力方面,Sec6发挥着新的作用.
- Sec6针对MAVS进行自降解,从而促进BEFV复制.
- 针对Sec6可能是控制BEFV感染的潜在策略.
相关概念视频
Receptor Downregulation in MVBs
2.1K
Multivesicular bodies (MVBs) are mature endosomes that sort ubiquitinated proteins and then fuse with lysosomes to degrade the sorted proteins. Epidermal growth factor (EGF) and its receptor (EGFR) form a complex that can be internalized through endocytosis, sorted into an MVB, and later degraded.
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
2.1K
Immune Response Against Viral Pathogens
917
The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
917
The Unfolded Protein Response
5.1K
The ER is the hub of protein synthesis in a cell. It has robust systems to quality control protein folding and also for degradation of terminally misfolded proteins. Under normal conditions, a small proportion of misfolded proteins that cannot be salvaged need to be transported to the cytoplasm by the ER-associated degradation or ERAD pathways. However, if the ERAD cannot handle the misfolded proteins, the cell activates the unfolded protein response or UPR to adjust the protein folding...
5.1K
Abnormal Proliferation
4.6K
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
4.6K
Nonsense-mediated mRNA Decay
10.8K
The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
10.8K
Cytotoxic T Cells-mediated Immune Response
2.0K
Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
2.0K


