塞内卡谷病毒3C蛋白酶分裂DCP1A,以减弱其抗病毒作用
Jingjing Yang1, Zijian Li1, Ruiyi Ma2
1Key Laboratory of Livestock Infectious Diseases, Ministry of Education, and Key Laboratory of Ruminant Infectious Disease Prevention and Control (East), Ministry of Agriculture and Rural Affairs, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, 120 Dongling Road, Shenyang, 110866, China.
Veterinary research
|February 28, 2025
概括
塞内卡谷病毒蛋白酶分裂抗病毒蛋白DCP1A,使其无法降解病毒RNA聚合酶的能力. 这种病毒策略有助于SVV逃避宿主免疫力.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 塞内卡谷病毒 (SVV) 在猪业中造成重大损失.
- SVV蛋白酶3C (3Cpro) 通过裂解必需的宿主蛋白质来对抗宿主免疫力.
- 了解病毒逃避机制对于开发抗病毒策略至关重要.
研究的目的:
- 为了确定针对SVV的新型抗病毒效应剂.
- 阐明SVV 3Cpro对抗宿主抗病毒反应的机制.
- 研究mRNA分解酶1A (DCP1A) 在SVV感染中的作用.
主要方法:
- 在体外SVV感染模型.
- 西方涂抹检测蛋白质裂变和降解.
- 局部定向的突变发生,以产生抗裂变的DCP1A变体.
- 对自性降解途径的分析.
主要成果:
- DCP1A被确定为向SVV 3D RNA依赖RNA聚合酶的宿主抗病毒因子,用于降解.
- 在Q343中,SVV 3Cpro分裂了DCP1A,使其抗病毒功能失活.
- 一种抗裂变的DCP1A突变体显示出增强的SVV限制.
- 通过SVV 3Cpro切割DCP1A,可以防止病毒3D聚合酶的降解.
结论:
- 通过分裂抗病毒蛋白DCP1A.SVV 3Cpro通过分裂抗病毒蛋白DCP1A.SV3Cpro对抗宿主免疫力.
- DCP1A作为干扰素刺激基因 (ISG) 产物,可以限制SVV复制.
- SVV采用特定的分裂策略来逃避宿主抗病毒防御,为病毒免疫逃避提供了洞察力.
相关概念视频
02:33Retroviruses
12.2K
Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...
12.2K
02:28Leaky Scanning
5.1K
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R...
5.1K
01:29Immune Response Against Viral Pathogens
725
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...
725
01:10Retrovirus Life Cycles
45.5K
Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the...
45.5K