Apobec3编码Rfv3,这是一种影响逆转录病毒感染中和抗体控制的基因
Mario L Santiago1, Mauricio Montano, Robert Benitez
1Gladstone Institute of Virology and Immunology, San Francisco, CA 94158, USA.
概括
弗兰德病毒耐药性 (Rfv3) 的基因是Apobec3,对于中和复原病毒感染至关重要. 它的无活化会导致易感性,而它的正确功能则提供了对HIV等逆转录病毒的宿主保护.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 遗传学 是一个遗传学.
背景情况:
- 30年来,人们一直在寻找对Friend病毒3 (Rfv3) 耐药性的遗传基础.
- Rfv3 影响抗体反应和对逆转录病毒的病毒性.
研究的目的:
- 为了确定Rfv3基因的分子身份.
- 阐明由Rfv3.3赋予的逆转录病毒耐药性的机制.
主要方法:
- 定位克隆和基因映射以确定Rfv3位点.
- 在小鼠中的候选基因的遗传失活化.
- 对抗性和易受性菌株的Apobec3基因表达和拼接的分析.
- 评估逆转录病毒中和抗体反应和病毒血症.
主要成果:
- Rfv3被确定为位于同一染色体区域的Apobec3基因.
- 对Apobec3的遗传失活化使得Rfv3耐药小鼠对Friend病毒敏感.
- 在Rfv3敏感的小鼠菌株中观察到Apobec3的异常mRNA拼接.
- Apobec3对包括HIV在内的逆转录病毒表现出广泛的抑制活性.
结论:
- Apobec3是Rfv3抗性特征的分子决定因素.
- Apobec3依赖的机制有助于保护宿主免受逆转录病毒感染.
- 研究结果表明,Apobec3在人类逆转录病毒感染 (如艾滋病毒) 中可能发挥作用.
相关概念视频
Retroviruses
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’...
Retrovirus Life Cycles
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 retrovirus to...
Rous Sarcoma Virus (RSV) and Cancer
Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
Rous Sarcoma Virus (RSV) and Cancer
Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
Inhibitors of Virion Maturation and Assembly
As part of their replication cycle, certain viruses synthesize long precursor proteins called polyproteins within infected host cells. In human immunodeficiency virus (HIV), two major polyproteins are produced: Gag and Gag-Pol. The Gag polyprotein supplies the structural components of the virus, while Gag-Pol includes essential viral enzymes such as reverse transcriptase, integrase, and protease. After synthesis, these polyproteins move to the host cell membrane, where they assemble into an...
Inhibitors Of Virion Release
Viral replication and dissemination rely on efficient mechanisms for host cell entry, genome replication, assembly, and release. Influenza viruses, such as types A and B, are negative-sense single-stranded RNA viruses with a segmented genome, that depend on two critical surface glycoproteins to carry out these processes: hemagglutinin (HA) and neuraminidase (NA). HA initiates infection by binding to sialic acid residues on the surface of host epithelial cells, facilitating receptor-mediated...


