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相关概念视频

Retroviruses02:33

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’...
Size and Structure of Viral Genomes01:26

Size and Structure of Viral Genomes

Viral genomes exhibit remarkable diversity in size, structure, and composition, influencing their replication strategies and interactions with host cells. These genomes consist of either DNA or RNA and may be linear or circular. Additionally, they can be single-stranded or double-stranded, with each configuration affecting how the virus propagates within a host. RNA viruses, for instance, generally have smaller genomes than DNA viruses, a factor that contributes to their high mutation rates and...
Inhibitors of Viral Protein Synthesis01:30

Inhibitors of Viral Protein Synthesis

Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
Inhibitors Of Virion Release01:25

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...
Antiviral Nucleoside Inhibitors01:22

Antiviral Nucleoside Inhibitors

Antiviral Nucleoside InhibitorsAntiviral nucleoside inhibitors are structural analogs of natural nucleosides that interfere with viral DNA or RNA synthesis. These compounds selectively target viral polymerases due to their resemblance to host nucleosides, thereby disrupting viral genome replication.Mechanism of Acyclovir ActionAcyclovir is a guanosine analog with a three-carbon acyclic side chain. It selectively targets herpes simplex virus type 1 (HSV-1), herpes simplex virus type 2 (HSV-2),...
Inhibitors of Virion Maturation and Assembly01:19

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...

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相关实验视频

Updated: Jul 13, 2026

Interview: HIV-1 Proviral DNA Excision Using an Evolved Recombinase
10:20

Interview: HIV-1 Proviral DNA Excision Using an Evolved Recombinase

Published on: June 16, 2008

由HIV-1 Vif-Cul5-SCF复合体诱导APOBEC3G的无处不在和降解.

Xianghui Yu1, Yunkai Yu, Bindong Liu

  • 1Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA.

Science (New York, N.Y.)
|October 18, 2003
PubMed
概括

人类免疫缺陷病毒-1 (HIV-1) Vif蛋白使用细胞Cul5-SCF复合体来降解抗病毒因子APOBEC3G. 这种相互作用对于病毒逃避至关重要,并为开发新的艾滋病毒疗法提供了潜在的目标.

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13:07

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Published on: January 30, 2019

相关实验视频

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Interview: HIV-1 Proviral DNA Excision Using an Evolved Recombinase
10:20

Interview: HIV-1 Proviral DNA Excision Using an Evolved Recombinase

Published on: June 16, 2008

Amplification of Near Full-length HIV-1 Proviruses for Next-Generation Sequencing
10:18

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Published on: October 16, 2018

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Published on: January 30, 2019

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:

  • 人类免疫缺陷病毒-1 (HIV-1) Vif蛋白对病毒感染性至关重要.
  • 维夫抗体对抗宿主抗病毒因子,包括CEM15/APOBEC3G,使病毒复制.
  • 了解VIF的机制是开发有效的抗病毒策略的关键.

研究的目的:

  • 阐明HIV-1 Vif蛋白抑制APOBEC3G的抗病毒活性的分子机制.
  • 为了确定参与Vif介导APOBEC3G降解的细胞组件.
  • 探索Vif-Cul5-SCF途径作为抗病毒点的潜力.

主要方法:

  • 同免疫沉测试检测蛋白质与蛋白质相互作用.
  • 西方涂抹用于评估蛋白质无处不在和降解.
  • 功能测定测量APOBEC3G在Vif突变物存在时的抗病毒活性.

主要成果:

  • 艾滋病毒-1 Vif 与 Cul5,长长蛋白 B 和 C 和 Rbx1 相互作用,形成一个类似 Cul5-SCF 的复合体.
  • 维夫抑制APOBEC3G的抗病毒活性取决于Cul5-SCF复合体的形成.
  • 通过Cul5-SCF通路,Vif诱导APOBEC3G的无处不在和随后的降解.
  • 一个无法与 Cul5-SCF 相互作用的 Vif 突变体失去了使 APOBEC3G 失活的能力.
  • Cul5-SCF通路对于Simian Immunodeficiency Virus (SIVmac) 中的Vif功能也至关重要.

结论:

  • 保存的Cul5-SCF通路对于HIV-1 Vif的功能至关重要.
  • Vif劫持了Cul5-SCF复合体以调解APOBEC3G降解,促进病毒逃离宿主免疫力.
  • 维夫-库尔5-SCF相互作用代表了对抗HIV-1和相关病毒的抗病毒药物开发的有希望的治疗标.