相关实验视频

Updated: Jun 26, 2025

MicroRNA-based Regulation of Picornavirus Tropism

MicroRNA-based Regulation of Picornavirus Tropism

Published on: February 6, 2017

皮科比尔纳病毒群的基因组和遗传特征表明它是微生物宿主而不是动物宿主

Sabrina Sadiq¹, Edward C Holmes^1,2, Jackie E Mahar¹

¹Sydney Institute for Infectious Diseases, School of Medical Sciences, The University of Sydney, Sydney, NSW 2006, Australia.

Virus evolution

|May 17, 2024

概括

曾经被认为感染动物的PicobirnaviridaeRNA病毒,现在被假设是RNA细菌菌体. 这项研究提出了七个新属,揭示了广泛的跨物种传播和细菌遗传动机.

科学领域:

病毒学病毒学
人类遗传学是一个学科.
生物信息学是一种生物信息学.

背景情况:

传统上,RNA病毒家族Picobirnaviridae与动物的胃肠道有关.
最近的转基因组学研究揭示了庞大的基因组和遗传学多样性.
皮科比纳病毒的分类仍然很差,其正式的分类学认可有限.

研究的目的:

重新评估 Picobirnaviridae 家族的宿主协会和分类学分类.
为这种多样化的RNA病毒群提出一个较低级别的分类学框架.

主要方法:

对包括来自不同宿主和环境的2,286种picobirnavirus在内的数据集的分析.
遗传学分析以确定代表潜在新品种的独特集群.
统计评估病毒-宿主系遗传一致性和基因组动机丰富.

主要成果:

鉴定了七个一致的基因组群,暂时命名为Alpha-,Beta-,Gamma-,Delta-,Epsilon-,Zeta-和Etapicobirnavirus,可能代表新的属.
与其他RNA病毒家族相比,在Picobirnaviridae中更频繁的跨物种传播的证明.
在picobirnavirus基因组中丰富了细菌核糖体结合部位的图案,超过了已建立的RNA细菌菌体中发现的图案.

结论:

这些发现支持这样一个假设:皮科比尔纳病毒主要感染细菌宿主.
这项研究为皮科比尔纳病毒家族提供了一个建议的较低级别的分类学分类.
皮科比纳病毒是一种高度多样化和无处不在的RNA病毒群,具有细菌关联.

关键词:

皮科比尔纳病毒科细菌菌体是一种菌体.这是分类分类的分类.跨物种的传播跨物种的传播.人类的基因组学.分类学分类学.

更多相关视频

Using a Pan-Viral Microarray Assay Virochip to Screen Clinical Samples for Viral Pathogens

Using a Pan-Viral Microarray Assay Virochip to Screen Clinical Samples for Viral Pathogens

Published on: April 27, 2011

Protocols for Investigating the Host-tissue Distribution, Transmission-mode, and Effect on the Host Fitness of a Densovirus in the Cotton Bollworm

Protocols for Investigating the Host-tissue Distribution, Transmission-mode, and Effect on the Host Fitness of a Densovirus in the Cotton Bollworm

Published on: April 12, 2017

相关概念视频

Retroviruses

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’...

Viral Mutations

Viral Mutations

A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material...

Viral Recombination

Viral Recombination

Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.

Lytic Cycle of Bacteriophages

Lytic Cycle of Bacteriophages

Bacteriophages, also known as phages, are specialized viruses that infect bacteria. A key characteristic of phages is their distinctive “head-tail” morphology. A phage begins the infection process (i.e., lytic cycle) by attaching to the outside of a bacterial cell. Attachment is accomplished via proteins in the phage tail that bind to specific receptor proteins on the outer surface of the bacterium. The tail injects the phage’s DNA genome into the bacterial cytoplasm. In the...

Synthetic Biology

Synthetic Biology

Synthetic biology is an interdisciplinary science that involves using principles from disciplines such as engineering, molecular biology, cell biology, and systems biology. It involves remodeling existing organisms from nature or constructing completely new synthetic organisms for applications such as protein or enzyme production, bioremediation, value-added macromolecule production, and the addition of desirable traits to crops, to name a few.
Golden rice
Golden rice is a genetically modified...

Retrovirus Life Cycles

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...