The Enigmatic Capsid Protein of an Encephalitic Rubivirus

Pratyush Kumar Das1, Margaret Kielian2

  • 1Department of Cell Biology, Albert Einstein College of Medicine, Bronx, NY, USA.

Journal of Virology
|January 21, 2021
PubMed

Insights

Rubella virus (RuV) was the sole member of the Rubivirus genus, infecting only humans via airborne or maternal-fetal transmission. This research expands our understanding of Rubivirus diversity and evolution.

Area of Science:

  • Virology
  • Molecular Biology
  • Evolutionary Biology

Background:

  • The genus Rubivirus historically included only Rubella virus (RuV), a human pathogen transmitted airborne or maternally.
  • RuV infection causes congenital rubella syndrome, a significant public health concern.

Discussion:

  • This study investigates the genetic diversity and evolutionary relationships within the Rubivirus genus.
  • Analysis reveals novel Rubivirus species beyond RuV, expanding the known viral landscape.
  • Comparative genomics sheds light on the adaptation and host range of these viruses.

Key Insights:

  • Discovery of new Rubivirus species challenges the previous single-member classification.
  • Phylogenetic analysis indicates ancient origins and diversification within the genus.
  • Identification of distinct genetic markers differentiates novel Rubiviruses from RuV.

Outlook:

  • Further research is needed to characterize the pathogenicity and transmission of newly identified Rubiviruses.
  • Understanding Rubivirus evolution can inform the development of broader antiviral strategies.
  • This work provides a foundation for future studies on Rubivirus-host interactions and global health impact.

Related Concept Videos

Viral Structure00:56

Viral Structure

Viruses are extraordinarily diverse in shape and size, but they all have several structural features in common. All viruses have a core that contains a DNA- or RNA-based genome. The core is surrounded by a protective coat of proteins called the capsid. The capsid is composed of subunits called capsomeres. The capsid and genome-containing core are together known as the nucleocapsid.
70.8K
Introduction to Virus01:28

Introduction to Virus

Viruses are unique biological entities that blur the boundary between living and non-living systems. Although they lack cellular structure and metabolic processes, they can exhibit characteristics of life when infecting a host. Their defining feature is a nucleic acid core, composed of either DNA or RNA, encapsulated within a protein coat called a capsid. This simple structure allows them to invade host cells and use their machinery for replication efficiently.Viral Structure and...
716
Subviral Agents01:29

Subviral Agents

Subviral agents are infectious entities that resemble viruses but lack one or more viral components, such as a capsid or essential replication machinery. These agents include viroids, prions, and satellites, each possessing distinct structural and functional characteristics that influence their mode of infection and replication.Viroids are the simplest subviral agents, consisting of circular, single-stranded RNA molecules without a protein coat. They exclusively infect plants, relying entirely...
310
Leaky Scanning02:28

Leaky Scanning

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...
5.4K
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...
412
Conjugated Proteins02:50

Conjugated Proteins

Simple proteins and protein complexes contain only amino acids. In contrast, many other proteins, called conjugated proteins, covalently bond with non-protein moieties.
Nucleoproteins are protein complexes that contain nucleic acids, categorized as deoxyribonucleoproteins (DNPs) or ribonucleoproteins (RNPs) respectively. The nucleosome is a typical example of a DNP where nuclear DNA is associated with histone proteins. The major antigen for the Covid-19 virus SARS-CoV is an RNP that is critical...
24.1K