Related Experiment Video

Updated: May 20, 2026

Highly Sensitive Assay for Measurement of Arenavirus-cell Attachment
08:34

Highly Sensitive Assay for Measurement of Arenavirus-cell Attachment

Published on: March 2, 2016

Biological roles and functional mechanisms of arenavirus Z protein in viral replication

Jialong Wang1, Shamika Danzy, Naveen Kumar

  • 1Department of Veterinary and Biomedical Sciences, University of Minnesota, Twin Cities, Minnesota, USA.

Journal of Virology
|July 5, 2012
PubMed

Insights

The Pichinde virus Z protein is essential for arenavirus replication and viral RNA regulation. Understanding its functions offers potential for developing new antiviral therapies against hemorrhagic fever viruses.

Area of Science:

  • Virology
  • Molecular Biology
  • Infectious Diseases

Background:

  • Arenaviruses cause severe human hemorrhagic fevers with few treatment options.
  • The viral protein Z is implicated in virus-like particle formation and RNA synthesis inhibition.
  • Its precise roles in the infectious viral life cycle remain largely uncharacterized.

Purpose of the Study:

  • To elucidate the essential biological roles of the Pichinde virus (PICV) Z protein during an infectious viral life cycle.
  • To investigate the functions of conserved residues within the Z protein, including the G2 myristylation site, RING domain, and C-terminal residues.
  • To explore the significance of the Z protein's late (L) domain in viral replication and budding.

Main Methods:

  • Utilized a reverse genetics system for Pichinde virus (PICV).
  • Introduced dicodon substitutions in the Z protein's late (L) domain.
  • Performed structure-function analyses on PICV and Lassa fever virus Z proteins.

Main Results:

  • Demonstrated essential roles for conserved Z protein residues (G2, RING domain C/H, L79/P80) in viral replication.
  • Showed that dicodon substitutions in the L domain significantly reduced virus growth, highlighting its importance.
  • Identified conserved molecular mechanisms and variations (e.g., G2 residue function) in Z protein activity across different arenaviruses.

Conclusions:

  • Characterized the critical biological functions of the arenavirus Z protein in an infectious context.
  • Elucidated the distinct roles of Z protein domains in virus budding and viral RNA regulation.
  • Provided insights that may facilitate the development of novel antiviral strategies against arenavirus infections.

More Related Videos

Generation of Recombinant Arenavirus for Vaccine Development in FDA-Approved Vero Cells10:03

Generation of Recombinant Arenavirus for Vaccine Development in FDA-Approved Vero Cells

Published on: August 1, 2013

Bacterial Artificial Chromosomes: A Functional Genomics Tool for the Study of Positive-strand RNA Viruses12:20

Bacterial Artificial Chromosomes: A Functional Genomics Tool for the Study of Positive-strand RNA Viruses

Published on: December 29, 2015

Related Concept Videos

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 stands for...
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...
Viruses with RNA Genomes01:29

Viruses with RNA Genomes

RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
Retrovirus Life Cycles01:10

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...
Viruses of Archaea01:29

Viruses of Archaea

Archaeal viruses play a crucial role in the ecosystems of extremophilic archaea, particularly those belonging to the phyla Euryarchaeota and Crenarchaeota. By shaping host evolution and facilitating gene transfer, these viruses influence microbial communities and contribute to genetic diversity in extreme environments. The archaea they infect thrive in acidic hot springs and hydrothermal vents characterized by high temperatures and low pH. Archaeal viruses exhibit remarkable structural...
Ribozymes02:47

Ribozymes

The term ribozyme is used for RNA that can act as an enzyme. Ribozymes are mainly found in selected viruses, bacteria, plant organelles, and lower eukaryotes. Ribozymes were first discovered in 1982 when Tom Cech’s laboratory observed Group I introns acting as enzymes. This was shortly followed by the discovery of another ribozyme, Ribonulcease P, by Sid Altman’s laboratory. Both Cech and Altman received the Nobel Prize in chemistry in 1989 for their work on ribozymes.
Ribozymes can be...