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Related Concept Videos

Herpes01:28

Herpes

Herpes simplex type 1 (HSV‑1) is a widespread pathogen responsible for orolabial lesions. It is an enveloped, double-stranded DNA (dsDNA) virus belonging to the family Herpesviridae. Once the virus infects a host cell, its double‑stranded DNA genome is delivered into the nucleus, where a coordinated cascade of immediate‑early, early, and late gene expression directs viral DNA replication, structural protein synthesis, and virion assembly. After primary infection of epithelial cells, HSV-1...
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),...
Protein Kinases and Phosphatases02:54

Protein Kinases and Phosphatases

Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Protein Kinases and Phosphatases02:54

Protein Kinases and Phosphatases

Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
cAMP-dependent Protein Kinase Pathways01:25

cAMP-dependent Protein Kinase Pathways

Cyclic Adenosine Monophosphate (cAMP) is an essential second messenger that activates protein kinase A (PKA) and regulates various biological processes. A single epinephrine molecule binds to GPCR and activates several heterotrimeric G proteins, each stimulating multiple adenylyl cyclase, amplifying the signal, and synthesizing large numbers of cAMP molecules. Small changes in cAMP concentration affect PKA activity. The binding of four cAMP molecules induces a conformational change in PKA,...
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...

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Related Experiment Video

Updated: Jul 11, 2026

Purification of Viral DNA for the Identification of Associated Viral and Cellular Proteins
08:26

Purification of Viral DNA for the Identification of Associated Viral and Cellular Proteins

Published on: August 31, 2017

Conserved herpesvirus protein kinases.

Edward Gershburg1, Joseph S Pagano

  • 1Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA. egershburg@siumed.edu

Biochimica Et Biophysica Acta
|September 21, 2007
PubMed
Summary

Conserved herpesviral protein kinases (CHPKs) are vital for viral infection. Targeting these enzymes, like human cytomegalovirus UL97, offers antiviral potential, but unique structures necessitate individualized drug design.

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Dissecting Host-virus Interaction in Lytic Replication of a Model Herpesvirus

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Temporal Analysis of the Nuclear-to-cytoplasmic Translocation of a Herpes Simplex Virus 1 Protein by Immunofluorescent Confocal Microscopy
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Published on: October 7, 2011

Area of Science:

  • Virology
  • Biochemistry
  • Drug Discovery

Background:

  • Conserved herpesviral protein kinases (CHPKs) are serine/threonine kinases found across all Herpesviridae subfamilies.
  • CHPKs play crucial, conserved roles in viral infection, regulating processes like primary infection, nuclear egress, and tegumentation.
  • Despite conserved functions, individual CHPKs possess unique roles, limiting interchangeability between even closely related kinases.

Purpose of the Study:

  • To highlight the significance of CHPKs as targets for antiviral therapy.
  • To underscore the challenges and potential of developing CHPK-specific inhibitors.
  • To emphasize the need for structure-based inhibitor design for effective antiviral drug development.

Main Methods:

  • Review of recent studies on CHPK functions and knockout phenotypes.
  • Analysis of existing antiviral compounds targeting specific CHPKs, such as HCMV UL97.
  • Comparative analysis of CHPK homology and inhibitor specificity.

Main Results:

  • CHPKs are essential for multiple stages of viral infection, though their regulatory mechanisms are not fully understood.
  • Compounds inhibiting HCMV UL97 show antiviral effects but are ineffective against EBV BGLF4.
  • Low homology between CHPKs complicates the development of broad-spectrum inhibitors.

Conclusions:

  • CHPKs represent attractive targets for novel antiviral therapies.
  • Individualized, structure-based inhibitor design is crucial for effective CHPK-targeted antiviral drugs due to low inter-kinase homology.
  • Determining CHPK structures will significantly advance the development of these targeted therapies.