Related Experiment Video
Updated: Mar 15, 2026

MicroRNA-based Regulation of Picornavirus Tropism
Published on: February 6, 2017
Organization, Function, and Therapeutic Targeting of the Morbillivirus RNA-Dependent RNA Polymerase Complex
Julien Sourimant1, Richard K Plemper2
1Institute for Biomedical Sciences, Georgia State University, 100 Piedmont Av, Atlanta, GA 30303, USA. jsourimant@gsu.edu.
Abstract:
The morbillivirus genus comprises major human and animal pathogens, including the highly contagious measles virus. Morbilliviruses feature single stranded negative sense RNA genomes that are wrapped by a plasma membrane-derived lipid envelope. Genomes are encapsidated by the viral nucleocapsid protein forming ribonucleoprotein complexes, and only the encapsidated RNA is transcribed and replicated by the viral RNA-dependent RNA polymerase (RdRp). In this review, we discuss recent breakthroughs towards the structural and functional understanding of the morbillivirus polymerase complex. Considering the clinical burden imposed by members of the morbillivirus genus, the development of novel antiviral therapeutics is urgently needed. The viral polymerase complex presents unique structural and enzymatic properties that can serve as attractive candidates for druggable targets. We evaluate distinct strategies for therapeutic intervention and examine how high-resolution insight into the organization of the polymerase complex may pave the path towards the structure-based design and optimization of next-generation RdRp inhibitors.
Insights
Morbilliviruses, like measles virus, cause significant disease. Understanding their RNA-dependent RNA polymerase (RdRp) complex is key to developing new antiviral drugs targeting these vital pathogens.
Area of Science:
- Virology
- Structural Biology
- Drug Discovery
Background:
- Morbilliviruses are significant human and animal pathogens, including measles virus.
- These viruses possess single-stranded negative-sense RNA genomes within a lipid envelope.
- Viral RNA transcription and replication depend on the RNA-dependent RNA polymerase (RdRp) complex.
Purpose of the Study:
- To review recent advances in understanding the structure and function of the morbillivirus polymerase complex.
- To highlight the urgent need for novel antiviral therapeutics against morbilliviruses.
- To identify the RdRp complex as a promising target for drug development.
Main Methods:
- Review of recent structural and functional studies on morbillivirus polymerase.
- Analysis of distinct therapeutic intervention strategies.
- Examination of high-resolution insights into polymerase complex organization.
Main Results:
- Breakthroughs in understanding the structural and functional aspects of the morbillivirus polymerase complex have been achieved.
- The viral polymerase complex exhibits unique structural and enzymatic properties.
- High-resolution data offers potential for structure-based drug design.
Conclusions:
- The morbillivirus polymerase complex is a viable target for antiviral drug development.
- Structure-based design approaches can lead to next-generation RdRp inhibitors.
- Targeting the polymerase complex is crucial for combating morbillivirus infections.
Related Concept Videos
Eukaryotic RNA Polymerases
All three eukaryotic RNAPs require specific transcription factors, of which the...
Eukaryotic RNA Polymerases
Transcription Initiation
The promoters and enhancers and their accessory proteins allow tight regulation of...
Viruses with RNA Genomes
Size and Structure of Viral Genomes
Types of RNA
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...

