Viral epidemics pose major threats to global health and economies. A hallmark of viral infection is the reshaping of host cell membranes and cytoskeletons to form organelle-like structures, known as viral factories, which support viral genome replication. Viral infection in many cases induces the cytoskeletal network to form cage-like structures around viral factories, including actin rings, microtubule cages, and intermediate filament cages. Viruses hijack various organelles to create these replication factories, such as viroplasms, spherules, double-membrane vesicles, tubes, and nuclear viral factories. This review specifically examines the roles of cytoskeletal elements and the endomembrane system in material transport, structural support, and biochemical regulation during viral factory formation. Furthermore, we discuss the broader implications of these interactions for viral replication and highlight potential future research directions.
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http://dx.doi.org/10.52601/bpr.2024.240040 | DOI Listing |
Biophys Rep
February 2025
Unit of Cell Biology and Imaging Study of Pathogen Host Interaction, The Center for Microbes, Development and Health, Key Laboratory of Molecular Virology and Immunology, Shanghai Institute of Immunity and Infection, Chinese Academy of Sciences, Shanghai 200031, China.
Viral epidemics pose major threats to global health and economies. A hallmark of viral infection is the reshaping of host cell membranes and cytoskeletons to form organelle-like structures, known as viral factories, which support viral genome replication. Viral infection in many cases induces the cytoskeletal network to form cage-like structures around viral factories, including actin rings, microtubule cages, and intermediate filament cages.
View Article and Find Full Text PDFJ Virol Methods
March 2025
N.K. Koltsov Institute of Developmental Biology, Russian Academy of Sciences, Moscow 119334, Russia. Electronic address:
The assembly of replication factors into functional complexes is crucial for the initiation of viral genome replication and processing of nascent viral DNA. Binding to viral DNA and interaction of protein domains presumably guide compartmentalization of replication factors. The phase separation due to hydrophilicity and hydrophobicity of components may also contribute to the assembling process.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
March 2025
Department of Microbiology, The University of Chicago, Chicago, IL 60637.
Positive-sense single-stranded RNA [(+)RNA] viruses constitute more than one-third of all virus genera, including numerous pathogens of clinical significance. All (+)RNA viruses reorganize cellular membranes from organelles to establish replication compartments (RCs). These RCs are thought to form a platform for membrane-associated replicases, in addition to protecting the viral RNAs from cytosolic innate immune signaling and RNA-degradation machinery.
View Article and Find Full Text PDFmBio
March 2025
Department of Molecular Microbiology and Immunology, University of Southern California Keck School of Medicine, Los Angeles, California, USA.
Unlabelled: Hepatitis B virus (HBV) core particle is critical for the transport and replication of the viral DNA genome. By characterizing HBV core particles in different subcellular compartments, we found that when the HBV core protein was expressed by itself, it formed core particles with a uniform and fast mobility on a non-denaturing agarose gel. However, when the core protein was expressed from a replication-competent 1.
View Article and Find Full Text PDFJ Med Virol
February 2025
National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China.
Since the eradication of smallpox, zoonotic poxviruses, such as the mpox virus (MPXV), continue to pose a threat to public health. Identifying drugs that reduce poxvirus infection and replication, as well as understanding their molecular mechanisms, is essential for epidemic control. Polo-like kinase 1 (PLK1) has been shown to facilitate vaccinia virus (VACV) infection and replication.
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