Herpesviruses: overview of systematics, genomic complexity and life cycle

Abstract Herpesviruses are double-stranded DNA viruses with distinct morphological features and are among the largest and most complex viruses. According to the International Committee on Taxonomy of Viruses (ICTV), in 2022, there were 133 herpesviruses classified into three families: Orthoherpesvir...

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Main Authors: Aurélie Dotto-Maurel, Isabelle Arzul, Benjamin Morga, Germain Chevignon
Format: Article
Language:English
Published: BMC 2025-05-01
Series:Virology Journal
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Online Access:https://doi.org/10.1186/s12985-025-02779-7
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author Aurélie Dotto-Maurel
Isabelle Arzul
Benjamin Morga
Germain Chevignon
author_facet Aurélie Dotto-Maurel
Isabelle Arzul
Benjamin Morga
Germain Chevignon
author_sort Aurélie Dotto-Maurel
collection DOAJ
description Abstract Herpesviruses are double-stranded DNA viruses with distinct morphological features and are among the largest and most complex viruses. According to the International Committee on Taxonomy of Viruses (ICTV), in 2022, there were 133 herpesviruses classified into three families: Orthoherpesviridae, infecting mammals and birds; Malacoherpesviridae infecting marine molluscs; and Alloherpesviridae infecting fish and amphibians. Herpesviruses have a complex genomic architecture, characterised by unique regions flanked by repeated and inverted sequences. Unique regions can undergo rearrangements leading to the formation of genomic isomers, which could have important implications for the life cycle of the virus. Herpesviruses life cycle consists of two main phases: the lytic phase, during which viral genes are expressed and translated into viral proteins that regulate DNA replication, capsid formation and the production of new particles; and the persistence phase, in which the virus persists in the host without being eliminated by the immune system. This review offers an updated and comprehensive overview of the Herpesvirales order, detailing their morphological characteristics, providing an in-depth taxonomic classification, examining their genomic architecture and isomers, and describing their life cycle.
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spelling doaj-art-e815935f66a74f068b44f93fb379ed422025-08-20T03:08:40ZengBMCVirology Journal1743-422X2025-05-0122112710.1186/s12985-025-02779-7Herpesviruses: overview of systematics, genomic complexity and life cycleAurélie Dotto-Maurel0Isabelle Arzul1Benjamin Morga2Germain Chevignon3Ifremer, ASIM Adaptation et Santé des Invertébrés MarinsIfremer, ASIM Adaptation et Santé des Invertébrés MarinsIfremer, ASIM Adaptation et Santé des Invertébrés MarinsIfremer, ASIM Adaptation et Santé des Invertébrés MarinsAbstract Herpesviruses are double-stranded DNA viruses with distinct morphological features and are among the largest and most complex viruses. According to the International Committee on Taxonomy of Viruses (ICTV), in 2022, there were 133 herpesviruses classified into three families: Orthoherpesviridae, infecting mammals and birds; Malacoherpesviridae infecting marine molluscs; and Alloherpesviridae infecting fish and amphibians. Herpesviruses have a complex genomic architecture, characterised by unique regions flanked by repeated and inverted sequences. Unique regions can undergo rearrangements leading to the formation of genomic isomers, which could have important implications for the life cycle of the virus. Herpesviruses life cycle consists of two main phases: the lytic phase, during which viral genes are expressed and translated into viral proteins that regulate DNA replication, capsid formation and the production of new particles; and the persistence phase, in which the virus persists in the host without being eliminated by the immune system. This review offers an updated and comprehensive overview of the Herpesvirales order, detailing their morphological characteristics, providing an in-depth taxonomic classification, examining their genomic architecture and isomers, and describing their life cycle.https://doi.org/10.1186/s12985-025-02779-7HerpesvirusLife cycleGenomic architecturePhylogeny
spellingShingle Aurélie Dotto-Maurel
Isabelle Arzul
Benjamin Morga
Germain Chevignon
Herpesviruses: overview of systematics, genomic complexity and life cycle
Virology Journal
Herpesvirus
Life cycle
Genomic architecture
Phylogeny
title Herpesviruses: overview of systematics, genomic complexity and life cycle
title_full Herpesviruses: overview of systematics, genomic complexity and life cycle
title_fullStr Herpesviruses: overview of systematics, genomic complexity and life cycle
title_full_unstemmed Herpesviruses: overview of systematics, genomic complexity and life cycle
title_short Herpesviruses: overview of systematics, genomic complexity and life cycle
title_sort herpesviruses overview of systematics genomic complexity and life cycle
topic Herpesvirus
Life cycle
Genomic architecture
Phylogeny
url https://doi.org/10.1186/s12985-025-02779-7
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